Sperm whales, a(n) species, maintain their populations close to carrying capacity.

r-selected

k-selected

Answers

Answer 1
Sperm whales are k-selected species. Their reproduction rates are slower because they have longer gestation periods (like elephants or humans). 
Answer 2
Sperm whales, a K SELECTED species, maintain their population close to carrying capacity. 
K selected species are those species, whose population fluctuate at or near the carrying capacity. The carrying capacity of a specie refers to the maximum population size of a specie, which the environment can sustain indefinitely. K selected species have stable population and they usually reproduce low number of offspring. 

Related Questions

Which provides the largest amount of sodium in the typical american diet?

Answers

table salt or salt contained in junk food like fried chicken and french fries

Tyler is admitted to the hospital after an accident. In the hospital, Tyler overhears the doctor telling his mom that although he has a fracture in the axial skeleton, he’s lucky because the bone doesn’t protect any vital organ that’s essential for survival. Which bone has Tyler fractured?

Answers

C. Sternum

The rest are not involved in the axial skeleton or protect vital organs

Answer: plato answer

c) sternum

Explanation:

The only unpaired connective tissue structure of the diaphragm is:

Answers

the central tendon of the diaphragm

A lichen is actually composed of two organisms: a fungus and an alga. they depend on each other for survival. the most specific term that describes their relationship is

Answers

The relationship between the fungus and algae of a lichen is known as a symbiotic relationship.

In this kind of relationship, the two organisms work together to create one stable unit.

People who exercise regularly can reduce their risk of osteoporosis. megaloblastic anemia. hemosiderosis. all of these are correct.

Answers

I believe that people who exercise regularly can reduce the risk of osteoporosis. Osteoporosis is a condition of fragile bone with increased susceptibility to fracture. It weakens the bones and increases the risk of bones breaking. Exercises such as brisk walking, jogging, jumping rope, climbing stairs among others may reduce the risk of osteoporosis. 

What is an El Nino-southern oscillation event

Answers

is an irregularly periodic variation in winds and sea surface temperatures over the tropical eastern Pacific Ocean, affecting climate of much of the tropics and subtropics. The warming phase of the sea temperature is known as El Niño and the cooling phase as La hope that helps

The El Niño-Southern Oscillation (ENSO) is a climate pattern characterized by periodic changes in ocean temperatures and atmospheric pressure in the Pacific region, influencing global weather patterns and leading to various regional climate effects.

The El Niño-Southern Oscillation, or ENSO, is a significant climate phenomenon that involves cyclical changes in the temperature of the Pacific Ocean and atmospheric pressure. During an El Niño event, there is a phase of warm ocean water that extends along the central and east-central equatorial Pacific, which leads to high atmospheric pressure in the western Pacific and low pressure in the eastern Pacific. The opposite event, La Niña, features cooler than usual ocean temperatures in the same region.

ENSO events are known to impact global weather patterns, leading to diverse effects such as higher temperatures in northwestern North America during El Niño or cooler temperatures during La Niña. Abnormal dry conditions in regions like northern Australia and variations in fish populations and rainfall in places like Peru are also associated with these oscillations. These variations play a pivotal role in interannual and interdecadal climate variability.

Research indicates that global warming may intensify the effects of ENSO events. The entire cycle of El Niño and La Niña is part of a complex interplay between ocean temperatures and trade winds, which can take years to progress and is essential for redistributing heat from the tropical Pacific towards higher latitudes.

Which of these is not a cognitive symptom of chronic stress?

Answers

The answer for the above question is that People may gain or lose weight. Chronic stress is stress that is experienced for a very long time. The cognitive signs of stress include; forgetfulness, preoccupation, lack of concentration, diminished productivity, lack of attention to detail, reduced activity among other symptoms. 

A cell with membrane-bound proteins that selectively bind a specific hormone is called that hormone's _____. a cell with membrane-bound proteins that selectively bind a specific hormone is called that hormone's _____. endocrine cell regulatory cell target cell secretory cell

Answers

I believe a cell with membrane-bound proteins that selectively bind a specific hormone is called that's hormone's target cell. Hormones are chemical substances that effect the activity of another part of the body (a target cell). The main function of endocrine glands is to secrete hormones directly into the bloodstream, the hormones serves as messengers, controlling and coordinating activities throughout the body. 

What are the main structures of the urinary system? what is the function of each of these structures hbs?

Answers

the main structures of the urinary system are
kidneys- kidneys filter blood and ejects waste material like urea and excess water
ureteres- two tubes that transport waste in form of urine from the kidney to the bladder
bladder-stores urine until the right time to get rid of it
urethra- tube that transports urine from the bladder to outside the body

difference between batesian and mullerian mimicry

Answers

1. In batesian mimicry one harmless species that palatable to predator mimic the appearance of a harmful species so that predator can not attack on them.In mullerian mimicry two equallly noxious species evole to look similar. 
2. In mullerian mimicry it is easier to educate the predator faster by looking alike, than wasting time and increasing preying incidents.

Final answer:

Batesian mimicry involves a harmless species mimicking a harmful one without any real defenses, while Müllerian mimicry involves multiple harmful species sharing warning coloration to mutually reinforce predator avoidance.

Explanation:

The difference between Batesian and Müllerian mimicry lies in the authenticity of the signal they send to potential predators. In Batesian mimicry, a harmless species mimics the warning coloration of a harmful one. This strategy protects the harmless species as predators mistake them for the toxic species they resemble. However, these mimics do not possess any real defense mechanisms aside from their mimicry. An example of this is the bee-like robber fly which resembles the bumblebee, without possessing the ability to sting.

In contrast, Müllerian mimicry involves multiple species that not only share similar warning coloration but are also genuinely harmful to predators. In this form of mimicry, all participating species benefit as they mutually reinforce the avoidance behavior among predators. A classic example is the convergence of foul-tasting butterfly species, where each butterfly species is unpalatable on its own.

If the Batesian mimic did not have its mimicry attributes, it would likely face increased levels of predation due to the absence of the deceptive protection mimicry provides.

What condition can result from neurofibrillary tangles and amyloid plaques?
a. hearing loss
b. alzheimer's disease
c. parkinson's disease
d. abnormal fmri results?

Answers

The correct option is b. Alzheimer's disease

Alzheimer's disease can result from the formation of amyloid plaques and neurofibrillary tangles due to their activity in the brain. Alzheimer's disease can occur when amyloids which are meant to break down and be completely removed piles up to form hard, insoluble plaques. Also, neurofibrillary tangles which are found inside the brain consist of tau (a protein that forms part of a structure called a microtubule). An abnormal state of the tau protein and the breakdown of the microtubule structures will result in Alzheimer's disease.






What is the breakdown and discharge of the soft uterine tissues and the unfertilized egg called?

Answers

It's called the
Follicular Phase

when did multicellular organisms appear

Answers

when a single cell organism splits in too

If the dna of a certain organism has guanine as 30% of its bases, then what percentage of its bases are adenine?

Answers

G always pairs with C...So, if there is 30% G, then there's 30% C...which is 60%...that leaves 40% A+T - and you have to split this up too - so 20% Thymine (T) and 20% Adenine (A).
Final answer:

According to Chargaff's rules, if the DNA of an organism contains 30% guanine, then it is expected to contain 30% cytosine and 20% adenine, as the remaining 40% is split equally between adenine and thymine.

Explanation:

According to Chargaff's rules, the amount of adenine (A) is equal to the amount of thymine (T), and the amount of guanine (G) is equal to the amount of cytosine (C). This rule is universally true for all DNA, regardless of the organism or species. Therefore, if the DNA of a certain organism has guanine as 30% of its bases, the same percentage, 30%, will be cytosine. Then, the remaining 40% will be divided equally between adenine and thymine, resulting in 20% adenine.

To clarify, the four bases in DNA are adenine, thymine, guanine, and cytosine. Based on Chargaff's rule (A=T and G=C), if guanine makes up 30% of the DNA, then cytosine also makes up 30% of the DNA. Thus, the remaining 40% is shared equally between adenine and thymine, giving 20% adenine and 20% thymine.

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The process by which sympatric speciation might occur would most likely be the result of: convergent evolution. natural selection. adaptive radiation. vicariance.

Answers

The process by which sympatric speciation might occur would most likely be the result of natural selection.

Identify at least two sources of organic waste that are produced by aquatic ecosystems

Answers

The broadest distinction between sources of organic waste within aquatic ecosystems can be by grouping waste as either from plant or animal matter. Aquatic ecosystems do host plant life such as algae and macrophytes. Often, during periods of excess nutrients into the ecosystem, called eutrophication, algal and macrophyte growth will experience an explosion. Once the nutrients are depleted, the algae and macrophytes will begin to die off, introducing organic waste to the system. Animal-based waste within an aquatic ecosystem can result from defecation by fish and water birds, as well as the death of organsims.                                           

Aquatic ecosystems produce organic waste through eutrophication caused by excess nutrients leading to algal blooms and the decay of plants and animals. Additional waste comes from sewage, industrial discharge, and agricultural runoff, which all contribute to higher biochemical oxygen demand and reduced water quality.

Organic waste produced by aquatic ecosystems can be generated from different sources. Some of these include:

Eutrophication, which results in an increased concentration of nutrients such as nitrogen and phosphorus in water bodies, often from human and farm animal waste. This nutrient influx supports the growth of algae and microorganisms, which after dying, contribute to organic waste through decomposition.The decay of plants and animals that lived in the water. As these organisms die, their bodies contribute to the organic waste at the bottom of the aquatic ecosystem. This can include the rapid growth and subsequent death of algae, known as algal blooms, caused by the high levels of nutrients.

animals may fight, make threatening sounds; and act aggressively toward members of the same species. These behaviors usually occur as the result of?

Answers

Final answer:

Aggressive behavior in animals is often a result of competition for resources such as territory and mates, with intraspecific competition being particularly common. To avoid actual combat, animals use aggressive displays to communicate their strength and discourage others from engaging in a fight. Territorial behavior is widespread in the animal kingdom and these displays are a preferred method to reduce physical conflicts.

Explanation:

Animals may engage in fights, make threatening sounds, and act aggressively due to competition for resources such as territory, water, food, or mates. This competition can be intraspecific, which is among members of the same species, or interspecific, which is between different species. Aggression is an intentional behavior aimed at causing harm or pain, and it sometimes results in serious injuries or death. In many instances, instead of actual physical confrontation, animals utilize aggressive displays to communicate their willingness to fight and their fighting ability. These displays can serve as a mechanism to avoid actual combat by allowing animals to assess each other's strength and fighting prowess, deciding if it is worth engaging in a fight.

Some animal species are highly territorial and will defend their living space against intruders of the same species and sex. This territorial behavior often involves aggressive displays that convey a message to other animals to back off, thus reducing the possibility of injuries from physical encounters. For example, male gorillas display aggression through chest beating and ground thumping rather than attacking directly, conserving energy and minimizing the risk of harm. Moreover, birds like the Australian magpies may attack intruders, and certain fish, reptiles, and mammals exhibit similar territorial behaviors.

Lastly, it is important to note that such confrontations can lead to fights over mates or territory, potentially resulting in severe injury or death for one of the participants. Nevertheless, aggressive displays are a common strategy that aims to prevent such drastic outcomes by resolving conflicts before they escalate to physical violence.

Final answer:

Animals may display aggressive behavior due to competition for resources such as territory, water, food, or mates. This behavior can involve physical fighting or aggressive displays. Territorial behavior is also a common cause of aggression in animals.

Explanation:

Aggressive behavior in animals usually occurs as a result of competition. Animals may fight, make threatening sounds, and act aggressively towards members of the same species when they compete for resources such as territory, water, food, or mates. This behavior is known as intraspecific competition.

Intraspecific competition can lead to aggressive displays, such as a dog baring its teeth to intimidate another dog. These displays allow individuals to assess their opponent's fighting ability and determine whether it's worth engaging in a physical fight. It is thought that some of these displays may exaggerate an animal's actual fighting ability and are used to bluff opponents.

Aggressive behavior can also occur when individuals defend their territory. Many animals are territorial and vigorously defend their living space against intruders, especially those of the same species and sex. Territorial behavior is common among birds, fish, reptiles, and mammals.

Process by which living things produce more organisms like themselves

Answers

The process by which living things produce more organisms like themselves is the reproduction. There are two types of reproduction namely; asexual reproduction where only one parent is involved, and sexual reproduction that needs two parents, such that the cells of the two parents (egg and sperm) join, resulting to a unique offspring since they have characteristics from each parent are passed down/combined. 

A solution that has a lower salt concentration than the salt concentration inside the cells osmosis 2. a solution with the same salt concentration as the salt concentration inside the cells phospholipid 3. the diffusion of water across a semipermeable membrane isotonic 4. when cells eat other cells or large substances hypotonic 5. a molecule with polar and nonpolar ends that, along with protein, makes up the plasma membrane pinocytosis 6. when cells eat small or dissolved substances phagocytosis 7. a molecule that has partial positive and negative charges at each end polar molecule 8. a large, complex organic molecule consisting of a large number of amino acids linked together by peptide bonds protein

Answers

1. Hypotonic solution; a solution that has lower salt concentration than the solvent concentration inside the cells.A hypotonic solution has more solvent than the solute, therefore, when a cell is placed in a hypotonic solution it gains water through osmosis and increases in size. However, for an animal cell, it will increase in size and then bursts because it lacks cell wall. 

2. Isotonic solution is the solution with the same slat concentration as the solvent concentration. In a isotonic solution, the solute concentration and the solvent concentration are at equilibrium, hence if a cell is placed in a such a solution there will be not net change or effect on the cell. 

3. Osmosis is the diffusion of water across a semipermeable membrane. Osmosis involves the movement of water molecules from a region of high concentration to a region of lower concentration through a semipermeable membrane. An example of osmosis is the intake of water molecules in the plants through the roots.

4. Phagocytosis is the process where cells eat other cells or large substances. Phagocytosis involves the mechanism by which cells or phagocytes binds to a cell or an item it wants to engulf on the cell surface. For example; when a macrophage ingests a pathogen, the pathogen becomes trapped in a phagosome which then fuses with a lysososme and destroys the pathogen by digesting.  

5. A phospholipid is a molecules with a polar and a non polar ends, that along with protein makes up the plasma membrane. Phospholipid is a class of lipids that consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group. It is the main component of the cell membrane, and makes the membrane to have a selective permeability. 

6. Pinocytosis is the process where cells eat small or dissolved substances. Pinocytosis is also known as fluid endocytosis; it is a type of endocytosis where small particles that are suspended in an extracellular fluid are brought into the cell by the means of invagination of the cell membrane, which cause the particles to be suspended in a vesicle. 

7. A polar molecule is a  molecule that has a partial positive and negative charges at each end. Polar molecules results from the polar bonds which comes from the difference in electronegativity between the atoms involved. Water is a good example of polar molecule because it has a partial positive charge on one side (hydrogen) and a partial negative charge on the other (oxygen). 

8. A protein is a large complex organic molecules consisting of a large number of amino acids linked together by peptide bonds. They are usually long chains of amino acids or polypeptides, that are essentially molecules used in metabolic processes. They have a range of functions, which includes, repair and maintenance, source of energy, structural components, chemical messengers, among others. 


Answer:

1. Hypotonic solution; a solution that has lower salt concentration than the solvent concentration inside the cells.A hypotonic solution has more solvent than the solute, therefore, when a cell is placed in a hypotonic solution it gains water through osmosis and increases in size. However, for an animal cell, it will increase in size and then bursts because it lacks cell wall. 

2. Isotonic solution is the solution with the same slat concentration as the solvent concentration. In a isotonic solution, the solute concentration and the solvent concentration are at equilibrium, hence if a cell is placed in a such a solution there will be not net change or effect on the cell. 

3. Osmosis is the diffusion of water across a semipermeable membrane. Osmosis involves the movement of water molecules from a region of high concentration to a region of lower concentration through a semipermeable membrane. An example of osmosis is the intake of water molecules in the plants through the roots.

4. Phagocytosis is the process where cells eat other cells or large substances. Phagocytosis involves the mechanism by which cells or phagocytes binds to a cell or an item it wants to engulf on the cell surface. For example; when a macrophage ingests a pathogen, the pathogen becomes trapped in a phagosome which then fuses with a lysososme and destroys the pathogen by digesting.  

5. A phospholipid is a molecules with a polar and a non polar ends, that along with protein makes up the plasma membrane. Phospholipid is a class of lipids that consists of two hydrophobic fatty acid tails and a hydrophilic head consisting of a phosphate group. It is the main component of the cell membrane, and makes the membrane to have a selective permeability. 

6. Pinocytosis is the process where cells eat small or dissolved substances. Pinocytosis is also known as fluid endocytosis; it is a type of endocytosis where small particles that are suspended in an extracellular fluid are brought into the cell by the means of invagination of the cell membrane, which cause the particles to be suspended in a vesicle. 

7. A polar molecule is a  molecule that has a partial positive and negative charges at each end. Polar molecules results from the polar bonds which comes from the difference in electronegativity between the atoms involved. Water is a good example of polar molecule because it has a partial positive charge on one side (hydrogen) and a partial negative charge on the other (oxygen). 

8. A protein is a large complex organic molecules consisting of a large number of amino acids linked together by peptide bonds. They are usually long chains of amino acids or polypeptides, that are essentially molecules used in metabolic processes. They have a range of functions, which includes, repair and maintenance, source of energy, structural components, chemical messengers, among others. 

Explanation:

How can the extinction of a single species affect how the ecosystem functions? give an example?

Answers

It can throw the ecosystem off because species depend on each other so if one is gone it can make everything gone down hill.

Answer:

Extinction of even a single keystone species will cause significant change to the ecosystem. Extinction of a species that is easily replaced by others may have little impact

Explanation:

Hypothesis: homologous structures are evidence of a common ancestor ?

Why is this correct ?

Answers

yes, because homologous structures are different structures we have that other different organisms might have. humans and monkeys both have arms, although they are completely different species, this can tell scientists that they could have shared a common ancestor in the past, and may have evolved

Final answer:

Homologous structures are similar anatomical structures that suggest a common ancestor. They have a common origin and shared basic patterns of bones or genetic sequences. These structures provide evidence for a common ancestor because their similarities can be traced back to a shared evolutionary history.

Explanation:

Homologous structures are similar anatomical structures that appear in different species and suggest a common ancestor. These structures have a common origin and shared basic patterns of bones or genetic sequences. For example, the grasping hands found in both humans and chimpanzees are homologous structures, indicating a common ancestor with the ability to grasp. Homologous structures provide evidence for a common ancestor because their similarities can be traced back to a shared evolutionary history.

What is the stimulus for reflex flicking movements?

Answers

The stimulus for reflex flicking movements are the vertical movements.A stimulus is a signal that causes an animal to react in some way. Some stimulus may come from outside of the animals's body while others like thirst, come from inside the animal's body. The reaction of the animal towards a stimulus is called the response. A reflex is a quick involuntary action.

The stimulus for the  reflex flicking movements are vertical movements that enables the animal to respond to its environment.

What is a reflex action?

A reflex action is an action that goes on without the conscious effort of a person. It is controlled by the parasympathetic nervous system.

The stimulus for the  reflex flicking movements are vertical movements that enables the animal to respond to its environment.

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When action potentials reach presynaptic terminals ____ is released causing synaptic vesicles to fuse with the pre-synaptic membrane?

Answers

An unusually quick rate of cellular secretion, also known as exocytosis, is released which then causes the vesicles proximal to the transmitter to be fused to the membrane.

What is Exocytosis?

Exocytosis is the process by which substances are transported from a cell's inside to the exterior of the cell. Since it uses energy, this procedure falls under the category of active transport.

Exocytosis, which serves as the opposite of endocytosis in plant and animal cells, is a critical mechanism. Endocytosis is the process by which things from outside the cell are transported inside.

Membrane-bound vesicles containing biological molecules are moved to the cell membrane during exocytosis. The vesicles affix to the cell membrane and rupture, releasing their contents outside the cell.

Therefore, An unusually quick rate of cellular secretion, also known as exocytosis, is released which then causes the vesicles proximal to the transmitter to be fused to the membrane.

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When an action potential reaches the presynaptic terminals, 'calcium' is released causing synaptic vesicles to fuse with the presynaptic membrane.

Here is a detailed step-by-step explanation of this process:

An action potential arrives at the axon terminal, causing depolarization of the membrane.This depolarization opens voltage-gated calcium channels.Calcium ions (Ca²+) enter the cell due to the concentration gradient.The influx of Ca²+ ions triggers a signaling cascade which causes synaptic vesicles (that contain neurotransmitter molecules) to move towards and fuse with the presynaptic membrane.The synaptic vesicles then release neurotransmitters into the synaptic cleft via exocytosis.

The released neurotransmitters can then bind to receptor proteins on the postsynaptic membrane, thereby propagating the signal.

Most familiar non-vascular plants that contain simple conducting cells are

Answers

The most familiar non-vascular plants that contain simple conducting cells are Mosses. Most non vascular are bryophytes and are small in size, they lack vascular tissues and also lack true leaves, seeds, and flowers. Instead of roots, the have hair-like rhizoids that functions to anchor them to the ground and to absorb water and mineral salts from the soil. They are three types, mosses, hornworts and liverworts.

Which pair of organisms would you expect to have more in common? two organisms from the same phylum two organisms from the same kingdom?

Answers

By the same phylum, my good sir

State one example when resistance is desirable answers

Answers

The answer would be electric heater or a light bulb. Resistance can be measured by the opposition to a current flow within an electrical circuit. It is measured in ohms which was named by George Simon Ohm which was a German physicist.

Definition: this is the process of organisms adapting to their environments over time.

Answers

This process is evolution.

It's actually Natural Selection

attachment of acetyl groups to __________ promotes transcription.

Answers

Attachment of acetyl groups to histone promotes transcription.

This mechanism is known as histone acetylation and it is a part of gene expression. The lysine residues inside the N-terminal tail from the histone core of the nucleosome are the substrate for enzymes-histone acetyltransferase which transfer an acetyl functional group from another molecule. Acetylation removes the positive charge on the histones and thus decrease the interaction negatively charged phosphate groups of DNA. As a result, chromatin becomes more relaxed structure and transcription is promoted.

The conservation of marine mammals is widespread. The prohibition of whaling was one of the first steps. Which of the following statements is not a reason for the prohibition of whaling?

A) Many species of whales are on the brink of extinction.
B) Whales are threatening the livelihood of fisherman by eating too many fish.
C) Many of the products once harvested from whales can now be created or found in areas.
D) The ocean is a fragile ecosystem, the loss of a top-level or larger consumer could negatively effect the entire ecosystem and damage the oceans permanently.

Answers

The correct answer is B. 

Answer: B) Whales are threatening the livelihood of fisherman by eating too many fish.

Explanation:

Whaling is a process of hunting whales for obtaining their meat and oil. Prohibition of whales is important so as to restrict the loss of population of whales through hunting which could be responsible for their extinction.

B) Whales are threatening the livelihood of fisherman by eating too many fish. is the correct option. This is because of the fact that whaling is prohibited to restrict the human activity of hunting not to restrict the natural feeding activity of the whale population.

What is a flap of tissue in the heart that acts like a one way door?

Answers

Valves are the thin flat tissues in the heart that acts like a one way door. The valves serve the role of preventing the back flow of blood. The heart has four major valves; that is the tricuspid valve located between the right atrium and the right ventricle, Pulmonary valve at the right ventricle and the pulmonary artery, bicuspid valve located between the left atrium and the left ventricle, and the aortic valve at the base of the aorta.
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