Humans are heterotrophs because we depend on preformed organic molecules from other organisms for energy and building blocks for growth. We can't produce our own food through photosynthesis.
Humans are called heterotrophs for several reasons. Here are the key points:
We are totally dependent on preformed organic molecules from food to meet all our energy needs.We also require organic molecules as building blocks for our anabolic processes.Heterotrophs, including humans, cannot produce their own food through photosynthesis; instead, we must consume other organisms.The term 'heterotroph' comes from Greek roots meaning 'other feeder', indicating that our food comes from other organisms.All food consumed by humans can be traced back to autotrophs like plants, which produce organic molecules through photosynthesis.attachment of acetyl groups to __________ promotes transcription.
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.
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
The process by which sympatric speciation might occur would most likely be the result of: convergent evolution. natural selection. adaptive radiation. vicariance.
State one example when resistance is desirable answers
If the dna of a certain organism has guanine as 30% of its bases, then what percentage of its bases are adenine?
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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How does dna replicate (know the name of this model)? what enzyme is responsible for dna replication?
Pseudostratified columnar epithelial tissue with cilia is located in the linings of the
Pseudostratified columnar epithelial tissue with cilia is located in the linings of the trachea as well as the upper respiratory tract. The presence of pseudostratified columnar epithelium with cilia in the upper respiratory tract protects the lungs from the effects of large dust particles, pollutants,corrosive agents and pathogens as the goblet cells of the epithelium secrete mucus to trap these particles and prevent them from traveling further down respiratory passages.
Pseudostratified columnar epithelial tissue with cilia is found in the lining of the respiratory tract. It has a protective role in preventing unwanted particles from entering the lungs.
Explanation:Pseudostratified columnar epithelial tissue with cilia is predominantly found in the respiratory tract of humans. This particular type of epithelial tissue is characterized by a single layer of cells that appears layered due to the varying positions of the nuclei within the cells. The role of the cilia on these cells is to trap and transport mucus and dust particles upwards to prevent them from entering the lungs, hence providing a crucial protective role for the respiratory system.
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The only unpaired connective tissue structure of the diaphragm is:
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.
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.
Most familiar non-vascular plants that contain simple conducting cells are
Definition: this is the process of organisms adapting to their environments over time.
It's actually Natural Selection
Lipid rafts are small long-lived structures that respond to stimuli to transiently associate with each other to form larger raft platforms.
The vavle preventing blood from re entering left ventricle is
How can the extinction of a single species affect how the ecosystem functions? give an example?
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:
What are the main structures of the urinary system? what is the function of each of these structures hbs?
when did multicellular organisms appear
Which provides the largest amount of sodium in the typical american diet?
People who exercise regularly can reduce their risk of osteoporosis. megaloblastic anemia. hemosiderosis. all of these are correct.
animals may fight, make threatening sounds; and act aggressively toward members of the same species. These behaviors usually occur as the result of?
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.
Hypothesis: homologous structures are evidence of a common ancestor ?
Why is this correct ?
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.
A woman has just found out that she has a lethal genetic disease, and she wishes to conceive a child before she dies. what assisted reproductive technology could be used to ensure that her child would not receive the disease allele yet would still be genetically hers?
Which body parts make bile to break up fats during digestion?
Describe and explain the difference in muscularity between the crop and the gizzard earthworm
The crop in earthworms functions as a storage area and has less muscular walls, while the gizzard is heavily muscular to enable it to grind and churn the soil and organic matter. This reflects their different roles in digestion. A similar distinction is seen in birds, where the gizzard contains grit to grind food.
Explanation:The muscularity difference between the crop and the gizzard of an earthworm centers on their respective functions in the digestive system. The crop is a thin-walled organ that primarily serves as a storage compartment, allowing earthworms to ingest more soil and organic matter than they can immediately digest. It is not heavily muscular as it does not need to contract vigorously. In contrast, the gizzard is a thick, muscular organ designed to churn and grind the soil and organic matter ingested by the earthworm. The muscular walls of the gizzard are much stronger because they must contract powerfully to pulverize the food, which aids in the breakdown and digestion process. This difference in muscularity reflects the different roles these two organs play in the digestion process. Whereas the crop holds food in preparation for digestion, the gizzard actively participates in the mechanical breakdown of food.
In birds, a similar distinction exists. The crop functions as a storage area to moisten and soften food, while the gizzard, often enhanced with swallowed stones or grit, serves the purpose of grinding the food before digestion. Grain-eating birds, for example, possess a well-developed gizzard with ridges to enhance this grinding process, which compensates for the absence of teeth.
If a child's parents are both musicains is it possible for that cilid to be genetically predisposed for playing music? why or why not
Mature human sperm and ova are similar in that they _____. mature human sperm and ova are similar in that they _____. are approximately the same size each have a flagellum that provides motility are produced from puberty until death both have the same number of chromosomes
Mature human sperm and ova are similar in that they both have the same number of chromosomes. The human sperm and ova are the reproductive cell in male and female respectively. The sperm cells are motile while the ova are not. A mature human sperm and ova both contain 23 pairs of chromosomes.
Mature human sperm and ova are similar in that they have the same number of chromosomes (23), making them haploid cells. However, there are notable differences in their size, structure, and rate of creation. Specifically, only sperm possess a flagellum for motility and are produced in much larger numbers.
Explanation:Mature human sperm and ova are similar in that they both have the same number of chromosomes, which is 23. This is half the number present in body cells, making them haploid cells. This is important as it allows the zygote, the cell formed after fertilization, to have the correct number of chromosomes (46).
Regarding size and motility, mature sperm and ova exhibit differences. For instance, sperm cells are much smaller than most cells, including the ovum or oocyte (female gamete). Only the sperm cell possesses a flagellum, a tail-like structure, that provides it motility, enabling it to swim towards the ovum for fertilization.
The production of sperm and ova also varies. Approximately 100 to 300 million sperm are produced daily, whereas typically only one oocyte is ovulated per month in females.
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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
Process by which living things produce more organisms like themselves
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?
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.
The average length of time between an individual's first symptoms of dissociative identity disorder and the identification and diagnosis of the disorder by a professional is
What is produced in a bacterial cell soon after viral rna appears in the cell?
Viral proteins is produced in a bacterial cell soon after viral RNA appears in the cell
Explanation:
The virus which infects the bacteria is called as bactriophage. When the bactreiophage attaches the bacteria, it releases its RNA into the bacterial cells. As the viral RNA enters the host cell which is nothing but the bacteria, it initiates to replicate due to which proteins are synthesized.
Thus the first product which is produced in a bacterial cell soon after viral RNA is protein. As the protein are made other metabolic process starts and fully developed viruses are synthesized.