Which of the following has the biggest impact on biodiversity in ecosystems?
a.) hatitat loss
b.)climate change
c.) invasive species
d.) overexploiting
Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands. Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands.
A. True
B. False
Answer:
True
Explanation:
Salivation or the secretion of the saliva through the salivary glands present in the mouth are controlled by the nervous system.
The primary nervous system involved in the salivation is the parasympathetic system of neurons. The parasympathetic system is involved in the rest and digest response of the body.
The parasympathetic system act by releasing acetylcholine in the acinar cells of the salivary glands. The acetylcholine binds to the receptors and causes a release of calcium. The calcium in the cell fuse with the membrane and thus saliva is released.
Thus, true is the correct answer.
Organelles protect a cell by Select one:
A. sequestering biochemicals that could dismantle other cellular structures.
B. forming a thick outer barrier.
C. containing powerful enzymes that kill any bacteria that enter.
D. producing new DNA if the genetic material is damaged.
Explanation:
the answer is B
it provides boundaries for the cell to protect it from the environment and regulate the passage of wastes
Bacteria are microscopic organisms that reproduce rapidly and often cause disease.
Antibiotics are drugs given to people to cure bacteria-caused diseases. Since the 1950s,
scientists have observed that antibiotics cannot kill many kinds of bacteria. What best
explains the reason why antibiotics are less effective now?
(10 Points)
O
People today do not take antibiotics as directed by doctors.
O
Antibiotics used today are weaker drugs than those used in the past.
O
The genes of some kinds of bacteria make them resistant to antibiotics.
O
Doctors have increased the testing of patients for diseases caused by bacteria.
Answer: The genes of some kinds of bacteria make them resistant to antibiotics.
What muscle is responsible for contraction of the urinary bladder during micturition?
Answer:
Detrusor & Urethra
Explanation:
The major contractile muscle of the bladder is the detrusor. Urination involves either sustained contractions or short intermittent contractions of the detrusor along with contraction of the muscles in the urethra, the duct from the urinary bladder that conducts urine from the body.
write a food chain in which the hawk is a tertiary 3rd consumer:
A food chain is a linear pathway of energy flow in an ecosystem. To create a food chain where the hawk is a tertiary consumer, the chain can be: Grass -> Rabbit -> Snake -> Hawk.
Explanation:A food chain is a linear pathway of energy flow in an ecosystem. In order to create a food chain where the hawk is a tertiary consumer, we need to consider the trophic levels in the chain. The primary producers are the plants or phytoplankton, then the primary consumers are herbivores, followed by the secondary consumers that are usually carnivores. Finally, the tertiary consumers are carnivores that eat other carnivores. So, a food chain where the hawk is a tertiary consumer could be: Grass (producer) -> Rabbit (primary consumer) -> Snake (secondary consumer) -> Hawk (tertiary consumer).
In a food chain with a hawk as a tertiary consumer, the sequence is: grass (producer), grasshopper (primary consumer), frog (secondary consumer), and hawk (tertiary consumer).
A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. Each organism in a food chain occupies a specific trophic level.
Here is an example of a food chain where the hawk is a tertiary consumer
Producers: Grass (photosynthetic organisms)Primary Consumers: Grasshopper (herbivores that eat grass)Secondary Consumers: Frog (carnivores that eat grasshoppers)Tertiary Consumers: Hawk (carnivores that eat the frog)In this food chain, nutrients and energy flow from the grass to the grasshopper, then to the frog, and finally to the hawk.
Filtered fluid leaving the glomerular capillaries immediately enters the
Answer:
Answered below
Explanation:
The kidneys have a functional unit called the nephrons. Each nephron has a filter called the glomerulus. The glomerulus is an entanglement of blood capillaries encapsulated in the glomerular capsule. The glomerulus receives blood from the renal vessels. The capillaries of the glomerulus have tiny pores on their walls and they form a capillary bed where filtration occurs.
The filtered water and nitrogenous waste leaves the glomerular capillaries and immediately enter the proximal convoluted tubules where reabsorption occurs. From the proximal convoluted tubules it moves to the loop of Henle to the distal convoluted tubules and then to the collecting duct.
Answer:
It enters the efferent arterioles.
Explanation: The glomerulus receive blood supply from afferent arterioles.
The glomerulus filter blood and remove glucose, amino acids, water, salts, urea . Due to the high blood pressure , the solutes are forced to move the glomerulus space. It immediately enter the afferent arterioles and it passes through the tubule and specific substance are reabsorbed back to the blood.
Which of the following statements about weathering is true?
a. Physical and chemical are the two types of weathering.
b. Weathering occurs when rocks are subjected to the movement of wind or water.
Humans are the only cause of weathering.
d. Movement is required for weathering to take place.
Organisms that swim through water may have similar traits. For example, both dolphins and sharks have a dorsal fin, which helps the animal to stay upright and not roll over while swimming. Externally, the fins are similar. Internally, they are quite different. The latter observation suggests that is a case of what type of evolution?1. Convergent2. Divergent3. Adaptive radiation4. Allopatric
Answer:
Convergent
Explanation:
Convergent evolution is when different organisms evolve over a similar trait. Dolphins and Sharks both evolved over a similar trait but do not have a common ancestor, this is evidence of a convergent evolution.
What role does the heart play in helping the circulatory system perform its functions?
Answer:
Blood circulates through a network of vessels throughout the body to provide individual cells with oxygen and nutrients and helps dispose of metabolic wastes
Explanation:
did this help
________ prevents blood movement from right ventricle to right atrium
Answer:
Tricuspid valve: Allows blood to pass from the right atrium to the right ventricle; prevents blood from flowing back into the right atrium as the heart pumps (systole).
Explanation:
In spite of hundreds of millions of dollars spent on insecticides targeted at pest species, such as mosquitoes and crop pests, we have been unable to drive any to extinction. On the other hand, bird, fish, plant, and insect species that we barely recognize have gone extinct. This has mainly been due to:
A) huntingB) farmingC) insecticides such as DDTD) habitat destructionE) scientific collecting
Answer:
E) scientific collecting
Explanation:
The main reason for bird, fish, plant, and insect species going extinct is habitat destruction, with examples such as the passenger pigeon and the dusky seaside sparrow. Overhunting, pollution, and pesticide use, notably DDT, have also contributed to extinctions, while pest species often demonstrate resilience, option C is correct.
Despite the intensive use of insecticides, we have not driven pest species like mosquitoes and crop pests to extinction. However, many non-pest species have become extinct due to human actions. The primary reason for the extinction of bird, fish, plant, and insect species is habitat destruction. A classic example is the passenger pigeon, which was once abundant in North America but was driven to extinction by overhunting and habitat destruction in the 1800s. Similarly, the dusky seaside sparrow was declared extinct in 1990 mainly due to habitat destruction and the impact of the pesticide DDT.
Overall, habitat destruction, which includes the transformation of natural environments into agricultural land and urban areas, poses the most significant threat to biodiversity. The continuous decline in biodiversity is also exacerbated by pollution, the propagation of invasive species, and climate change impacts. Ironically, many species considered pests are adaptable and resilient in the face of human efforts to manage them through chemical means, while more vulnerable species suffer unintended consequences.
As herds of cattle graze (eat grass in a field) they cause ground movements that bring insects to the surface. Birds use this opportunity to feed on the insects brought above ground. what type of symbiolic relationship?
Considerable evidence indicates that the null model of community structure is incorrect because _________.
a. each species responds independently of other species to the prevailing physical environment.
b. interactions among species have no significant influence on community structure.
c. when one species is removed, the populations of the other species are unaffected.
d. species interactions modify the fundamental niche of the species involved, influencing their relative abundance and, in some cases, their distribution.
Explanation:
Null model of community structure describes the communities which occur in the absence of a mechanism
Fundamental niche represents all the environmental conditions where a species is able to live or can live, there are no ecological barriers present in this type of niche
Species interactions modify the fundamental niche as a result distribution and abundance of species changes, ecological barriers comes into existence and fundamental niche changes into realized niche where species actually lives
Auroras are lights that appear at earths northern and southern poles. What is the main cause of an aurora
Answer:
A.
Explanation:
When charged particles from the sun strike atoms in Earth's atmosphere, they cause electrons in the atoms to move to a higher-energy state. When the electrons drop back to a lower energy state, they release a photon: light. This process creates the beautiful aurora.
URGENT!!! A population of sixteen emu grew to thirty-nine in one year. After two years, the population had grown to forty-eight. The maximum number of emu that the environment can support is approximately sixty due to limited resources such as food and water. The carrying capacity of the emu population is .
A. Sixteen
B. Thirty Nine
C.Forty eight
D. sixty
Answer: D. sixty
Explanation: the answer is 60 or sixty
A licensed hazardous waste materials hauler will dispose of used absorbent materials and will provide the proper documentation for your environmental file. A) True B) False
Answer:
A) True
Explanation:
Hazardous waste materials haulers are people that have been properly educated and well trained on the effect and various categories of hazardous waste to people and the environment as well as a proper way to dispose of the waste materials.
They also carry licenses that certify them as people who are permitted to dispose of hazardous waste materials.
Hazardous waste materials haulers also properly document any hazard that they come in contact with in the environment as well as proper documentation of hazardous waste materials that are transported.
Archaebacteria means... A ancient bacteria B spider bacteria C building bacteria D spiral bacteria
Answer: A. ancient bacteria
Explanation: microorganisms that are similar to bacteria in size and simplicity of structure but radically different in molecular organization. They are now believed to constitute an ancient intermediate group between the bacteria and eukaryotes.
In the cell cycle during which phase does the cell prepare for mitosis?
A. cytokinesis
B. G1 phase
C. anaphase
D. G2 phase
Answer:
the answer is A
hope this helps
The Neanderthal skeleton known as the "old man" showed evidence of many injuries over a long life. Several broken bones had healed, and almost all of his teeth had fallen out. What does this most likely indicate?
Answer:
It has been suggested that these kinds of lesions may be indicative of fighting with other members of its species or the attacks of predators
Explanation:
The Neandertals were exposed to very hard environmental conditions, thereby these lesions may be indicative of such conditions to which this species was exposed.
what is biotechnology?
Answer:
Put in simple terms, biotechnology is a technology that involves the use of living organisms.
You use biotechnology to create useful chemicals and products or to perform an industrial task.
Hope this helped
:)
Answer:
Biotechnology
A form of technology that uses living organisms, usually genes, to modify products, to make or modify plants and animals, or to develop other microorganisms for specific purposes.
Atmospheric carbon dioxide levels have been increasing gradually for many years. Scientists cite this increase as one of the main causes of climate change, which is a serious environmental problem for people all over the world. One component of a possible engineering solution to this problem is to use plants, algae, or phytoplankton to increase the global rate of photosynthesis. What scientific reasoning provides evidence that this solution could be effective?
A. Plants and other photosynthetic organisms change into fossil fuels over time.
B. Photosynthesis traps carbon dioxide in the soil.
C. Photosynthesis acts to remove carbon dioxide directly from the atmosphere.
D. Plants and other photosynthetic organisms provide food for consumers, who perform cellular respiration.
Plants and other photosynthetic organisms provide food for consumers, who perform cellular respiration.
What is Photosynthesis?The process by which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis.
Plants absorb water (H2O) and carbon dioxide (CO2) from the soil and atmosphere during photosynthesis. Water is oxidized, which means it loses electrons, while carbon dioxide is reduced, which means it receives electrons, inside the plant cell.
Water is converted into oxygen and carbon dioxide into glucose as a result. After storing energy within the glucose molecules, the plant releases the oxygen back into the atmosphere.
Therefore, Plants and other photosynthetic organisms provide food for consumers, who perform cellular respiration.
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In the process of photosynthesis, plants use carbon dioxide (CO2), water (H2O), and light energy to produce a sugar (C6H12O6) and oxygen (O2). In the process of aerobic respiration, animals and plants release energy from sugar and oxygen and produce carbon dioxide and water. The chemical equations that describe these reactions look like this:
6CO2 + 6H2O + light C6H12O6 + 6O2 C6H12O6 + 6O2 6CO2 + 6H2O + energy
How do these equations explain why the total amount of O2 and CO2 remains the same?
Answer:
it is H2O to the 3 power
Explanation:
-A population of birds with various size beaks eats seeds. Small seeds can be eaten by birds with small beaks. Larger,
thicker seeds can only be eaten by birds with larger thicker beaks. During a drought, only large thick seeds exist so only
the large, thick-beaked birds survive.
is it directional, disruptive or stabilizing selection
Answer:
Directional selection
Explanation:
The conditions of the environment change over time. These changes bring about the adaptation or not of species, hence, bringing about SELECTION. Selection is of different types but based on the example given in the question, DIRECTIONAL selection suits the description best. Directional selection is a kind of selection that occurs when an environmental change causes species with a particular phenotypic characteristics to be favored over the contrasting phenotype. Directional selection eventually results in the one-directional increase of species with a particular phenotype.
This is the case in this example involving a population of birds with different sizes of beaks (phenotype). The size of beaks determines the size of seed eaten by that bird i.e. small-beaked bird eats small seeds while birds with large and thick beaks eat large and thick seeds. A change in environmental conditions, which is drought, causes only large and thick seeds to be readily available. This means that only the birds with large and thick beaks can feed. Hence, the environment has selected or favored the birds with a large and thick beak over the ones with smaller beaks. This is an example of DIRECTIONAL selection because the selection goes in one phenotypic direction (birds with large, thick beaks).
The described situation is an example of directional selection, where the beak size in the bird population became larger due to selective pressures favoring larger beaks during a drought.
Directional selection occurs when one extreme phenotype is favored over others, causing the allele frequency to shift over time in the direction of that phenotype.
Before the drought, the bird population had a variety of beak sizes that allowed them to eat different types of seeds.During the drought, only large, thick seeds were available, which could only be eaten by birds with larger, thicker beaks.As a result, birds with smaller beaks died off, while birds with larger beaks survived and reproduced.Over time, the average beak size of the population increased as the genes for larger beaks became more frequent in the gene pool.complete question:
A population of birds with various size beaks eats seeds. Small seeds can be eatenby birds with small beaks. Larger, thicker seeds can only be eaten by birds with larger, thicker beaks. During a drought, only large thick seeds exist so only the large, thick-beaked birds survive. Does this so stabilizing selection, directional selection or disruptive selection?
What is the tendency of an object to resist a change in its motion?
A. Velocity
B. Inertia
C. Gravity
D. Momentum
Answer: (BTW this is a Physics question) B, Inertia.
Explanation: Inertia, according to Newton's First Law (The Law of Inertia), is defined as an object's tendency to resist changes in its state of motion.
Mrs. Fryer visits her nephrologist for an erythropoietin (EPO) injection for her anemia. She has Stage 3 chronic kidney disease, which is the cause of the anemia. Applying the coding concept from ICD-10-CM guideline I.A.13., what ICD-10-CM code(s) should be reported for the EPO injection
Answer:
N18.3, D63.1
Explanation:
Chronic Kidney Disease (CKD) is defined as the condition in human body that is known for by step by step loss of kidney function over a time being. N18.3 is usually given to patient in stage 3 of CKD. Epoetin injection is an artifical of human erythropoietin (EPO). naturally, EPO is produced in the body, by the kidneys largely. It energies or encourage the bone marrow to produce red blood cells. lack of EPO in the body can lead to severe occurence of anemia.D63.1 is usually called a chargeable ICD code. it is specifically used to show a diagnosis of anemia in chronic kidney disease.
Answer: N18.3, D63.1
The ICD-10-CM codes to be reported for Mrs Fryer EPO injection is N18.3, D63.1
N18.3 ; For Stage three kidney disease
F63.1 ; To show any sign of anaemia in people suffering from kidney disease.
Explanation: ICD-10-CM is a type of diagnosing tool they is used in the United states to code all diagnoses in all healthcare settings.
Anaemia is a blood disorder that is characterised by decrease in the quality and quantity of red blood cell in circulation in the body.
Erythropoetin is a hormone in the body that is triggered by decrease in the oxygen level in the blood,it is produced by the kidneys and it promotes the rate at which the bone marrow forms or produces red blood cell.
Mrs Fryer has stage 3 kidney disease which means that the kidney is grossly diseased and can't perform it's functions any longer one of which includes the production of erythropoetin,this erythropoetin is now administered to her artificially other than the natural one the body produces inorder to make up to the one the diseased kidney couldn't produce,this m erythropoetin will help the bone marrow to produce red blood cell in order to combat the anaemia that Mrs Fryer is facing/suffering from.
Explain the relationship between cells, tissues and organs
Answer:
Cells are the smallest structural and functional unit of the Human body.
When a group of specialized cells perform a single job they form a TISSUE.
When a group of tissue carry out a particular function in the body they form the ORGANS.
Now when a group of organs perform the life process in the human body it constitute an ORGAN SYSTEM.
Explanation:
Cells are the basic units of life that pool together to form tissues. Tissues are groups of similar cells that perform a common function. Various types of tissues collaborate to form organs, each with a particular role in the organism.
Explanation:The relationship between cells, tissues, and organs stems from the hierarchical organization of the body, in which increasing complexity levels lead to multicellular organisms.
Cells are the basic units of life, capable of performing all vital functions. They can divide to create new cells and group together performing similar functions to form tissues.
Tissues are groups of cells performing a common function. Organs, however, are complex structures consisting of different types of tissues operating in concert to fulfill a specific job in the organism, like the heart pumping blood or lungs ensuring oxygen supply.
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Muhammad is a 72-year-old man who has problems with urinary retention. after an examination, muhammad's doctor explains that he has hyperplasia of his prostate gland that is restricting urine flow. which urinary structure is being affected by muhammad's hyperplastic prostate gland?
Answer:
Bladder
Explanation:
Prostatic hyperplasia is also known as prostrate gland enlargement, it causes blockage of urine flow out of the bladder which can eventually lead to bladder and kidney problem.
Answer:
When urine is accumulated in the bladder, it flows through nervous stimulation of urinary muscles controlling a tiny tube which connects the urethra to the penis to empty the bladder. This structure is called the urethra. it conducts both the sperm and urine out of the bladder through the penis for ejaculation and micturition
Therefore because of hyperplasia of the prostate, which leads to increase in mass of the prostate gland.The latter presses against the walls of the urethra, reducing its capillarity , restriction in urine flow,leading to retention of urine in the bladder.
Explanation:
if snakes were removed from this food web, what would probably happen to the grasshopper population
Answer:
If snakes were removed the grass hopper population would increase
Explanation:
If snakes went there to eat the grass hoppers more grass hoppers would be alive cause of course theres not that much to eat them
1. The process by which organisms best suited to the environment survive is called
A natural selection
B equilibrium
c frequency
D coordinated stasis
Answer:
Natural selection