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jolli1 [7]
3 years ago
9

I am studying a fish-eating hawk that lives by large lakes and find that it could capture more pounds of fish per unit time if i

t were to hunt farther from shore instead of staying close to the shoreline. The hawk, however, does stay close to the shoreline. This finding demonstrates that
Biology
2 answers:
spin [16.1K]3 years ago
5 0

Answer: This finding will demonstrate that an optimal foraging hypothesis based on maximizing caloric intake alone is probably incorrect.

Explanation:

The Optimal Foraging Theory is the theory which helps to predict the behavior of an animal in relation to its search for food. The above scenario is an example of the Optimal Foraging Theory.

Generally, food will provide calories and energy to an animal but searching and hunting the food will require both time and energy. Therefore, in order the the animal might maximize its strength, it will choose foraging method that will ensure that it gets the most out out of foraging.

Hence, the Hawk will prefer to save energy, in order that it might maximize the total energy that will be gained from capturing fish near the shoreline.

gulaghasi [49]3 years ago
4 0

Answer:

The findings demonstrates an optimal foraging hypothesis based on maximizing caloric intake alone is probably incorrect in this case.

Explanation:

This example can also be explained by optimal foraging theory which helps in predicting the behavior of an animal which it is searching for food. Food provides energy to the animal but searching and capturing the food requires both energy and time.

So in order to maximize fitness , an animal adopts a foraging strategy which provides the most benefit which in this case is energy, for the lower cost and by maximizing the net energy gained.

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Ras is a GTP-binding protein that is often defective in cancer cells. A signal from a growth factor through a receptor tyrosine
Fynjy0 [20]

Answer:

Explanation:

A. Cancer cells are cancerous because they divide all the time. Normal cells stop dividing once there's enough of them but cancer cells divide when not required as well. Therefore, if Ras is mutated it will always be "on" which means it will activate the pathway which will lead to division of cells i.e. cells divide to multiply their numbers so more cells will be made. Normally, cells only multiply whne there's the growth factor present to activate the whole pathway, but since Ras is mutated it doesnt need the growth factor to activate the pathway, it automatically always activates the pathway even in absence of growth factor.

B. It is highly unlikely that the proposed drug will have a useful effect.  This is because mutant Ras protein of this type behaves as though it is constantly "on". Ras acts downstream of the receptor, i.e. first you have the reception of growth factor in receptor, then the ras gets activated. However, the activating mutation makes its effect felt (Ras is activated no matter if there's a growth factor or not), which is why mutant Ras is always active and no longer dependent on the receptor for activation.

Therefore, blocking the ability of the receptor to dimerize and activate Ras will probably not have an effect on cells containing the mutant Ras protein as it does not inhibit the activity of mutated Ras protein.

(Check out the Ras/Ref/MEK/Erk pathway for better understanding of how significant role Ras protein plays in cell proliferation i.e. division)

4 0
4 years ago
What is the maximum number of white blood cells allowed in a leukocyte-reduced unit of red blood cells?
SOVA2 [1]

Answer:

8

Explanation:

What is the number of white blood cells permitted in a unit of leukoreduced red cells? 8 g/dL owing to chemotherapy with a drug known to cause bone marrow depression and immunodeficiency.

4 0
2 years ago
During meiosis, homologous chromosomes exchange genetic material. This exchange of
weeeeeb [17]

Answer:

During meiosis, homologous chromosomes may exchange genetic material during a process called "crossing over."

5 0
3 years ago
Anyone know this? Not sure if my answer is right
emmasim [6.3K]
Your answer is right
7 0
3 years ago
Read 2 more answers
Why would an ecosystem be unable to sustain an increase in carnivores?
Tanzania [10]
A           because theres not enough prey to support it. 
This is why humans should have less kids and adopt if they want a kid. solves world hunger and overpopulation                                                                                
7 0
3 years ago
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