The best answer is D, birds.
For more information and details on the way a bird's respiratory system works:
https://asknature.org/strategy/air-flow-patterns-facilitate-efficient-gas-exchange/
Answer:
It is not usually a component of eukaryotic membranes.
Explanation:
Cholesterol is responsible for modulating the fluidity of the cell membranes of eukaryotes.
It is produced in most animal cells, and its formation is substantially active in <u>liver</u> cells, where bile acids are synthesized from cholesterol.
In addition, cholesterol is the precursor of steroid hormones such as progesterone, testosterone, estradiol and cortisol.
Cholesterol (like other lipids) is <u>amphipathic</u>, meaning it has a polar head (hydrophilic) and an apolar tail (hydrophobic).
Given the above, it can be concluded that the false statement is "it is not usually a component of eukaryotic membranes".
Answer:
The circulatory system of the crayfish is an open system where the blood is contained in vessels for only part of the system. The heart is located in a pericardial sinus located in the upper part of the thorax (a sinus is a sac or cavity). The heart pumps the blood into the arteries.
Explanation:
hope it will help you
The correct answer would be 4 I believe
Answer: A. neither can be accepted as correct because muscles growth is difficult to study in humans.
Explanation:
Hypertrophy can be defined as the increase in the fiber size of the muscle whereas the hyperplasia can be defined as the increase in the number of muscle fibers. Additionally the hypertrophy suggests that adding more proteins to the fibers is suggestive of the growth of the muscles. But these two theories cannot be directly related to the muscle growth in humans as the development and growth of muscles are dependent upon several factors like diet, any kind of disease which restrict the muscle growth and movement, physical activities, mineral availability responsible for growth, malnutrition, and others.
