<h2>Question:-</h2><h3> Which structure is found in all animal cells?</h3>
<h2>Answer :- Centrioles </h2>
<h2>Explanation:- </h2>
- They are barrel shaped cell organelles only found in animal cell
- There function is to help in division of cell membrane by forming microtubules which help in division of chromosomes ( spindle fibres)
- They play role in arranging microtubules which act as endoskeleton of the cell
- They also help in formation of cell structure like cilia and filaments
Answer:
(A) speciation.
Explanation:
Shrinking of water bodies and development of deserts since the Pleistocene ice age produced new vacant niches that could be inhabited by organisms such as fishes. Production of new isolated streams, ponds, and springs allowed the fishes to occupy these new water bodies. Accumulation of genetic variations to become adapted to their new habitat resulted in the evolution of several new species of fishes with many different genetic traits. This represents speciation due to geographical isolation.
It has been known that the greatest cause of muscle atrophy is lack of physical activity, that contributes to your muscle to waste away. This can possibly happen when you accidentally injured yourself or might have a certain disease that makes it for you difficult or to move your body as well.
Answer: The hydrophilic tails are directed inward and the hydrophobic heads are directed outwards.
Explanation:
A phospholipid is made up of two ends a hydrophilic or water-loving end that is phosphate head and a hydrophobic tail that is made up of fatty acid tail. The arrangement of phospholipid in a bilayer structure allows the entry of oxygen, carbon dioxide, and lipids to pass through them via concentration gradient via simple diffusion.
Answer:
The member of the Mytai Lisgrogeous population which is most evolutionarily fit is the one which has the successes rate at reproduction.
Evolutionary fitness has been defined by evolutionary biologists as the ability to successfully adapt and reproduce regardless of the environment.
Explanation:
In the case of the Mytai Lisgorgeous, which is a species of bird found in the Amazon Forest, the males come in two variants:
- those that are very bright and colorful with very long tails and
- those with stubby tails and are of a drab brown color
The argument/question is based on observable phenomena which reveal that, while on one hand, the more colourful ones are more prone to predation than the other group with less plumage, on the other, the birds will a drab colour are less successful at reproduction as the female species of the birds prefer the brightly hued males.
So the logic behind the definition of fitness here is this, it holds no biological value if the members of a species have evolved to the point where they are no longer prone to predation if they cannot reproduce.
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