Natural selection occurs to give help the best survival chance to the organisms.
Answer:
A number of complement proteins are proteases that are themselves ... factor D has no other substrate than factor B when bound to C3b. This means that factor
Explanation:
All the organic molecules produced by autotrophs CONTAINS ENERGY.
Autotrophs are plants that produce their own food using energy from the sun. Products produced by these autotrophs contain inherent energy which humans and animals absorb when they eat these products.
B--Condensation. <span>Condensation </span>is<span> responsible for the formation of </span><span>clouds,</span>
Answer:
The nucleus, cell membrane and cytoplasm.
Explanation:
The nucleus, cell membrane and cytoplasm are three elements that cannot be absent in a cell because they are necessary for the survival of the cell. The nucleus controls and regulates the activities happening inside the cell e.g. growth and metabolism etc. Cell membrane acts as a wall to protect the inner part of the cell from the external environment as well as allows nutrients and gases inside and outside the cell. Cytoplasm serves as a medium for the conduction of nutrients and waste from on place to another and also for the medium for organelles in which they floats.
