A, the cytoplasm is the jelly-like substance that suspends the organelles and provides structure for the cell.
Answer:
DNA tightly coils around proteins and condenses into chromosomes, which fit in the nucleus.
Answer:
B.
Explanation:
Air takes up space it is just super light therefore it is matter
:)
Red and White blood cells:
These are produced by the stem cells in the bone marrow. There are two types of stem cells for producing white blood cells - Myeloid stem cells (producing phagocytes such as neutrophils and monocytes - the undeveloped version of macrophages) and Lymphoid stem cells (responsible for production of lymphocytes such as B and T cells).
In natural selection, genotype variations that will increase the chance of survival and reproduction of some organism are preserved and will be inherited. If there is no variation, then all individuals have the same chance to survive and nothing will be particularly selected.
