Crossing over occurs at the four-strand stage when two homologous chromosomes, each consisting of a pair of sister chromatids, are paired. Each crossover involves just two of the four strands and generates two recombinant strands.
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A cell theory.
Since cells are the basic unit of structure in all organisms and also the basic unit of reproduction.
answer:
plasma membrane a microscopic membrane of lipids and proteins which forms the external boundary of the cytoplasm of a cell or in closes a vacuole, and regulates the passage of molecules in and out of the cytoplasm
answer number 2
the plasma membrane or cell membrane, is the phospholipid layer that surrounds the cell and protects it from outside environment.
you can use either answer if you have to type or write an answer
Matrix
Metalloproteases (MMPs) are a part of metalloproteinase enzymes family playing
an vital part in healing wounds such as physiological or pathological processes
and even in morphogenesis, reproduction, embryonic development, tissue
remodeling, arthritis, cancer and cardiovascular disease. MMPs are a product by
activated inflammatory cells (neutrophils and macrophages) and wound cells
(epithelial cells, fibroblasts and vascular endothelial cells).
<span>Membrane-Type
MMPs (MT-MMPs) is a subgroup of MMPs which is helpful in breaking down of
extracellular material as well as in handling of biological molecules varieties. </span>
Answer:
D
Explanation:
This is because food is needed in the border in order to supply adequate food and oxygen to the growth cells to stimulate proper growth and development, to repair worn out tissues and cells and also to aid in some sort of cell division which leads to growth
