All of these are not part of the life cycle. It's man-made. Think of it in biology terms - something that's created genetically.
Chromatin is the threadlike form of genetic material in the nucleus.
(chromatin coils around histone proteins and form chromosomes when mitosis/meiosis are going to occur)
Answer: sponges are the cleaners of the water around the corals , coral feeders , and healers in a sens
Explanation:
Answer:
Genetic variability refers to a species's genetic variation as a whole. Specific changes in DNA fragments or genes are referred to as genetic variants, and each mutation of a gene is referred to as an allele.
Explanation:
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The nervous system communicates through electrical impulses and the communication is very fast. It works in a relay fashion, from point to point comparable to the way the old telephones systems used to work.
The endocrine system communicates by chemical signals via the bloodstream. Hormones are secreted into the blood and extra cellular fluids, then transported to target cells, which must bear a receptor to be able to bind to a specific hormone, and respond.
Hormones are chemical messengers secreted into blood or extracellular fluid that affect the function of other cells.
Endocrine communication is not quite as fast as the nervous system communication
