Answer:
Explanation:
Meiosis is a special type of cell division of germ cells in sexually-reproducing organisms used to produce the gametes, such as sperm or egg cells. It involves two rounds of division that ultimately result in four cells with only one copy of each paternal and maternal chromosome.
The answer is A I just did this problem
Answer:
C. Promoter; Operator
Explanation:
Related genes in bacteria are often found in a cluster on the chromosome, where they are transcribed from one RNA polymerase binding site(promoter) as a single unit while other regulatory proteins are binding repressors attached to DNA pieces known as operators. When they are bound to operator, a repressor reduces transcription.
Genes in cases like this encode proteins, having various roles which include fuel metabolism, maintenance of cell structure, and
also defense against viruses in its process. A great number of these proteins are been used while others are needed only under certain decrees. Therefore, it is said that cells don't express all the genes in their genome always.
<span>The nervous system has numerous functions including the perception, reception and processing of sensory stimuli, control of the reflexes, voluntary and involuntary motor functions and responses, autonomic muscle functions, homeostatic mechanisms, and relay of motor responses to different parts of the body.</span>
