Which of the following terms refers to a permanent change to dna or rna that is typically caused by damaged or changed bases?

a. phenotype
b. mutation
c. protein
d. translation

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

sorry, but you do not have posted the diagram.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )