Two eukaryotic proteins have one domain in common but are otherwise very different. which of the following processes is the most likely to have contributed to this similarity?
a) exon shuffling
b) gene duplication
c) histone modifications
d) random point mutations

A) exon shuffling

Explanation:

Exon shuffling refers to the process of evolution of a new gene that consists of unique combinations of preexisting exons. These novel combinations of preexisting exons are formed when the interspersed repeats of introns of two different genes undergo the process of recombination.

The process of exon reshuffling is responsible for the presence of common domains between two otherwise different proteins of eukaryotes.

Example: Tissue plasminogen activator and epidermal growth factor are very different proteins but share the EGF domain.

there is no stairs in bungalow

explanation:

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"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."