What is the significance of the acrosomal and cortical reaction?
What will be an ideal response?
Both prevent more than one sperm from fertilizing an egg. The acrosomal reaction is a fast block to
polyspermy while the cortical reaction is a slow block to polypermy.
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Select the best response to the question. ? ?Chlamydia's long incubation period, (7-21 days between exposure and becoming symptomatic) contributes to what clinical concern?
A) the development of resistant strains of the disease B) more intense signs and symptoms C) difficulty identifying the specific pathogen causing the disease D) a large number of asymptomatic individuals who continue to spread the disease
The breast cancer gene BRCA1 has a very similar sequence in humans, mice, and gorillas, due to its origination in a common ancestor. The BRCA1 genes in these species are examples of ________.
A. synteny B. paralogs C. orthologs D. polyploidy
Neural crest cell originates from dorsal part of (i)________________. It migrates by undergoing (ii)________________ , followed by differentiation.
a) (i) neural plate, (ii) Epithelial-Mesenchymal Transition b) (i) neural tube, (ii) Epithelial-Mesenchymal Transition c) (i) neural plate, (ii) Mesenchymal-Epithelial Transition d) (i) neural tube, (ii) Mesenchymal-Epithelial Transition
The type of exercise that creates new blood vessels and makes the heart pump more efficiently is ________
Fill in the blank(s) with correct word