Antheridia are structures that produce ________
Fill in the blank(s) with correct word
sperm
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Which one of the following is the photosensitive protein that converts the energy of photons into electrical signals in the receptor cell?
A. opsin B. retinal C. chlorophyll D. organ of Corti
People with giant axons lose the ability to move and see because
A) apoptosis in their body rapidly and neatly dismantles cells into membrane-enclosed pieces that a phagocyte can mop up. B) they lack a protein, called gigaxonin, which normally breaks down intermediate filaments and recycles their components. C) they have an excess of CFTR proteins, which entrap salt inside cells. D) their hemoglobin leaks out of the cells of the body.
The two hormones involved in seed germination and seed dormancy are
A) auxin and ethylene. B) gibberellin and auxin. C) ethylene and cytokinin. D) abscisic acid and gibberellin. E) cytokinin and auxin.
Cystic Firbrosis is a homozygous recessive condition. A genetic counselor should advise concerned parents that, if each of them has a parent who has cystic fibrosis yet neither of the concerned parents is affected, the probability of their potential child having cystic fibrosis is
a) 0% b) 25 % c) 50% d) 100%