Double fertilization is a unique feature of flowering plants. In this process, one sperm unites with the egg to yield a zygote. The second sperm unites with the polar nuclei to initiate the formation of the

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#Question id: 18646

#Unit 13. Methods in Biology

Which of the following technique can be used to determine the separation of proteins according to size, and relative molecular mass of proteins.

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#Question id: 18982

#Unit 13. Methods in Biology

A number of convenient vector systems that incorporate both transcriptional and translational signals for the expression of cloned eukaryotic genes in E. coli have been developed. One such system is called expression vector is 

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#Question id: 3441

#Unit 11. Evolution and Behavior

Animals tend to maximize their energy intake-to-expenditure ratio. What is this behavior called?

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#Question id: 26803

#Unit 8. Inheritance Biology

In some sheep, the presence of beard is produced by an autosomal allele that is dominant in males and recessive in females. A beard female is crossed with a homozygous beardless male. One of the resulting F1 females is crossed with a beardless male. What proportion of the male and female progeny from this cross will have beard in F2 generation?

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#Question id: 28303

#Unit 5. Developmental Biology

Capacities of the sperm gain after capacitation involve__

a) CatSper calcium channels to sense calcium influx and monitor the direction of the current

b) recognizing the cues that will guide them to the egg

c) undergoing the acrosome reaction

d) fusing with the egg cell membrane