Choose the correct match.

Germ layers specifying signals	Result
a.     If either Nodal or Vg1 signaling is blocked	i.               No ectoderm induction
b.     If vegT mRNA depleted	ii.              No endoderm induction
c.     If smad2 phosphorylation inhibited	iii.            No mesoderm induction
	iv.            Ectoderm only

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#Question id: 23107

#Unit 2. Cellular Organization

Choose the correct statement

a.The 30-nm fiber is further folded, results in 10000-fold compaction in euchromatin in interphase chromatin and in mitotic chromosomes to achieve an overall 10,00- fold compaction in euchromatin.

b.This 30-nm fiber is further folded, results in 1000-fold compaction in euchromatin in interphase chromatin and in mitotic chromosomes to achieve an overall 10,000- fold compaction in euchromatin.

c.Heterochromatin generally maintains 10,000-fold compaction in both interphase and mitosis after 30 nm.

d.Heterochromatin generally maintains 10,00-fold compaction in interphase and 10,000 folds in  mitosis after 30 nm.

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#Question id: 10842

#Unit 10. Ecological Principles

The number of species in a community is referred to as the

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#Question id: 21810

#Unit 12. Applied Biology

Which one of the following sensors uses sweat or saliva to gain information?

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#Question id: 17994

#Unit 8. Inheritance Biology

Consider a heritable autosomal disease with an incidence in the population of 1 per thousand. On average, individuals with the disease have 80% as many children as the population average. In answering the various parts of this question, assume that mating is random. What mutation rate would be required to maintain the observed incidence of the disease in the population if the disease is dominant?

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#Question id: 4771

#Unit 8. Inheritance Biology

The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as follows:

Are genes for eye color and wing length x link or autosome?