Early in the development of a plant, a mutation in cpDNA removes a specific BgIII restriction site (B) In this species cpDNA is inherited maternally. Seeds from the plant are grown, and the resulting progeny plants are sampled for cpDNA. The cpDNAs are cut with BgIII, and Southern blots are hybridized with the probe P shown. The autoradiograms show three patterns of hybridization:

Which of the following is correct about plant of seed?

a. plant of seed 1 having only mutated chloroplast

b- Plant of seed 2 having only normal chloroplast

c- Plant of seed 3 having only normal chloroplast

d- Plant of seed 3 having both normal and mutant chloroplast

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#Question id: 2830

#Unit 2. Cellular Organization

The NtrC protein from E. coli

a. is a σ54 RNA polymerase.             

b. stimulates transcription of the glnA gene.

c. is activated by a protein kinase called NtrB.

d. binds both to an enhancer site upstream of the glnA gene and to RNA polymerase.

e. has ATPase activity.

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#Question id: 10623

#Unit 10. Ecological Principles

What is the population growth per unit of time when r = 0.50, N = 100 and K = 1000. What is value of per capita growth rate when population growing at maximum rate?

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#Question id: 4700

#Unit 11. Evolution and Behavior

Which of the following is not an observation or inference on which natural selection is based?

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#Question id: 10866

#Unit 10. Ecological Principles

A form of competition, found in desert shrubs and sponges, in which one organism releases a chemical into the environment that inhibits another, is referred to as

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#Question id: 2596

#Unit 2. Cellular Organization

The correct order of events in cell locomotion is: