The pushing out of neural crest cells from the dorsal neural tube appears to be facilitated by fellow neural crest cells. The phenomenon known as:

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#Question id: 18083

#Unit 8. Inheritance Biology

The interaction of selection and inbreeding in determining the incidence of autosomal recessive diseases. Consider a gene in which recessive mutations occur at a rate of 10^-5. Assume a selective disadvantage S of 0.4 in homozygotes for the recessive allele. Would q be expected to rise, fall, or remain unchanged during the first 10 generations after the cessation of inbreeding, Briefly justify your answer. What numerical value would q approach after thousands of generations with no inbreeding?

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#Question id: 18087

#Unit 13. Methods in Biology

Each of five questions on a multiple-choice examination has four choices, only one of which is correct. The student is attempting to guess the answers. The random variable X is the number of questions answer correctly. Probability that the student will get

Exactly three correct answers

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#Question id: 18088

#Unit 13. Methods in Biology

If a coin is tossed 5 times, then consider the following statements:

I: Probability of getting exactly 2 heads is 5/16.

II: Probability of getting at least 4 heads is 3/16.

III: Probability of getting at most 2 heads is 5/8.

Which one of the following is correct in respect of the above statements

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#Question id: 18219

#Unit 1. Molecules and their Interaction Relevant to Biology

Pseudoknot loop refers to 

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#Question id: 18221

#Unit 9. Diversity of Life Forms

In animal cells and in the meristem cells of land plants, the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protists and fungi. According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants? 

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#Question id: 18222

#Unit 9. Diversity of Life Forms

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial?