In which stage of mitosis does exchange of genetic material between chromosomes (crossing over) occur?

A) prophase II B) prophase I C) anaphase I D) none of the above


Answer: D

Biology & Microbiology

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Which of the following statements about the first animals to show cephalization is false?

A. These animals were triploblastic. B. These animals are placed in the group Lophotrochozoa. C. These animals were in phylum Platyhelminthes. D. These animals followed the protostome pattern of embryonic development. E. These animals had a proboscis

Biology & Microbiology

Which feature is used to distinguish modern humans?

What will be an ideal response?

Biology & Microbiology

How many different types of chemoreceptors can be found in the taste buds?

A. hundreds B. thousands C. 40-50 D. five

Biology & Microbiology

If the DNA nucleotides read ATG-CGT-GAC, the

amino acid sequence of the resulting polypeptide would be a. tyrosine – alanine – leucine. b. methionine – arginine – asparagines. c. histidine – glycine – praline. d. serine – lysine – glycine. e. all of these.

Biology & Microbiology