Based on the fossil record, which of the following structures likely evolved first as plants made the transition to land?
A. leaves
B. branches
C. roots
D. flowers
B
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________ refers to the removal of an amino group from an amino acid. One mechanism for this removal is ________, in which the amino group is transferred to an acceptor molecule.
A. Deamination; transamination B. Deamination; hydrolysis C. Transamination; deamination D. Hydrolysis; transamination
What are sensory receptors?
A) cells that create action potentials and thresholds B) localized areas of the CNS C) chemicals that cross a synapse between two nerve cells D) specialized neurons for detecting the world around you
Describe the similarities and differences between the comb jellies and cnidarians.
What will be an ideal response?
In Drosophila, sex is determined by a balance between the number of haploid sets of autosomes and the number of ________
A) X chromosomes B) telomeres C) nucleolar organizers D) Y chromosomes E) centromeres