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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

Describe the similarities and differences between the comb jellies and cnidarians.

What will be an ideal response?

Biology & Microbiology

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

Biology & Microbiology