In flowering plants, eggs are to ovules as
A) sperm are to pollen.
B) sperm are to anthers.
C) pollen is to carpels.
D) pollen is to sepals.
A
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An example of a pathogen that undergoes rapid changes resulting in antigenic variation is _____
A) the influenza virus, which expresses alternative envelope proteins B) the strep bacteria, which can be transmitted from patient to patient with high efficiency C) human papilloma virus, which can remain latent for several years D) the causative agent of the autoimmune disease known as rheumatoid arthritis E) multiple sclerosis, which attacks the myelinated cells of the nervous system
How does the telomerase attach to the telomere area on the chromosome?
a. It is assisted by specialized helper enzymes. b. It has a built-in RNA template that binds to the end of the telomere. c. Telomerase cannot bind to the telomere. d. Primase builds an RNA primer to assist in binding telomerase to the telomere.
When one species actively prevents another from accessing a resource, it is called:
a. interference competition b. exploitative competition c. scavenging d. interspecific competition e. predation
Homeobox genes
A) encode proteins with a conserved sequence of amino acids. B) are important in development. C) are conserved in multicellular animals. D) are transcription factors. E) All of these