A virus's ability to infect an animal cell depends primarily upon the
A) host cell's ability to phagocytize viral particles.
B) presence of receptor sites on the cell membrane.
C) type of viral nucleic acid.
D) enzymatic activity of a host cell.
E) presence of pili on the host cell wall.
B
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True or False: Ecdysozoans include insects and make up more than half of all known animal species
A. true B. false
An outcome of asexual reproduction is
A. reduced genetic diversity in the offspring. B. increased genetic diversity in the offspring. C. reduced ability to reproduce. D. new gene combinations in the offspring.
The number of growing seasons that a plant survives is determined by two flower-inducing genes, LEAFY and Apetala 1. If scientists were to block these genes resulting in an annual plant to survive multiple growing seasons, how would this plant now be described?
A. perennial B. eudicot C. monocot D. vegetative
Answer the following questions true (T) or false (F)
1. Semen is the mixture of sperm and secretions from male reproductive glands. 2. As sperm are made, they travel through the vas deferens and are stored in the seminal vesicles until ejaculation. 3. Fallopian tube is another name for the uterine tube.