Actin bundles give shape and support to ________ found in intestinal mucosal cells
A) cilia
B) flagella
C) microvilli
D) nuclei
E) lamellipodia
Answer: C
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Homeotic genes generally control
a. X chromosome inactivation. b. the formation of a specific body part. c. hormone synthesis. d. dosage compensation. e. DNA methylation.
A signaling molecule that interacts with
phytochrome to influence flowering is produced in a. roots. b. leaves. c. the stem. d. flowers. e. petioles.
Answer the following questions true (T) or false (F)
1. B cell receptors are specific to only one antigen. 2. Antibodies may help phagocytes grab and ingest bacteria. 3. Smallpox vaccines used today are heat-killed cowpox viruses.
Which is NOT a difference between bacteriophages and animal viruses?
a. Many animal viruses are enveloped. b. Many animal viruses replicate their genome within their host cell’s nucleus. c. Animal viruses are classified by their genome. d. The entire virion of animal viruses enters the host cell.