In human development, early divisions of the embryo are contained within the egg's outer membrane and thus upon each division, egg cytoplasm is partitioned into smaller and smaller cells which form the morula
A. true
B. false
A
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Diets that are high in proteins
a. can encourage kidney stone formation. b. can help protect against kidney stone formation. c. have no impact on kidney stone formation. d. can stress the kidneys. e. can encourage kidney stone formation and can stress the kidneys
In most eudicots, a short stalk called a ____ attaches the leaf to a stem
a. vascular bundle b. petiole c. node d. bundle sheath e. stomata
Cancer cells form in our bodies every day. How does the immune system destroy them?
A) Immune secretions, such as interferon, disrupt the DNA of the cancer cells. B) The immune system cannot destroy cancer cells. C) Fevers slow the replication of cancerous cells. D) Natural killer and cytotoxic T cells recognize the cancer cells as foreign and attack them. E) Antibodies attach to the cancer cells and then macrophages engulf them.
Why are stem cells important?
A) They have specialized DNA. B) They are incapable of becoming cancer cells. C) They have the potential to undergo cell division. D) They have the potential to develop into other cell types.