Which of the following statements is true of the seeds of both gymnosperms and angiosperms? Select all correct choices
A. Seeds from both plants contain a triploid
(3n) endosperm.
B. Seeds from both plants contain a diploid
(2n) embryo.
C. Seeds from both plants contain a diploid
(2n) seed coat.
D. Seeds from both plants contain a haploid
(1n) male gametophyte.
B,C
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A paper cut can allow bacteria to enter your tissue because it disrupts __________
What will be an ideal response?
The sacral vertebrae are anterior to the thoracic vertebrae
a. true b. false
A mutated version of a virus that cannot disable the p53 gene can be used to
a. kill cancer cells. b. repair defective genes. c. turn off signal cascades. d. turn off the host cell’s enzymatic activities.
How do the secreted antibodies from a plasma cell differ from the cell-surface antibodies of a memory cell?
A. in the specificity of the hypervariable domain B. by the absence of a hydrophobic domain in the constant region C. through the removal of the constant region D. by the absence of a hydrophilic domain in the constant region