The walls of adjacent plant cells are held together by the ____
a. secondary cell wall
b. cell membrane
c. primary cell wall
d. middle lamella
e. plasmodesmata
ANSWER: d
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All of the following are ways to determine the function of annotated genes except
a. looking for similar gene sequences of known function b. examining the putative protein structure c. gene knockout experiments d. gene knockdown experiments e. finding a pseudogene for that gene
Plant tissue specialized for conducting fluids is
a. ground tissue. b. protoderm. c. vascular tissue. d. meristem. e. dermal tissue.
Why are respiratory systems necessary for complex, multicellular organisms?
What will be an ideal response?
A mad scientist decides to start combining embryos and see what develops. He takes cells from the blastula of a frog with blue skin and transplants them into the blastula of a yellow-skinned frog
The embryo receiving the cells develops blue cells in its brain and spinal cord. The scientist must have transplanted the cells into the ________ of the recipient embryo. A) allantois B) yolk sac C) ectoderm D) mesoderm E) endoderm