Which type of cell junction acts as anchors and distributes tension through a cellular sheet and reduces the chance of tearing when it is subjected to great mechanical stress?
A. tight junctions
B. connexons
C. gap junctions
D. desmosomes
Ans: D. desmosomes
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Primary growth in plants originates in
A. apical meristems. B. lateral meristems. C. vascular cambium. D. cork cambium. E. tracheids.
Which of the following plays an important role in screening out harmful ultraviolet rays?
A. atmospheric oxygen B. water C. methane D. ozone
How do the strands separate during PCR?
a. The primers separate the strands during the annealing step. b. The DNA polymerase breaks the hydrogen bonds between the two strands. c. The cycling of the temperatures breaks the hydrogen bonds between the two strands. d. The high heat of the denaturation step breaks the hydrogen bonds between the two strands.
the whole birth process
What will be an ideal response?