If development of the shoot apical meristem failed in a bean embryo, which tissues would still be able to form? (Check all that apply.)A) CotyledonsB) LeavesC) RootD) StemE) Suspensor
What will be an ideal response?
A, C, E
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Apoptosis
A. is a form of cell suicide. B. is induced in target cells by effector T cytotoxic cells. C. results in T cell death. D. refers to the transformation of B cells into plasma cells. E. is a form of cell suicide AND is induced in target cells by effector T cytotoxic cells.
Which of the following is(are) fixed action
pattern(s)? a. A baby garter snake captures and eats a slug. b. A chick’s gaping mouth induces a feeding response in a parent bird. c. A European cuckoo hatchling pushes the host bird's egg out of the nest. d. A male fruit fly waves his wings at a female fruit fly during courtship. e. All of these are fixed action patterns
Biochemist Erwin Chargaff found that in DNA there was a special relationship between individual bases that we now refer to as Chargaff's rule. His observation was that
A. A + T = C + G. B. C = T and A = G. C. A = T and G = C. D. G = T and C = A.
You are asked to give a classroom demonstration of DNA supercoiling. To do so, you take two different colored pieces of rubber tubing, twist them very tightly and excessively around each other and join the ends of the tubing appropriately. Next, you relieve the supercoiling by breaking one strand and unwinding it. In this demonstration, the breaking and unwinding to relieve the supercoiling simulates the action of
A. ligases. B. primases. C. topoisomerases. D. polymerases. E. exonucleases.