How does primary growth occur at a terminal bud?
What will be an ideal response?
A mass of apical meristem lies just below the surface of the bud. Cells at the center of the mass are completely undifferentiated, and they divide continually during the growing season. The divisions push some of the cells toward the edge of the mass. Cells that are displaced away from the center of the meristem begin to differentiate. The shoot grows longer mainly because differentiating cells under the mass of meristem elongate as they take on their specialized functions. The apical meristem remains at the tip of the lengthening shoot, continually renewing itself and also producing cells that divide and differentiate below it.
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When antibodies bind antigens, the clumping of antigens results from _____
A) the antibody having at least two binding regions B) disulfide bridges between the antigens C) a complement that makes the affected cells sticky D) bonds between class I and class II MHC molecules E) denaturation of the antibodies
Which of the following organisms is not normally found on the skin?
A. Staphylococci B. Diptheroids C. Candida spp. D. Malassezia spp.
The length of monkey flower leaves is inherited as an incomplete dominant trait. When long leaves are crossed with short leaves a third phenotype, intermediate leaves, is produced. A plant breeder crosses two monkey flowers. The resultant offspring are 58 intermediate and 52 short-leafed plants. What are the phenotypes of the parent monkey flowers? Explain your answer
What will be an ideal response?
The AT3 protein that Harry Meade was working with
a. is important to aid in clot formation. b. has never been cloned. c. can prevent blood clots from forming. d. is found only in sheep. e. is produced in the salivary glands.