In plants, parenchyma cells typically secrete which of the following?
a. resins
b. water
c. starch grains
d. oil droplets
e. salts
a
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Photosynthetic organisms serve as the base for most food chains in the biosphere.
Answer the following statement true (T) or false (F)
Which are limitations of preimplantation embryo diagnosis? (Select all that apply.)
A) The technique is technologically complex and expensive. B) Only certain well-defined genetic diseases can be tested. C) The test increases the rate of twin births. D) Removal of one cell from an eight-cell embryo results in permanent damage to the embryo.
Antibody testing requires
A. only a known antigen. B. only a known antibody. C. both a known antigen and a known antibody. D. either a known antigen or a known antibody.
Duplicated chromosomes linked together at their centromeres at the beginning of meiosis are appropriately called what kind of chromatids?
A. Mother B. Parallel C. Sister D. Homogenous E. Haploid