Most sexually reproducing corals are brooders, broadcasting their sperm while retaining their eggs
Indicate whether the statement is true or false
false
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AT-rich DNA will denature/melt
A) at a higher temperature than GC-rich DNA. B) at a lower temperature than GC-rich DNA. C) usually at the same temperature as GC-rich DNA, with some minor variations. D) in accordance with the animal or plant from which it was taken.
The simple cuboidal cells found in kidney tubules have which function?
A. allow exchange of substances by diffusion and osmosis B. protect areas subject to abrasion C. secrete and absorb substances D. secrete hormones E. secrete and propel mucus
The symplast:a
greatly increases the surface area of the root. b. is a waterproof band surrounding the endodermis. c. directs the movement of water from one cell's cytoplasm to the next through plasmodesmata. d. secretes suberin, which waterproofs the cells. e. allows nutrient minerals to move against their concentration gradient.
During the preparation of a human genomic library, plasmids containing human DNA fragments are inserted into:a
compatible human cells. b. an antibiotic-resistant strain of E. coli to protect the inserted fragments. c. antibiotic-sensitive E. coli cells that become antibiotic-resistant if transformed. d. bacteriophages. e. mRNA molecules.