Which of the following is ABSENT in the charophyte ancestors of land plants?
a. spores
b. gametes
c. multicellular organs
d. diploid embryos
e. chlorophyll b
D
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A(n) ________ is a chemical that can be used to sterilize materials.
A. disinfectant B. antiseptic C. oxidant D. sterilant
Use of microbial enzymes for bioconversion reactions is preferred because alternative chemical synthesis requires harsh manufacturing conditions.
Answer the following statement true (T) or false (F)
Within an organism, all cells have the same ____, whereas different cell types contain different ____
a. RNA; genes b. protein; RNA c. genes; proteins d. RNA; protein e. proteins; genes
The skin plays a key role in thermoregulation, or the regulation of body temperature. Which structures are involved in this process?
The sebaceous glands Dermal blood vessels and sweat glands Melanin, sebum, and keratin All of the above