Which class of proteins are embedded in the phospholipid bilayer?
a. cytoskeletal proteins
b. integral proteins
c. transcription factor proteins
d. peripheral proteins
e. protein hormones
ANSWER: b
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Consider a plant where a multicellular generation is able to make both sperm and eggs. Which of the
following terms would describe such a plant?
a. homosporous b. bryophyte c. heterosporous d. lycophyte e. haploid/diploid
Tom Curtis wrote a letter in 2006 to try and
encourage research into a. rare plants. b. microorganisms. c. agricultural crops. d. prairie grasses. e. all of these.
In reabsorption,
a. plasma proteins are returned to the blood. b. excess hydrogen ions are removed from the blood. c. excess water is passed on to the urine. d. nutrients and salts are selectively returned to the blood. e. drugs and foreign substances are passed into the urine.
What is a difference between embryonic and adult stem cells?
A) The use of embryonic stem cells raises fewer ethical issues than the use of adult stem cells. B) Embryonic stem cells are undifferentiated; adult stem cells are partially differentiated. C) It is easier to obtain embryonic stem cells. D) Adult stem cells are easier to grow in culture.