Arabidopsis thaliana is a small angiosperm related to mustard that is commonly used in plant research experiments. In one experiment, an antifreeze protein from a species of bacteria was inserted into the genome of Arabidopsis thaliana, and the plants were exposed to freezing temperatures. Plants without the antifreeze protein had 90% mortality, while those with the antifreeze protein only had 20% mortality. What was the dependent variable in this experiment?
A. the bacteria
B. the temperature
C. Arabidopsis thaliana
D. the percent of the plants surviving
E. the presence or absence of the antifreeze proteins
D. the percent of the plants surviving
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Which of the following hormones does NOT promote growth of cells or tissues?
a. ADH b. growth hormone c. insulin-like growth factors d. thyroid hormones e. prolactin
Chondroblasts produce ________
Fill in the blank(s) with correct word
Require water Plants require water for transpiration, metabolism, and photosynthesis. How is water used in photosynthesis?
a) as a substrate for ATP synthase b) as an electron acceptor c) to combine with ADP forming ATP d) to combine with NADP+ to form NADPH e) as an electron donor
Which statement is correct about how carbon dioxide is carried in the bloodstream?
A. Carbon dioxide enters the bloodstream from the atmosphere. It then combines with water to form carbonic acid but most of it is carried in the form of bicarbonate. B. Carbon dioxide enters the bloodstream from the tissues. It then combines with hydrogen ions to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin. C. Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form bicarbonate ion but most of it is carried in the form of carbaminohemoglobin in the bloodstream. D. Carbon dioxide enters the bloodstream from the tissues. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate. E. Carbon dioxide enters the bloodstream from the atmosphere. It then combines with hemoglobin to form carbaminohemoglobin but most of it is carried in the form of bicarbonate.