An organ is made up of
a. a single type of tissue.
b. glandular tissue.
c. 2 or more tissues working together to
perform a specific task.
d. muscle tissue that has differentiated from
stem cells.
e. none of these.
C
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Through studies of insect Malpighian tubules, researchers found that K+ accumulated on the inner face of the tubule, against its concentration gradient. What can you infer about the mechanism of transport?
A) Potassium transport is a passive process. B) Movement of potassium into the lumen of the Malpighian tubules is an energy-requiring process. C) Potassium moves out of the tubules at a faster rate than it moves into the lumen of the tubules. D) Sodium ions will follow potassium ions.
A cross of a true-breeding smooth pod and yellow pod plants results in all smooth pod offspring. This indicates that
A. yellow is dominant and smooth is recessive. B. smooth is dominant and yellow is recessive. C. yellow and smooth are not alleles. D. yellow and smooth are variants of the same gene. E. two of the answers are correct. Yellow and smooth are variants of the same gene, and smooth is the dominant trait.
An example of an ectotherm is a(n) ____
a. elephant b. lizard c. owl d. bat e. human
The use of microbes to remove pollutants from a contaminated system is called ________.
Fill in the blank(s) with the appropriate word(s).