Which species is a hermaphrodite?
a. hydra
b. banana slugs
c. chameleon
d. sharks
e. pigeons
ANSWER: b
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A pathogen is
(a) a disease. (b) an organism that causes a disease. (c) a substance that kills bacteria. (d) the same as a heterocyst.
Fossils may be
A. formed when plant resin or tar preserves the specimen. B. formed when organic matter is replaced by minerals, turning to stone. C. All of the answer choices are correct. D. from impressions left after an organism decays. E. casts from footprints that have filled with mud and then turned to stone.
The detection of an enzyme called ________ in a cell is an indicator that the cell may be cancerous because it is rarely present in normal cells
Fill in the blank(s) with correct word
Describe the structure of an atom, and include how the number of electrons in the outer shell will affect an atom's tendency to interact with other atoms.
What will be an ideal response?