In primitive land plants, such as mosses and ferns, how does the sperm get to the egg?
What will be an ideal response?
The sperm must swim through a film or drop of water.
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Nucleic acid probes are NOT suitable for the detection of viruses
Indicate whether the statement is true or false.
In Thomas Hunt Morgan's experiments, males had white eyes but females did not. What cross could you perform with his flies to obtain white-eyed females?
A. cross the F1 offspring to each other. B. cross an F1 female to a white-eyed male. C. cross an F2 female with an F1 male. D. cross an F2 female with a white-eyed male. E. crossing either the F1 or F2 females with a white-eyed male will produce some white-eyed females.
The process through which cells can detect and respond to signals in their extracellular environment is _____.
A. Cell sensation B. Cell communication C. Transduction D. Reception E. Sensory response
The size of a population depends on its rates of births, deaths, __________, and __________. Fill in the blank(s) with the appropriate word(s)