In Mendel's pea plants, yellow was dominant over green for the seed color gene. If an offspring from a mating of a true-breeding yellow seeded plant and a green seeded plant was bred with a green seeded plant, what would be the expected percentage of yellow seeded plants in this next generation?
a) 0%
b) 25%
c) 50%
d) 100%
Ans: c) 50%
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What is the result of successful communication between rhizobia and their plant hosts?
A. Rhizobia consume the plant tissue as an energy and carbon source, causing disease in the plant. B. The plant supplies organic forms of nitrogen to the rhizobia. C. The plant consumes rhizobiaas an energy source and carbon, destroying the invading bacteria. D. The rhizobia invade the plant root and begin to fix nitrogen with the assistance of the plant.
These antibodies stay attached to the B cell's plasma membrane and serve as receptors for binding with antigen or complement
a. IgA b. IgG c. IgM d. IgE e. Both IgE and IgA
Which is an example of a species with K-selected adaptations?
A. dandelion B. fruit fly C. herring D. bobcat
In which of the following ways are archaeans
similar to eukaryotic cells? a. size b. shape c. presence of histones d. DNA polymerases e. presence of operons