The above figure represents
a. petunia eggs.
b. pine pollen.
c. pansy spores.
d. petal fragments.
e. poppy seeds
B
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What must happen to amino acids before they can be used in catabolic reactions?
A. They must be decarboxylated B. They must be deoxygenated C. They must be dehydrogenated D. They must be deaminated
What two structures result from double fertilization?
a. Eggs and sperm b. Zygote and flower c. Flower and egg d. Endosperm and zygote e. Eggs and endosperm
If an atom has the atomic number 11 and the atomic mass 22.99, it will have
A. 1 electron in the third energy level. B. 1 electron in the second energy level. C. 3 electrons in the fourth energy level. D. 1 electron in the first energy level.
Monoclonal antibodies
A. are secreted by hybridomas. B. are used in immunology lab tests and cancer therapy. C. originate from a single B-cell clone. D. have a single specificity for antigen. E. All of these choices are correct.