The discovery of ________ explains embryonic pattern formation in a wide variety of organisms
A) the three-dimensional forms of animals
B) gastrulation
C) homeotic genes
D) programmed cell death
Answer: C
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The slender, rootlike structures found in nonvascular plants are called ____
a. thalli b. rhizomes c. gametangia d. protonema e. rhizoids
Some tRNA often contains sections of noncomplementary, unusual bases (i.e., other than U, C, A, and G), which are added after transcription. What area of the tRNA would never contain such odd bases in a living organism?
What will be an ideal response?
Which the following does not occur in the egg following fertilization?
a. Meiosis II is completed. b. Microtubules are formed. c. Calcium concentrations increase. d. The acrosomal reaction occurs. e. The cortical reaction occurs
You have been asked to synthesize a new isotope for cadmium. Which part of the original atom would you need to manipulate in order to create an isotope?
A. Neutrons. B. Protons. C. Protons and neutrons. D. Electrons.