Of the 23 pairs of human chromosomes, 22 pairs are homologous and are found in both males and females. These are called ________.
A. autosomes
B. recombinant chromosomes
C. bivalents
D. somatic chromosomes
Answer: A
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In a haploid dominant species
A. the multicellular organism is diploid and the gametes are haploid. B. the multicellular organism is haploid and the gametes are diploid. C. diploid cells are produced by mitosis and haploid cells are produced by meiosis. D. the zygote is haploid. E. the multicellular organism is haploid and the zygote is diploid.
An organelle that is a stack of flattened, membranous sacs and functions to receive, modify, and package proteins for cell secretion is the
A. chloroplasts. B. Golgi apparatus. C. mitochondria. D. endoplasmic reticulum. E. lysosomes.
During convergent extension,
A) cells on the opposite side of the embryo follow converging developmental pathways leading to bilateral symmetry. B) the cells of the neural folds adhere to one another to complete the neural tube. C) the cells of a tissue layer reorganize, forming a narrowed, elongated sheet. D) the dorsal-ventral axis is established. E) cell adhesion molecules are expressed, causing the eight blastomeres to adhere tightly to one another.
What are four ways that mRNA can be modified?
What will be an ideal response?