Microbes that do not colonize the human host, but instead are lost rapidly are referred to as _____
Fill in the blank(s) with the appropriate word(s).
transient
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Answer the following statements true (T) or false (F)
1. A simple dot matrix is the best method to identify homologous sequences from a known sequence. 2. If a gene's sequence is compared among several different vertebrates and they are found to be 95% homologous, one can assume that the genes are derived from the same ancestral gene. 3. Sequences that are alike will produce a horizontal line in a dot matrix analysis. 4. The current genome databases are biased towards species that are important from a research, medical, or agricultural perspective.
What is the best description of double fertilization in angiosperms?
A. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the ovary, which becomes the fruit. B. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the endosperm. C. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the seed coat. D. One sperm fertilizes the egg, which develops into the embryo; the other sperm produces the pollen tube. E. One pollen grain fertilizes the embryo sac; the other sperm fertilizes the pollen grain.
How many different amino acids make up
proteins?
a. 4 b. 8 c. 12 d. 16 e. 20
The endomembrane system is composed of ____
a. microtubules, microfilaments, and intermediate filaments b. endoplasmic reticulum, Golgi apparatus, and peroxisomes c. vesicles, peroxisomes, and chloroplasts d. mitochondria, Golgi apparatus, and ribosomes e. plasma membrane, nuclear envelope, and thylakoid membranes