Explain how sexual reproduction leads to genetic variation. What is the evolutionary significance of this variation?
What will be an ideal response?
The best responses will include discussions of the following ideas: Crossing-over, independent assortment, and random sperm and egg combinations and how they contribute to genetic recombination. The answer to the second question should include discussions of variations within population and selective advantage – a better chance to survive and reproduce.
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A population bottleneck...
a. Results from a severe decrease (in) population size. b. Can lead to increase in inbreeding. c. Can occur from a disease or natural disaster. d. Can lead to a decrease in gene diversity within a population. e. Includes all of the above.
The branch of biology that classifies organisms is called ____
a. natural history b. taxonomy c. evolution d. morphology e. paleobiology
A genetic condition in which abnormal hemoglobin forms, red blood cells become crescent shaped, and cells get stuck together is called ________
Fill in the blank(s) with correct word
Classification.Answer the following questions in reference to the five plant tissues listed below.
A. tissue involved with storage of proteins, water, oils, and starch B. tissue containing cells with pectin on their primary walls C. part of ground tissue, sometimes containing lignin that strengthens the adult plant D. vascular tissue that conducts water and mineral ions throughout a plant E. vascular tissue that conducts and distributes food to plant cells