The raw materials of science are:
A) hunches.
B) theories.
C) predictions.
D) observations.
E) hypotheses.
D) observations.
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Answer the following statements true (T) or false (F)
1) Two genes are considered linked when there are more F2 progeny with recombinant genotypes than parental genotypes in the offspring of a dihybrid testcross. 2) Chiasmata are structures that show where recombination occurred between sister chromatids. 3) Chiasmata can be seen through a light microscope and are sites of recombination. 4) A linkage group includes all of the genes on a chromosome, including genes that are so far apart from each other on a chromosome that they assort independently during meiosis. 5) The hypothesis that predicts no linkage between genes is known as the null hypothesis.
Molting in arthropods involves primarily a change in:
a. sex b. body size c. eating habits d. sensory structures e. larval to adult stages
The most common infectious cause of death worldwide is
A. HIV/AIDS. B. heart disease. C. stroke. D. cancer. E. malaria.
Which of the following statements regarding mitosis and meiosis is CORRECT? Select ALL that apply.
A. Mitosis only occurs in prokaryotes, including all bacteria, while meiosis occurs in higher life forms B. In the human body, mitosis occurs in somatic cells while meiosis occurs in sex cells C. None of the other answer choices are correct D. Mitosis results in higher genetic variability than meiosis