The first shell in any atom contains one orbital which may contain as many as:
A. 8 protons
B. 4 neutrons
C. 8 electrons
D. 2 neutrons
E. 2 electrons
Answer: E
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Dogs use panting to dissipate excess heat. What part of their brain detects the need for this response and sends the signal to pant?
A. hippocampus B. prefrontal cortex C. amygdala D. hypothalamus
Consider the following hypothetical situation. Researchers doing influenza surveillance involving molecular analysis of recent isolates of the virus notice a major change in the H and N antigens. What is a likely outcome?
A. The number of cases of influenza will increase significantly. B. The number of cases of influenza will decrease significantly. C. There will be no significant change in the number of cases of influenza.
In a polygenic trait
A) within genes, all alleles affect the phenotype to the same degree. B) all alleles are dominant. C) genes contribute to varying degrees, and alleles have differing degrees of impact. D) one gene can cancel out the effect of the environment.
Many algal species have life cycles consisting of alternating haploid and diploid generations. The most
common life cycle in brown algae consists of organisms that are
a. unicellular in the haploid stage and multicellular in the diploid stage. b. multicellular in the haploid stage and unicellular in the diploid stage. c. unicellular in both the haploid and diploid stages. d. multicellular in both the haploid and diploid stages. e. colonial in both the haploid and diploid stages.