In the chemical equation for burning methane (CH4 + O2 ? CO2 + H2O), CH4 and O2 are the _____ and CO2 and H2O are the _____.
A) molecules; atoms
B) reactants; products
C) products; reactants
D) anions; cations
B) reactants; products
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What are the sensory structures that enable invertebrates to determine the orientation of the body with respect to gravity called?
A. carotid bodies B. statocysts C. Ruffini endings D. baroreceptors E. interoceptors
When does the segregation of alleles occur?
A) Homologous chromosomes separate during meiosis. B) Homologous chromosomes separate during mitosis. C) Sister chromatids separate during meiosis. D) Sister chromatids separate during mitosis.
Crossing over in prophase I and ________ in metaphase I increase the genetic variation from one generation to another
Fill in the blank(s) with correct word
How are Cryptosporidium sporozoites able to evade the immune system?
A) They attach to host cells and build a protective membrane from modified host cell membrane materials. B) Special proteins bind and inhibit antibodies from adhering to them. C) They escape from phagocytes. D) They reside inside the host cells. E) They evade phagocytosis by using a capsule.