During a scientific experiment, the control group is used to directly test or measure the consequences of a variable in the study.

Answer the following statement true (T) or false (F)


False

Biology & Microbiology

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The loading of dissolved sugars into the sieve tube elements of phloem is:

a. passive transport. b. active transport. c. osmosis. d. simple diffusion. e. facilitated diffusion.

Biology & Microbiology

What conclusions are consistent with these data? (Select all that apply.)

A researcher is studying the rII locus of phage T4. Three rII- strains are obtained: A, B, C, and D. In the first experiment, E. coli strain K(?) is coinfected with two rII- strains simultaneously and the results are recorded. Infection with A and B phage = plaques form Infection with A and C phage = plaques form Infection with B and C phage = no plaques form Infection with B and D phage = no plaques form Infection with C and D phage = no plaques form In a second experiment, coinfections are performed first in E. coli strain B, then the progeny phage are used to infect E. coli strain K(?). Progeny of A and B phage = plaques form Progeny of B and C phage = plaques form Progeny of C and D phage = plaques form Progeny of B and D phage = no plaques from A) Strains B and D both carry the same mutation. B) Strains B, C, and D carry mutations in the same gene. C) Strain A carries a mutation in a different gene than strains B, C, and D. D) Strains A and B carry mutations in the same gene. E) Strains B and C both carry the same mutation. F) A, B, C, and D carry mutations in the same gene.

Biology & Microbiology

What gas do plants release during photorespiration?

A) water vapor B) oxygen C) carbon dioxide D) carbon monoxide

Biology & Microbiology

The theory illustrated in Figure 21-1 is supported by which piece of additional evidence?


a. The results of the Miller-Urey experiment.
b. Burgess shale fossils.
c. Ediacarian fossils.
d. The presence of DNA in some organelles.
e. All answers support the illustrated theory

Biology & Microbiology