A population with zero growth is indicated by

a. A.
b. B.
c. C.
d. D.
e. none of these


C

Biology & Microbiology

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What kind of signaling is it when nerve cells interact across a synapse?

a. endocrine b. autocrine c. paracrine d. direct signal across gap junctions

Biology & Microbiology

Using the CRISPR/Cas9 system, a genetically-engineered sgRNA complementary to a target site in the genome binds to Cas9 endonuclease. A mutation can occur at this site when

A) Cas9 cleaves the DNA and nonhomologous end-joining results in a small deletion. B) Cas9 cleaves the DNA and homologous recombination with the homologous chromosome is used to repair the break. C) Cas9 cleaves the DNA to remove the complementary sequence. D) Cas9 cleaves the DNA and nonhomologous end-joining correctly repairs the break.

Biology & Microbiology

contains its own DNA and ribosomes

A. lysosome B. vacuole C. mitochondrion D. Golgi apparatus E. peroxisome

Biology & Microbiology

Laboratory fermentation tests often include a pH indicator because many bacteria produce (O2/bases/acids) as they ferment carbohydrates.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology