No till farming is advantageous because it

A) reduces soil erosion.
B) increases yield.
C) decreases need for pesticide use.
D) decreases plant cover.


A

Biology & Microbiology

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Bread mold can grow in a minimal medium without supplements (wild type) while certain mutated strains (mutants) can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:

minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine. Which of the following would be TRUE of a strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone? A. The strain would have a mutation in the gene that encodes enzyme 1. B. The strain would have a mutation in the gene that encodes enzyme 2. C. The strain would have a mutation in the gene that encodes enzyme 3. D. The strain would have a mutation in the gene that encodes for enzymes 1, 2, and 3. E. The strain would be the wild type with no genetic mutations.

Biology & Microbiology

Today, evolutionary biologists view speciation as an event

a. True b. False

Biology & Microbiology

The outcome of an infection is called a(n) ________

Fill in the blank(s) with correct word

Biology & Microbiology

Which of these vascular tissue cells is alive but lacks a nucleus?

A. vessel element B. tracheid C. companion cell D. sieve-tube members

Biology & Microbiology