What is one of the benefits of genetic engineering of plants?
A.) reduced diversity among crop plants
B.) increased allergies to plants and pollen
C.) elimination of natural crop pollinators
D.) enhanced disease resistance in crops
Answer: D.) enhanced disease resistance in crops
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T4 and other bacteriophages commonly use a method of DNA replication and packaging called "headful packaging."
Explain how viral genomes are replicated and packaged in this process and hypothesize how headful packaging might affect evolution of BOTH the bacteriophages and their prokaryotic hosts. What will be an ideal response?
Whether an organism is classified as a photoheterotroph or a photoautotroph depends on its
A) energy source. B) carbon source. C) oxygen requirements. D) carbon and energy sources.
Some members of the species D. bifasciata produce mostly female offspring if reared at or below 21°C. The causative agent of this condition (called sex ratio) is a protozoan infection that is lethal to most male larvae
How can you demonstrate that it is both inherited and extrachromosomal? A) Inject ooplasm of affected females into normal females and then mate these with normal males. B) Inject cytoplasm from somatic cells of an affected female into normal females and then mate them with normal males. C) Mate affected females with normal males and assess daughter somatic cells for presence of the protozoan. D) Perform reciprocal crosses of affected and normal individuals and examine the offspring for infection. E) Perform reciprocal crosses of affected and normal individuals and look for affected male offspring.
The water strider is an insect that skates across the water without sinking. The tips of its feet must be coated with molecules that are
What will be an ideal response?