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Aphids can reproduce sexually and asexually. Females reproduce by themselves and give birth to live females in summer. They also reproduce sexually and lay eggs that survive in summer and eggs that survive in the winter and hatch in the spring. Often found on ornamental plants, aphids are among the most common pest groups for plants. They are also a popular food for many predators including lady bugs, parasitic wasps, and fly larvae.
Explain how the reproductive variability of aphids might be an adaptation that allows them to survive very aggressive predation.
For the fish model organism Medaka, genes at 2 loci B, b and R, r determine color of the fish. Estimate the expected phenotypic ratio of offpsring of cross betweena homozygous brown and homozygous white Medaka fish?
Cellulose can provide a widely available and cheap form of glucose, but humans cannot digest it.
find out the major pathway of glycine degradation. you find that the amino acid serine contains the most radioactivity, and that both the Calpha and Cbeta carbons of the serine residue are labeled with 13C. Explain these observations.
The breakdown of complex glycogen molecules into simple glucose molecules is most accurately described as a anabolic reaction.
Gases move from areas of high (total) gas pressure to areas of low (total) gas pressure. Also, the pressure of a "canned" gas changes if the container volume changes.
A parallel plate flow chamber is used to measure the viscosity of an unknown fluid. With a channel height of 0.1 cm and width of 1 cm, the wall shear stress can reach 3 Pa with flow rate of 8 cm3/s.
Cut wings is an X chromosome recessive mutant of D melanogaster. Antennaless is an autosomal recessive mutant. A cut, antennaless female is mated to a wild-type male.
When mendel crossed yellow-seeded and green-seeded pea plants, all of offspring were yellow seeded. As he took these yellow-seeded plants and crossed then with green- seeded plants what genotypic ratio is expected.
Two linked genes, S and T, are separated by 8 cM. Peter, who has the genotype ST/st, marries Oliviam who is st/st. peter's father was ST/ST. what is the probability that peter and olivia's first child will be St/st? What is the possibility that their..
Suppose that the Temperature is 37C and the Membrane Potential is -60mV, with the interior negative with respect to the exterior of the cell.
Both endocrine and nervous system are major regulating system of the body; but nervous system has been compared to an airmail delivery system and the endocrine to pony express. Briefly explain the comparison.
Eye color is expressed thrugh two genes A and B. Dark brown eye color, A, is dominant over lighter brown a. Eye pigment, B, is dominant over lack of eye pigment, b.
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