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The immune system is highly effective at preventing inappropriate activation. What safe guards are in place to prevent inappropriate activation of T cells? B cells? Thorough response only please.
Tomato plants usually have flowers in small groups and produce fruits that are round and smooth. Three mutations were found: peach (hairy fruits), oblate (flattened fruits), and clustered (with many flowers in a group).
DNA sequences differ between species due to substitution events, i.e. when new mutations arise and become fixed by drift or selection in one of the species.
Why are modern rates of invasion so much higher than pre-historic rates.
What group of organisms would make up the largest level of a biomass pyramid for a grassland ecosystem? What kind of organisms might make up the next level?
Small molecules move through membranes in different ways -- different for different molecules or compounds, that is.
Design an experiment to determine the optimal temperature for enzyme function, complete with controls. Where would you find the enzymes for this experiment? What substrate would you use?
An arginine residue (Arg 210) in the matrix-side proton channel of the a subunit of ATP synthase is near the aspartate residue (Asp 61) in the c ring subunit. How might Arg 210 assist proton flow?
Discuss and explain how ideas about stress immunization evolved into realization that maternal behavior actually plays an important role in mediating the effect of early stress, citing both animal and human research.
what hormones are produced by the theca and granulosa cells of a maturing or pre-ovulatory follicle?
What is contributing to decreased alveolar ventilation. Describe the reflexes involving causing the tachypnea in this individual.
Albinism is an autosomal recessive trait in the clouded salamander (Aneides ferreus). In the main cave population at Oregon Caves National Monument, 100 salamanders are albino while 900 individuals are not (891 AA and 9 Aa). Assume that this popul..
Which of the following is the best experimental protocol by which to test the preference of an herbivore for one of two plants.
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