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Q1. Healthy individuals of Paramecium bursaria contain photosynthetic algal endosymbionts of the genus Chlorella. What time within their hosts, the algae are referred to as zoochlorellae. In aquaria with light coming from only one side, P. bursaria gathers at the well-lit side, whereas other species of Paramecium gather at the opposite side. The zoochlorellae provide their hosts with glucose and oxygen, and P. bursaria provides its zoochlorellae with protection and motility. P. bursaria can lose its zoochlorellae: (1) if kept in darkness, the algae die, and (2) if prey items (mostly bacteria) are absent from its habitat, P. bursaria will digest its zoochlorellae.
Which term precisely describes the behavior of Paramecium species that lack zoochlorellae in an aquarium with light coming from one side only?
a. negative chemotaxisb. positive chemotaxisc.negative phototaxisd.positive phototaxis
Q2. Assume that, during biological research, it became possible to incorporate fully functional chloroplasts into the basal layer of our epidermal skin cells. Knowing the structure and function of chloroplasts, how will this influence our body?
Which of the follow statements regarding cancer risk factors is false. Mutagens are generally not carcinogens.
Why or why not explain with reason? Work the genetics problem predicting the frequencies of the versions of this trait among their prospective children.
Black coat of animal is dominant; white is the alternative recessive. While true-breeding black is crossed to true-breeding white, what is the possibility that a black F2 is heterozygous.
What are some potential research questions that would be interesting to ask of the species prepare a hypothesis and an experiment to test your hypothesis.
Which pair will have been likely to agree that strata such as those depicted here were deposited gradually over long periods of time by subtle mechanisms that are still at work?
The pH of the inner thylakoid space had been measured, as have the pH of the stroma and the cytosol of a particular plant cell. Why will this cause the pH in the thylakoids to be lesser than the pH in the stroma.
A friend has just returned from a trans-Atlantic jet aircraft flight and reported that the plane dropped about1000 m when it entered an "air pocket." Explain to a friend what apparently happened to cause this drop.
Protein classification schemes
Which of the subsequent statements is true about phylogeny. The ancestral group frequently has all the synapomorphies of the descendant species.
The bases in this "glyceronucleic acid" are symbolized as B, D, H, and U. The monomers are linked during phospodiester bonds and the bases form hydrogen bonds between the strands according to the following rules; for every B, there are twice as many ..
Explain three things that a paleontologist must do to plan a fossil hunting expedition so that he is likely to find evidence to reply a specific scientific question.
A scientist has discovered a new cell. illustrate, in detail, ALL the ways the scientist could decide if the cell comes from a plant or an animal. How several of these result in the release of oxygen into the atmosphere?
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