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The green algal ancestors of plants lived in an aquatic environment, contained chlorophyll a and b, and had cell wall composed mainly of cellulose. Land plants also have chlorophyll a and b and have cellulose cell walls.
a. What traits in the plants are primitive?
b. What traits represent divergent evolution from the ancestral type?
A man with type A blood marries a woman with type B blood. Their child has type 0 blood. What are the genotypes of these individuals? What other genotypes, and in what frequencies, would you expect in offspringfrom this marriage?
Describe the process of viral replication; discuss both normal and retroviruses, and comment on the implications of this process for genetic engineering.
A 20-year old man presents with pain and swelling about the left knee for the past month. He thought that this condition resulted from an old football injury and that it would resolve without incedent. The pain however has persisted and is severe ..
Widespread resistance of malarial parasite to drugs like chloroquine has prompted attempts to develop a malarial vaccine to combat malaria. Explain why is it difficult to develop an effective malaria vaccine?
Determine which of the following statements is true regarding the flow of energy from the sun to stored chemical energy?
give the main functions of microfilaments in the cell.
Specifically, what is meant by the steady-state assumption in the derivation of the Michaelis-Menton equation?
Rotonone inhibits Complex I Cyanide inhibits Complex IV Oligomycin inhibits ATP synthase You incubate isolated intact mitochondria in a buffered solution containing NADH, ADP plus Pi.
What are the ecological effects of herbivores on plants? Why is the world green? A complete answer to this question would include all of the processes that limit herbivore growth.
In humans, nearsightedness and phenylketonuria are both inherited as single-locus autosomal recessive traits that assort independently. Assume that a family has been identified in which both parents were phenotypically normal, but their first chil..
Within a population of plants there are two alleles that code for flower color, red and white. Red is the dominant allele. If there are 300 red flowers and forty-five white flowers,
Suppose a cross has been made with maize between a plant with colored, nonshrunken kernals (C/C Sh/Sh) and a plant with colorless, shrunken kernels (c/c sh/sh).
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