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1. What new, important trait do all gymnosperms and angiosperms share, that is lacking in ferns and horsetails?2. Which group evolved first, Gymnosperms or Angiosperms? Which is most numerous (rich in species) now? 3. Which group (Gymno or Angio) was dominant in the Cenozoic era? The Mesozoic era? The Paleozoic era? (fig 29.1)4a. Which gymnosperm group is represented by the most living species? 4b. Which by only one?4c. Which is mainly tropical?4d. Which two groups develop their seeds in cones, which are often large?5. Are flowers associated with "naked seeds" or "enclosed seeds"?6. Gymnosperms lack flowers; then how do they get fertilized to make seeds?7. What is the micropyle?8. Which of the following plant clades makes the most use of animal (especially insect) pollinators for fertilization? How do the other clades accomplish fertilization?Gymnosperms, Mosses, Ferns, Angiosperms9. What happens during "double fertilization"? Which plant groups do it?10. How is triploid endosperm formed, and what is its function?11. What are the three stages of activity in the life of an angiosperm pollen grain which succeeds in fertilizing an ovule with its sperm? 12. What happens in the grain stage, the tube stage, and the sperm stage?
Create a detailed diagram of DNA synthesis. With your diagram list the enzymes involved in the process and their respective functions.
Richard does not know it, but he has an aneurysm at the base of his left middle cerebral artery. One of Richard favorite activities is to take a hot sauna bath and then jump into cold water.
Suppose that the genes required for Isoleucine biosynthesis are contained within an operon. If the cell is grown in the presence of high values of isoleucine you would expect to find,
Mrs. Smith and Mrs. Jones had baby girls same day in same hospital. Mrs. Smith named her baby Shirley and Mrs. Jones named her baby Jane.
The complete oxidation of one glucose molecule yields thirty or more ATP. Glucose catabolism includes glycolysis, pyruvate oxidation, and the citric acid cycle.
The ß-hemoglobin locus in humans is implicated in resistance to falciparum malaria. Estimates of fitness vary geographically, but assume that, in one particular area with endemic malaria,
Perform a search to find out amino acid sequences of the database similar to the query amino acid sequence supplied. explain a BLAST Search Query Amino Acid Sequence.
Yet jam can be left unrefrigerated for long periods without contamination by bacteria and mold. Which provides the best explanation for this phenomenon.
Interestingly after activation of the rtk by your antibody you notice that the downstream effects are different than the effects seen with the normal ligand for that receptor. Describe at least one way that this may be possible.
What is the genotypic and phenotypic ratio in the offspring produced by the cross AABb x Aabb if A is green colour, a - yellow; B- tall plants. b -short plant? Suppose complete dominance for the trait. Describe results of the cross using branching di..
Assume if the DNA in one of your skin cells were to change, which cells that are you would inherit that change?
theoretical genetic strains of a virus are used to simultaneously infect a culture of host bacteria. Of 10,000 plaques scored, the genotypes in the following table were observed.
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