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Q1. 1. Every time Spike went to a boxing match, he wanted to see a knockout. Finally his friend explained what happens when someone gets knocked out. What is the explanation? What may be the repercussions?
2. Explain how hypothalamus of the brain and the autonomic nervous system allow us to fight or flee in a stressful situation.
3. What are the differences between myelinated and unmyelinated axons? Which conducts axon potentials (nerve impulses) more rapidly? Why give reasons?
Q2. In the tide pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism may well potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which structures would allow for the most certain identification of the organism?
Humans are parts of food chains and food webs, too. Where on a food web would you typically find humans (near the bottom with the producers, at the top with carnivores, or somewhere in between)?
n beans yellow (Y) is dominant to green (y) and smooth (S) is dominant to wrinkled (s). What are the possible genotypes for the offspring of the following cross: YySS and YYSs.
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.
What is Red Queen evolution and how does it apply to the search images of predators and the camouflage patterns of prey? Discuss in the context of specific experimental studies.
In some species, males donate only sperm to the female (i.e., she does not receive a direct benefit). Give an example of this kind of mating system (you may use a particular species or a type of mating system) (1).
If the nucleotide sequence, ACTGAG, represents the sticky end of a DNA molecule, to what other nucleotide sequence would it "stick
Wild type e. coli can synthesize all 20 common amino acids, but some mutants, called amino acid auxotrophs, are unable to synthesize a specific amino acid and require its addition to the culture medium for optimal growth.
This is "new methylene blue" stained blood. What cell is stained? What are the "inclusion bodies" called in this case of thalassemia? Describe this slide (is it peripheral blood smear/bone marrow aspirate or biopsy, and is it normal/abnormal?).
For the 46 chromosome in human body, are they inside each cell ?
What is the significance of the chloroplasts structural feature that the thylakoid membrane is located between the stroma and the thyloakoid space.
Explain the significance of the F2 ratios Mendel obtained: why are all the ratios close to 3:1? Choose one of the traits he examined and show a Punnett square of the F2 generations to illustrate your answer.
How do we define ecological succession or identify examples of succession, How can you explain the relationship between population growth rate and carrying capacity in logistic growth
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