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Pyrethrum is an African plant that develops daisy-like flowers with white petals and yellow centers. The chemical pyrethrin is produced in large amounts in the flower buds. Pyrethrin is a very strong poison that shuts down the nervous system of insects. This chemical is used as spray to kill insects by contact. It is also widely used in collars and shampoos to control bugs on animals such as pet dogs and cats as well as cattle, sheep, swine, and horses.
Which one of the following would NOT be found in both the insect cells and in pyrethrum plant cells?
A. ATP moleculesB. MitochondriaC. Golgi apparatusD. NucleusE. None of the above (Meaning that all of these things would be found in both types of cells)
Two (2) liters of a hypotonic 0.5% NaCl solution is infused into the extracellular fluid compartment of a 40 Kg dog with initial plasma osmolarity = 300 milliosmoles/liter.
Discuss why is even weak selection still stronger than drift in very large populations at non-neutral loci?
Suppose as you are working in the lab, you obtain a major career-defining result. You have discovered a new TLR, which recognizes either a bacterial or viral antigen.
Do you really think the age of the man is main in determining the chance of chromosomal abnormalities? Why or why not with appropriate reasons. Describe a single meiosis event.
Though plants, fungi, and prokaryotes all have cell walls, we classify them under different taxonomic units. Which of the observations below comes closest to explaining the basis for placing these organisms in different taxa.
A species has a diploid number of 2n. Meiosis I fails during spermatogenesis, cytoplasm does not divide and only one daughter cell is manufactured. The resulting sperm fertilizes a normal ovum.
As we know that mean arterial blood pressure = CO cardiac output x total peripheral resistance (TPR), what might be a normal mechanism to compensate for elevated blood pressure?
Hand draw the backbone conformation of Alanine Dipeptide.
Discuss the advantages and disadvantages of using non-manipulative as opposed to manipulative methods of data collection within a given habitat.
Which of these is not a characteristic of soil?
Both endocrine and nervous systems are major regulating system of the body; though, nervous system has been compared to an airmail delivery system and the endocrine system to the pony express. In brief explain this comparison.
Assume you have found a new Xenopus gene that codes for a RNA binding protein. You are not sure what its function is but you are interested in finding out as much as you can.
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