Ultimate Biology Study Guide - Questions & Answers

which of the following photosynthesis inputs is correclty paired with the tissue or structure responsible for bringing it into the plant?
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A study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that ________.a. we have already exceeded the planet's biocapacity per personb. we are far below the planet's biocapacity per personc. the human population will soon crashd. Earth can sustain a population about double the current population
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Match the type of receptor with the appropriate description.A. chemoreceptorsB. touch receptorsC. thermoreceptorsD. nociceptors
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Which of the following is a consequence of biological magnification?A. toxic chemicals in the environment pose greater risk to top-level predators than to primary consumersB. populations of top-level predators are generally smaller than population of primary consumersC. the biomass of producers in an ecosystem is generally higher than the biomass of primary consumersD. only a small portion of the energy captured by producers is transferred to consumersE. the amount of biomass in the producer level of an ecosystem decreases if the producer turnover time increases
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The mixing of atmospheric air within the dead space of the conducting zone of the lung upon inspiration results in a partial pressure of:a. water vapor in the alveoli that is lower than atmospheric.b. nitrogen in the alveoli that is higher than atmospheric.c. oxygen in the alveoli that is lower than atmospheric.d. carbon dioxide in the alveoli that is lower than atmospheric.
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Mike and Sylvia are enjoying their newfound freedom as retirees and are usually content to go with the flow. They are best described as:A) continuers.B) adventurers.C) searchers.D) easy gliders.
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f a cell has completed meiosis i and is just beginning meiosis ii, which of the following is an appropriate description of its contents? it has half the chromosomes but twice the dna of the originating cell. it has the same number of chromosomes, but each of them has different alleles than another cell from the same meiosis. it has one-fourth the dna and one-half the chromosomes as the originating cell. it is identical in content to another cell formed from the same meiosis i event. it has half the amount of dna as the cell that began meiosis.
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ou inoculate a plate of general-purpose medium with clostridium sporogenes, and you incubate it for 48 hours at its optimum temperature. when you remove the plate from the incubator, you notice that there is no growth on the plate. besides errors made in inoculation, what else could explain this lack of growth? multiple choice this organism is a facultative anaerobe and requires the absence of oxygen for growth. this organism is an obligate aerobe and requires the presence of oxygen for growth.
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homo heidelbergesis . group of answer choices invented the bow and arrow all of these statements are correct made cave paintings controlled fire
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a binding constraint is one for which the cell value is greater than the right-hand side of the value of the constraint.
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some fish have a density slightly less than that of water and must exert a force, by swimming, to stay barely submerged.
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if you understand gastrulation in a frog embryo, you should be able to describe how the ectoderm comes to completely cover the embryo
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Which of the following describes thecoastal photic zones?A. permanent darkness below 1000 meters withbioluminescent bacteria, bottom feeders, and angler fishB. up to 200 meter depth and includes photosyntheticplants, sea anemones, sponges, crabs, and clamsC. the "twilight zone" between 200-1000 meters deepand includes whales and octopi and little life
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Which of the following is a characteristic of mitochondria that suggests that they might have evolved from free living bacteria? A. The plasma membrane of a mitochondrion, forming the surface of this organelle, is the site of many important steps of cellular respiration. B. Mitochondria have cell walls. C. Mitochondria have their own DNA. D. Mitochondria rely upon proteins as their source of energy.
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During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action potential. This is due to the fact that ________.A) the voltage gated potassium ion channels remain open long enough to hyperpolarize the axon membraneB) the membrane is now impermeable to all ionsC) the sodium potassium pump will stop working during relative refractoryD) the inactivation gates on voltage gated sodium ion channels are closed
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Review Email i and then write an email to Tess identifying the first messenger that starts the signal transduction in the smooth muscle cell, the likely second messenger, and finally the cellular response caused by the cell signaling cascade. Explain why the arrows go from small to bigger. Also identify whether the receptor that starts the cell signaling pathway is in the plasma membrane or intracellular. Review Email 2 and then answer the following questions: 1. Melody said that ginseng enhances erection. What effect would you expect ginseng to have on nitric oxide? Why? 2. Knowing that Melody said Viagra also enhances erection, what effect would you expect it to have on PDE5? Why? 3. If neither chemical works what protein(s) would you suspect is "broken"?
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Suppose you view a slide under the low-power lens of a microscope. You are able to focus the object, and increase the lens magnification. However, you have trouble focusing the image in the high-power lens. What action is most likely to resolve the issue? O Return to the low-power magnification, refocus on the object, then return to the high-power lens. O Take the slide off the stage and clean the lenses with lens paper. O Use the coarse adjustment knob to try to focus on the object. O Try a different slideOnly the coarse adjustment knob should be used when viewing an image with the high-power lens. O True O FalseIf a specimen is in liquid, how should you mount it onto a slide? O Remove the sample from the liquid and place it on a dry slide. O Put a drop of water on the slide, remove the sample from its liquid and place it in the water on the slide O Place a drop of the sample in its liquid on the slide O Put as much of the sample in its liquid on the slide as you can
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As compared to agricultural variety, monoculture farminga. is better able to provide a range of nutrients, phytochemicals, and types of dietary fiber.b. requires a lighter application of pesticides.c. requires a heavier application of fertilizers.d. decreases a region's vulnerability to food shortages during heat waves, droughts, and floods.
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which of the following best explains the connection between energuy, growth, and the maintenance of an ordered system in teh experiment
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Oxidative phosphorylation requires ADP, Pi, O2, and an oxidizable metabolite, NADH or FADH2. Experimentally, respiratory control is demonstrated by following oxygen utilization in isolated mitochondria. Which of the following statements is true?(A) If 2 equivalents of ADP are added, the uptake of oxygen is tripled.(B) If an oxidizable substrate is added in the absence of ADP, the uptake of oxygen increases(C) If ADP is added in the presence of an oxidizable substrate, the uptake of oxygen increases(D) If an excess amount of ADP is added, the uptake of oxygen continues to increase even if the oxidizable substrate is used up.
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Which of the below statement correctly describes cancer cell behaviour?grows without regard of cell cycle checkpointsinvades the epithelium of a different tissue typedoes not rely of growth factors to stimulate cell divisiongenetically instableare less likely to activate apoptosisall of the above
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When looking at the carbon isotopes present in the atmosphere, scientists determined that 13C and 14C levels have decreased over time. What did researchers conclude from these observations?A. volcanic activity is responsible for increased atmospheric CO2B. the burning of forests is responsible for increased atmospheric CO2C. the use of fossil fuels is responsible for increased atmospheric CO2D. increased plant/animal respiration is responsible for increased atmospheric CO2
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interferon priming is essential for human cd34 cell-derived plasmacytoid dendritic cell maturation and function. t/f
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What does muscle physiology have to do with stress management?Many muscles in the body remain in a chronically contracted state because they are continuously receiving the message from the nervous system that they should be contracting in preparation for the fight or flight response. They do not receive the signal from the nervous system that the threat has passed and it is safe to relax.
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