- Study guides, Class notes & Summaries

humans have how many chromosomes? correct answer: 23 pairs Diploid Cell correct answer: 2n (2 of every chromosome) Haploid correct answer: N (1 copy of every chromosome) Are sex cells diploid or haploid? correct answer: haploid Cell cycle consists of what stages correct answer: G1, S, G2, and M phases Interphase correct answer: the chromatin is unraveled, or dispersed throughout the nucleus and is essentially invisible as individual structures During interphase correct an...

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18 pages

Written in 2022/2023

Grade A+

Classroom

If there is a fire drill, what is the first course of action? correct answer: Turn off the gas. Listen to instructions. Glasses or contact lenses in the lab? Why? correct answer: Glasses. Can't wear contact lenses because if a chemical gets in your eye, the contacts can absorb it. During the experiment you have accidently got some liquid into your eye. What are you going to do? correct answer: Rinse eye out in the sink that is meant for rinsing eye out. If there is broken glassware,...

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21 pages

Written in 2022/2023

Grade A+

Classroom

Species evenness is an important measure of diversity in an ecosystem. T/F correct answer: true When a tapeworm steals nutrients from the gut of a mammalian host, that symbiosis is called: intraspecific competition. parasitism. commensalism. mutualism. predation. correct answer: parasitism Based upon the age structure diagram, you expect the American population to: grow because all of the age classes have roughly equal proportions of people. grow then shrink because many of th...

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42 pages

Written in 2022/2023

Grade A+

Classroom

The prefix milli means correct answer: 0.001 The prefix micro means correct answer: 0. The metric baseline unit for distance is the correct answer: Meter The metric baseline unit for mass is the correct answer: Gram How many mm are in one meter? correct answer: 1000 6.5g is equivalent to 0.0065 correct answer: Kilograms Expand 7.2 x 10*-6 correct answer: 0. Expand 5.4 x 10*3 correct answer: 5400 On the____ temperature scale, water freezes at 0' correct answer: C...

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8 pages

Written in 2022/2023

Grade A+

Classroom

Whether in a gas, a liquid, or a semisolid, diffusion always occurs. correct answer: from high to low solute concentration Which dye would you predict to move the fastest (and thus go furthest in a given time period) through agar? correct answer: Potassium permanganate (mw= 158) The spreading out of molecular from a center of higher concentration is the result of correct answer: The random movements of molecules What determines the direction of diffusion? correct answer: concentrati...

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13 pages

Written in 2022/2023

Grade A+

Classroom

Which of the following statements correctly summarizes cell theory? correct answer: All organisms are made of cells, and all cells come from preexisting cells. Natural Selection correct answer: Natural selection occurs when heritable variation in certain traits leads to improved success in reproduction. Natural selection acts on individuals. Which statement best explains the physical basis for why oil (molecules containing only carbon and hydrogen) and water do not mix? correct answer: ...

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13 pages

Written in 2022/2023

Grade A+

Classroom

A pair of shared valence electrons is referred to as a(n): a. covalent bond b. hydrophobic effect c. van der Waals interaction d. ionic bond correct answer: a. covalent bond For an atom that is NOT an ion, which of the following must be TRUE? a. the number of electrons equals the number of protons b. the number of protons equals the number of neutrons c. the number of electrons equals the number of neutrons correct answer: a. the number of electrons equals the number of protons As...

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61 pages

Written in 2022/2023

Grade A+

Classroom

DNA is used as a template for making correct answer: proteins and RNA. A student was testing whether PTC tasting ability correlated with amount of coffee consumed. She tested determined the lowest concentration of PTC that an individual could taste and rated it on a scale from 1-14. Then, she surveyed each individual about the number of cups of coffee that they consume a week. Her data can be seen below. correct answer: here does not appear to be a relationship between PTC tasting and coffe...

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8 pages

Written in 2022/2023

Grade A+

Classroom

Proteins that act as catalysts; or a protein that functions as a catalyst for a chemical reaction. correct answer: Enzymes Substances that regulate the rate of chemical reactions but do not unite permanently with reactants correct answer: Catalysis Heat, acids, and bases break the weak hydrogen bonds holding the protein together. This ruins the unique shape of the protein in a process called....? correct answer: Denaturation The region of the enzyme where contact is made between the ...

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7 pages

Written in 2022/2023

Grade A+

Classroom

When teaching a patient about wound healing, which of the following should the nurse tell the patient? a) fat tissue heals more readily because there is less vascularization b) chronic wounds heal more efficiently in a dry, open environment, so leave them open to air when possible c) long-term steroid therapy diminishes the inflammatory response and speeds wound healing d) inadequate nutrition delays wound healing and increases risk for infection. correct answer: d) a package of gauze ...

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15 pages

Written in 2022/2023

Grade A+

Classroom

Why did the catalase function level off when different hydrogen peroxide concentrations were tested? correct answer: At some point, all the catalase in solution was catalyzing reactions, so even if the hydrogen peroxide concentration was increased, the rate of the reaction could not increase any more. How much slower would hydrogen peroxide likely be decomposed if catalase was not available in cells? correct answer: 1,000,000 times At which temperatures did catalase function somewhat, bu...

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11 pages

Written in 2022/2023

Grade A+

Classroom

COARSE ADJUSTMENT KNOB correct answer: used with the low power objective CONDENSER correct answer: controls the amount of light FINE ADJUSTMENT KNOB correct answer: used with the high power objective OCULAR LENS correct answer: eyepiece TUBE correct answer: holds the nosepiece mass correct answer: amount of matter in an object volume correct answer: amount of space an object takes up water displacement correct answer: used to measure the volume of an irregular object...

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20 pages

Written in 2022/2023

Grade A+

Classroom

BIO Lab Exam Questions & Answers

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9 pages

Written in 2022/2023

Grade A+

Bensuda