Species of fish environment.
Species of fish environment. 
A good description of an allele.
A good description of an allele. Which of the following is a good description of an allele? A. It is a version of a gene produced by natural selection. B. It is a more modern and improved version of a particular gene. C. One of only two versions of a gene that we see within populations. D. It is one version of a particular gene. E. It is a dysfunctional version of a particular gene.
Genetic information about offspring.
Genetic information about offspring. Which of the following could Darwin and others living at that time have learned from breeding plants or pigeons? A. That genetic information was the only thing that fathers passed to their offspring. B. That it was not possible to predict anything about an offspring if you controlled the mating of its parents. C. That there was a clear relationship between genotype and phenotype. D. That there was a resemblance between parents and offspring at each generation. E. All of the choices would have been easy to learn from breeding.
Density control on a butterfly population.
Density control on a butterfly population. Which of the following describes a density-independent control on a butterfly population? (select all that apply) -A heat wave causes 80% of the butterflies to die while they are still eggs -A contagious disease sweeps through the population, killing 80% of the butterflies -A severe rainstorm drowns 80% of the butterflies -The females lay many eggs on each plant, such that the caterpillars eat nearly all the leaves and 80% of the caterpillars starve before becoming adults -A late spring cold snap reduces temperatures to outside the butterflies’ tolerance and 80% of them die in their cocoons
Bison’s future population size.
Bison’s future population size. You are trying to predict the future population size five years from now of a population of 500 bison that has an intrinsic growth rate of 0.10 per year, but you are not certain of the carrying capacity of the ecosystem. What is the difference in your predictions if the carrying capacity of the ecosystem is 1,500 bison compared to if the carrying capacity is 750 bison? A. One prediction is ~200 bison higher than the other prediction B. One prediction is ~50 bison higher than the other prediction C. One prediction is ~300 bison higher than the other prediction D. You predict a similar future population size with either carrying capacity E. One prediction is ~100 bison higher than the other prediction
An alien species
An alien species appears on Earth and biologists studying them collect the following life history data. The aliens are very large – nearly 200 tons in weight and over 30 meters in height. Their life span is about 800 years and they take nearly 100 years to reach sexual maturity. After mating, each female carries a single offspring and continually provides food and protection for it for the rest of her life. Consequently, juvenile mortality is extremely low and most individuals survive to adulthood. How would you describe this species’ traits, in terms of r- and K-strategists? A. These traits are all in between r- and K-strategists (in the middle of the continuum, not at either extreme) B. These traits are all typical of r-strategists C. This species has an even mix of r-strategist traits and K-strategist traits D. These traits are all typical of K-strategists
Population size Case study.
Population size Case study. You perform a mark-recapture study to understand the population
size of slender salamanders (Batrachoseps attenuates) in Arcata, California. You initially catch and mark 15 individuals. In your second sample, you catch 20 individuals, and zero of them are marked. You estimate the total population size as A. 20 individuals B. 50 individuals C. 125 individuals D. 0 individuals E. You cannot be certain without more study or a larger sample
Drugs and racially discriminatory prison.
Drugs and racially discriminatory prison. In this case study, we will be talking about drugs and racially discriminatory prison sentencing. This strongly and deeply relates to the chemistry we are learning right now, and I feel it is not only appropriate but the responsibility of an educator to apply what we’re learning to our world, especially as many of you are heading into medical professions. It may be uncomfortable or maybe even challenge some of your views. Several questions in this case study ask about your opinion, and I genuinely want to know what you think. It will not affect your grade at all if we have differing views, and I hope I have created an environment where you feel that you can express yourself freely. I recognize I also have much to learn, and I hope to continue learning from you.
When they arrived, the students of Professor Martinez’s class, though it would be yet another painfully dull and dauntingly difficult day in chemistry. The usual.
Professor Martinez began, “Today we will continue our discussion of acids and bases.” The class sighed.
Denise raised her hand, “Professor, I’ve heard that turning cocaine into the crack is an acid-base reaction. Is that true?”
Rather than scolding Denise for her outburst, Professor Martinez smiled. “Thank you, Denise. This is an excellent example. Class, as Denise said, the reaction of cocaine to form crack cocaine is indeed an acid-base reaction. In fact, another term for crack cocaine is ‘freebase.'”
“Can we make it as a lab?” Karl interjected, much to the delight of the class.
strand of Deoxyribonucleic acid .
strand of Deoxyribonucleic acid . What would be the corresponding (or complimentary) base pairs for the following strand of DNA (assuming no mutations) C A C G T G G A C T G A G G A C T C
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