Recall that sedimentary rocks, living organisms, oceans, and soil are all carbon reservoirs. If the carbon in each of these reservoirs was instantly transformed into atmospheric CO2, which reservoir would contribute the most CO2 to the atmosphere?
A. sedimentary rocks
B. living organisms
C. oceans
D. soil
A
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You are asked to determine if a tissue sample taken from a plant stem comes from a monocot or eudicot. How will you accomplish this?
A. Look at the ground tissue to see if it is arranged in concentric rings or in parallel bundles. B. Examine the vascular cambium and determine if it is divided into segments or is continuous throughout the stem. C. Determine if the xylem and phloem are located in separate vascular bundles or are bundled together. D. Examine the epidermis and determine the depth of the cuticle layer. E. Locate the vascular bundles and analyze their pattern.
In placental mammals, such as humans, the dosage compensation mechanism to equalize expression of sex-linked
genes in males and females involves ____.
a. doubling the gene expression for most genes on the X chromosome in males b. doubling the number of X chromosomes in males during embryonic development c. having all major genes on the X chromosome also present on the Y chromosome d. halving the gene expression for most genes on each X chromosome in females e. inactivating one of the two X chromosomes in most female somatic cells
Which of the following examples would be undergoing secondary succession? Check all that apply.
_____ an abandoned potato farm _____ a coastal grassland damaged by a hurricane _____ an abandoned landfill _____ rocks in a national park covered by mosses and lichens _____ a garden bed that has been weeded Clarify question: What is the key concept addressed by the question? What type of thinking is required? Gather Content: What do you already know about secondary succession? What other information is related to the question? Choose Answer: Given what you now know, what information is most likely to produce the correct answer? Reflection on Process: Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Vitamin C deficiency may lead to scurvy, a disease characterized by skin lesions and blood vessel hemorrhages due to weakened connective tissue. Vitamin C deficiency has this effect because the vitamin is
a. a critical structural component of collagen. b. required for the enzymatic activity of prolyl hydroxylase. c. required for the enzymatic activity of cellulose synthase. d. required for the enzymatic activity of hydroxyprolyl hydroxylase.