Chromosomes are
A. composed of DNA and lipid.
B. found only in the cytoplasm.
C. composed of DNA and carbohydrate.
D. composed of DNA and protein.
D. composed of DNA and protein.
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As climate changes because of global warming, plant species' ranges in the northern hemisphere may move northward. The trees that are most likely to avoid extinction in such an environment are those that _____
A) have seeds that are easily dispersed by wind or animals B) have thin seed coats C) produce well-provisioned seeds D) have seeds that become viable only after a forest fire E) disperse many seeds in close proximity to the parent tree
Describe the steps in the polymerase chain reaction (PCR)
What will be an ideal response?
The pages of your textbook consist mainly of material made by multicellular, photosynthetic
organisms that function as producers in ecosystems. These organisms belong to the kingdom ____.
a. Plantae b. Fungi c. Animalia d. “Protist” e. Bacteria
Assuming that that rate of carbon dioxide uptake is the rate-limiting step in photosynthetic growth, which algal species will grow faster if the concentration of carbon dioxide is: 5 mM? 100 mM? 2000 mM?
Two algal species utilize different transport proteins to take up carbon dioxide for use in photosynthesis. The kinetics of carbon dioxide uptake by the transport proteins in species A and B are different: Species A Species B Km 1000 mM 10 mM Vmax 1000 mmol/min 100 mmol/min