Which of the following groups of organisms are homeotherms?

What has been done to try to curtail whaling? Have efforts been successful?

A fungal cell that contains two genetically different nuclei would be classifi ed as a. monokaryotic. b. bikaryotic. c. homokaryotic. d. heterokaryotic.

The two groups of animals that are homeotherms are the ______.

Which of the following is a false statement concerning carboxylic acid (-COOH) groups?

A. None of these answers are correct
B. They are nonpolar
C. They are found in amino acids
D. They are basic functional groups

What adaptations do marine mammals have for diving?

If a pathogen contains an avr gene not recognized by a plant, the plant will most likely a. develop a disease. b. eliminate the pathogen because it is unrecognized. c. develop proteinase inhibitors. d. develop a different R gene.

You decide to plant a garden with a beautiful black walnut at one end and a majestic white oak at the other end. You are quite disappointed, however, when none of the seeds you plant around the walnut tree grow. What might explain this observation? a. The walnut tree fi lters out too much light, so the seeds fail to germinate. b. The roots of the walnut tree deplete all of the nutrients from the soil, so the new seedlings starve. c. The walnut tree produces chemical toxins that prevent seed germination.

Some plants are recognized by fungal pathogens on the basis of their stomatal pores. Which of the following would provide these plants immunity from fungal infection? a. Removing all of the stomata from the plant b. Changing the spacing of stomatal pores in these plants c. Reinforcing the cell wall in the guard cells of stomatal pores d. Increasing the number of trichomes on the surfaces

Your friend informs you that it is highly likely all of the plants in your yard are “infected” with some kind of fungi or bacteria. The plants look perfectly healthy to you at this time. The most prudent thing for you to do would be: a. Remove all your plants because they are likely to die. b. Spray your plants with chemicals to remove all bacteria and fungi. c. Remove all your plants and replace the soil. d. Do nothing because many of these bacteria and fungi may be beneficial.

If a plant has been attacked by a pathogen, then it is likely to be able to respond more quickly to a subsequent attack due to a mechanism called a. basal defense. b. induced hypersensitive response. c. antimicrobial pathogen resistance. d. systemic acquired resistance.

Some plants have developed a mutualistic relationship with parasitoid wasps. This mutualistic relationship would not occur if a. the plant quit producing nectar for the wasp. b. the wasp ceased to live on the plant. c. the plant quit producing volatile compounds that attract the wasp. d. the plant attracted too many caterpillars.

Explain how it is possible for a large force to produce only a small, or even zero, torque.

What is delayed implantation? What advantage does it give pinnipeds?