Pond 1 contains 100 fish, 50 of which are tagged. pond 2 contains 1000 fish, 500 of which are tagged. you catch 10 fish from each pond. which statement is true?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Which statements about a food chain are true? choose all answers that are correct. a. plants are the first living organisms in food chains on land. b. the plants in a food chain are called herbivores. c. all food chains on land begin with energy from the sun. d. carnivores in a food chain eat only plants.

Which describes a major benefit that bioengineered technology has provided has provided to society? a. it’s application include the development of a new plastics for airplanes b. it’s application include the development of pacemakers and artificial limbs. c. it’s application include larger capacity for handheld music devices. d. it’s application include more energy-efficient fossil fuels.