Biology, 26.07.2019 19:00 mawawakaiii
Darwin hypothesized that there are definite steps to natural selection. consider the model here. use the roman numerals (i - iii) to guide you through the steps. which is an accurate description of darwin's hypothesized theory of natural selection? a) sexual reproduction of bacteria cause variation. some bacteria survive and some do not. over time all of the bacteria should become extinct. b) in any population, variation exists. some bacteria are resistant to antibiotics. most bacteria die, but the bacteria that are resistant survive and reproduce. c) in a population of bacteria that are exposed to antibiotics, some bacteria change their genetic make-up and survive. the new genetic make-up is passed on to offspring. d) there is a change in the environment: an antibiotic is added. some of the bacteria are capable of changing to the new environment. they survive and reproduce, passing along their favorable traits.
Answers: 2
Biology, 22.06.2019 04:30
African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.
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Biology, 22.06.2019 12:30
What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome
Answers: 2
Biology, 22.06.2019 14:00
Compare the shapes of the bones of the human skull with the shapes of the bones of the human leg. how do the shapes differ? why are the shapes important?
Answers: 1
Darwin hypothesized that there are definite steps to natural selection. consider the model here. use...
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