Abiologist studied a population of squirrels for 15 years. during that time, the population was never fewer than 30 squirrels and never more than 45. her data showed that over half of the squirrels born did not survive to reproduce, because of both competition for food and predation. in a single generation, 90% of the squirrels that were born lived to reproduce, and the population increased to 80. which inference(s) about this population might be true? the amount of available food may have increased. the parental generation of squirrels made a peace treaty with it's predators. the number of predators that prey upon squirrels may have decreased. a and c could be true. a, b, and c could be true.

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?