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Yakvenalex [24]
3 years ago
8

HELPP ASAP PLEASE I NEED ANSWERS GIVE A LOT OF POINTS (answer all plzzzz) 11-15

Biology
1 answer:
mars1129 [50]3 years ago
7 0

Answer:

11.) red aka b

12.)orange aka a

13.)yellow aka c

14.) orange aka b

15.) last one aka c

Explanation:

11.) F=ma---> 75=0.445(a)--->a=168.5m/s^2

12.)F=ma---> 5,100=m(3)---->m=1,700kg

13.)F=ma---> 3.63=18.15(a)--->a=0.2m/s^2

14.)F=ma---->F=(2,030,000)(15)----->F=30,450,000n

15.) Doubling the mass doubles the acceleration

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An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which include
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An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which included a few sagebrush plants and numerous small, annual wildflowers. She found the same five wildflower species in roughly equal numbers on both plots. She then enclosed one of the plots with a fence to keep out kangaroo rats, the most common grain-eaters of the area. After two years, to her surprise, four of the wildflower species were no longer present in the fenced plot, but one species had increased dramatically. The control plot had not changed. Using the principles of ecology, propose a hypothesis to explain her results.

Explanation:

  • This example highlights the impact of plant predation on species selection. In the fenced off plot animal predation is not a factor on plant selection.
  • In this case plants will compete for resources only with each other and in this case one plant had a selective advantage over the other 3 species of plants. In the plot exposed to animal predation the ratio of the four species is equal.
  • This is likely do to an increased preference of animals for the plant species that dominates in the fenced off plot and/or anti-animal predation tactics by the other three species.

a.Hypothesis: kangaroo rats are keystone species

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b.Hypothesis: kangaroo rats exert top-down control on community

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  • When a sing copy of a gene is mutated in a person then this disorder is not appeared and the person is called a carrier.
  •  So when a child is born by two carrier parents then there is a chance that a child will be affected if both the parents donate mutated genes.
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