It has been observed that certain species of insects which had not previously caused significant harm have become serious pests. the best explanation for this phenomenon is that the pesticide killed off predators which had previously held this species in check. a mutation occurred in the species. the pesticide increased the vigor of the species. ddt was able to be used by the pest as an additional food source. ddt is also a reproductive stimulator for some insect species.
Answers: 1
Biology, 21.06.2019 20:00
Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte
Answers: 1
Biology, 22.06.2019 00:00
What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !
Answers: 1
Biology, 22.06.2019 00:50
Akrabby blind whale has married pearl who has normal vision. oneof their two sons is also colorblind. what arr the genotypes of the parents?
Answers: 3
Biology, 22.06.2019 02:30
In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring
Answers: 1
It has been observed that certain species of insects which had not previously caused significant har...
English, 09.12.2020 16:40
Health, 09.12.2020 16:40
Mathematics, 09.12.2020 16:40
Mathematics, 09.12.2020 16:40
Health, 09.12.2020 16:40
Mathematics, 09.12.2020 16:40
Health, 09.12.2020 16:40
Mathematics, 09.12.2020 16:40