1963038660
03.02.2020 •
Biology
Awoman treated her home with a pesticide that kills spiders. the first application killed 78% of the spiders. two months later she applied the pesticide again, but it only killed 45% of the spiders. what would best explain the decrease in the effectiveness of the pesticide?
a. the pesticide only works on mature spiders.
b. once spiders learned how to avoid the pesticide they taught others.
c. the surviving spiders were naturally resistant to the pesticide and that resistance was inherited by their offspring.
d. some of the spiders became able to digest the pesticide due to mutation of the digestive tract.
Solved
Show answers
More tips
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- G Goods and services How to sew a ribbon: Tips for beginners...
- F Food and Cooking How to Make Mayonnaise at Home? Secrets of Homemade Mayonnaise...
- C Computers and Internet Which Phone is Best for Internet Surfing?...
- F Food and Cooking Everything You Need to Know About Pasta...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
Answers on questions: Biology
- H History Throughout its history, ukraine’s location and natural resources have attracted which? investors invaders scholars merchants...
- P Physics An average person generates heat at a rate of 84 wwhile resting. assuming one-quarter of this heat is lost fromthe head and disregarding radiation, determine the averagesurface...
- M Mathematics How would u rewrite 4/5 and 1 2/3...
- B Biology Match the scenario to the career it describes. 1. Geoff makes sure that a private business complies with laws protecting deer wildlife biologist 2. Kara calls the state...
Ответ:
Option C, the surviving spiders were naturally resistant to the pesticide and that resistance was inherited by their offspring.
Explanation:
As per the Darwin's theory, the fittest of all survive and hence the spiders that were the fittest at the time of first application of pesticide survived. Being fittest means that they have learned how to survive in an environment consisting of pesticide/or were naturally resistant to the pesticide.
After the first interaction with pesticide, the remaining spiders evolved further with course of time to resist the effect of pesticide. Now when these evolved spiders reproduced, the new born individuals had inbuilt resistance to the similar type of pesticide. This is the reason why only 45 percent spiders died during the application of pesticide for the second time.
Option C is correct.
Ответ:
13)El 97.5% del agua en la tierra se encuentra en los océanos y mares de agua salada , unicamente el restante 2.5% es agua dulce . Del total de agua dulce en el mundo, 69% se encuentra en los polos y en las cumbres de las montañas mas altas y se encuentra en un estado sólido.
14)El agua dulce representa únicamente el 2,5% del agua de la Tierra y se encuentra en mayor parte congelada en glaciares y casquetes glaciares. Aproximadamente el 96% del agua dulce en estado líquido se localiza en zonas subterráneas y la pequeña fracción restante se encuentra en la superficie o en la atmósfera.
Explanation: