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icang [17]
3 years ago
14

In 3-5 sentences explain, why when DDT was released for insect control it had to be banned in 1972 and what this

Biology
1 answer:
TEA [102]3 years ago
5 0

Answer:

The decline was attributed to a number of factors including Increased insect resistance, the development of more effective alternative pesticides, public and user concern about negative environmental side effects—and a government ban on DDT use since 1969--all contributed to the decline.

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Please choose the answer that describes the scientific notation for 3,134,000,000
miskamm [114]
The scientific notation for that is

3.134 * 10^9

This is because you move 9 places then put it to a exponent.
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Which part of a seed acts as the food source for the seed as it grows underground?
liubo4ka [24]
The answer is a cotyledon
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3 years ago
To create a simulation of 20,000 sheep grazing in an isolated valley, a scientist needs to determine the average amount of grass
Norma-Jean [14]
A. Its best to divide the amount of grass eaten by 20,000, he can get a rough estimate this way quickly so reach an average.
7 0
3 years ago
How old does a whale shark need to be before it can reproduce?
spin [16.1K]
Whale shark reproduction can be by laying eggs that is also called oviparity where the female deposits eggs in the algae or rocks. The embryos formed inside the eggs and feed on the yolk. They can also reproduce through viviparity which means by giving birth just like mammals wherein they are born fully formed. This reproduction process is through the placental link to the eggs wherein the yolk sac grows within a placenta that is connected to the wall of the uterus and gives the offspring the nutrients vital for their growth. Another reproduction process is through Ovoviviparity where eggs are formed inside the mother where the eggs hatch within the oviduct of the female and the young feed on the egg yolk of the yolk sac and the fluids that the walls of the oviduct secrete since the mother does not provide any food directly. Once the eggs are ready, eggs hatch inside the mother and it pups keep getting food from their surroundings until they are fully developed. The number of their offspring and the length of the gestation periods varies according to the species. Probably a female of some species may have only two offspring, but some other species may have between forty and eighty. The small sharks have shorter gestation period compared to large species that last from three to four months or up to more than two years. The large ones reproduce every two years, while the little ones have offspring each year. This is why the reproduction process of whale shark is not known in detail.

3 0
4 years ago
What is the name of the approach to biological research that integrates data from multiple levels of complexity
Tanzania [10]

Answer:

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Systems biology can be defined as a methodology whose interest is to understand the high scale levels of complexity in biology (i.e. organism level, tissue level, cell function, etc) by integrating information/data from different sources, and thus examine the interaction between biological components. This approach is contrary to reductionism, which is another approach used in biology research. Therefore, systems biology is a holistic approach aimed at modeling complex biology systems by applying computational and mathematical methods, enabling to understand biological systems.

8 0
3 years ago
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