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Dafna11 [192]
3 years ago
11

Why must the use of pesticides be carefully controlled?

Biology
2 answers:
USPshnik [31]3 years ago
6 0
Because if to much is used the extra pesticide will run get picked up by the water the next time it rains and the run off will go into the rivers and streams and harm the animals that live and drink from the streams and rivers
lara [203]3 years ago
3 0
Some pesticides are very harmful to people.
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Speciation is the process by which new species are formed. Which of the following circumstances is most likely to lead to specia
trapecia [35]

Answer is A. A population becomes separated by environmental factors into two groups that do not reproduce with one another.

When a population of a species become geographically separated then gene flow between them stops. Over a period of time, the population may become genetically different in response to the natural selection due to different environments. Selection and genetic drift will act differently on these two separated populations. This will results into two separate species. This type of speciation is called allopatric speciation.

4 0
3 years ago
What distinguishes the savanna and grassland biomes?<br>the aswer is a
elena-s [515]
Hello! THere are many differences between a grassland and a savanna. For one, a savanna is a grassland, however, A savanna is usually very dry. A savanna also has very few trees, while grasslands can be plush with many trees. Grasslands could also be in mountains while savannas are vast dryer lands with animals who live in dry weather. Grasslands also contain a lot of water sources like lakes, rivers, ponds, and savannas usually don't. Those are just a few o the many differences between them! 

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SuperHelperThingy
5 0
2 years ago
Area of low pressure where air masses meet and rise
IRISSAK [1]

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5 0
3 years ago
Which of the following is/are true?
dem82 [27]

Answer: option B) Sympatric speciation is best described as a random event that disrupts the allele frequencies in a population

Explanation:

Sympatric speciation is an event/situation whereby organisms of the same species:

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- DO NOT interbreed, but select a sexual mate from a much diverse territory to yield new species or offsprings.

This sexual selection then results in generations of offsprings that are genetically different from the rest of the same species due to uneven gene flow or disruption of alleles among the population of same species.

Thus, only option B is true.

4 0
2 years ago
Which of the following attributes is common to both prokaryotic cells and eukaryotic cells?
yarga [219]

Answer:

b. the use of DNA as the information storage molecule

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Prokaryotic cells are the ones that lack the membrane-bound organelles and well-defined nucleus. Eukaryotic cells have the nucleus and other membrane-bound organelles. Most of the prokaryotic cells are smaller in size as compared to eukaryotic cells. Despite these differences, both prokaryotic and eukaryotic cells have DNA as their genetic material. DNA serves to store genetic information in both types of cells.

8 0
2 years ago
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