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Anvisha [2.4K]
3 years ago
14

DDT is a pesticide that has been used worldwide over the past 50 years. DDT is used to prevent insects from destroying crops and

as an insecticide used to kill disease-carrying insects. In 1972, the U.S. Environmental Protection Agency (EPA) began monitoring DDT usage. They conducted studies that analyzed ice layers from existing glaciers and these studies revealed that DDT was at its highest recorded levels 10 years after it was banned from being used. Which statement best describes why environmental monitoring for DDT was performed? Group of answer choices
A. To evaluate in what ways DDT impacts an ecosystem
B. To determine if DDT would cause serious harm to human populations
C. To predict if all chemicals are harmful to local pollinator insect populations
D. To ensure all chemicals are banned as soon as possible to protect public health
Biology
1 answer:
olga2289 [7]3 years ago
6 0

Answer:

I think B or C but mainly C

Explanation:

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After mitosis, how many chromosomes do the new cells have compared to the original?
irakobra [83]

Answer:

The same

Explanation:

In mitosis, genetically identical daughter cells are created. In meiosis the number of chromosomes is half as many as the original cell

6 0
3 years ago
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How do organisms use different types of carbon compounds?
fgiga [73]
<span>Carbon is the building blocks of all living molecules. With the ability to form carbon-carbon bonds, many different compounds formed into different structures can be used for different purposes such as macromolecules.  </span>
6 0
3 years ago
When a cold can of soda is insulated, the heat flow into the can on a hot day ____.
maksim [4K]
The word insulate means to protect from heat, cold,...
So when a can is insulated, means that is protected from heat.
So the answer is:
C. stays the same :)))
I hope this is helpful
have a nice day
4 0
3 years ago
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What functions do proteins perform in the cell membrane?
kumpel [21]

Answer:

A) they help transport some substances through the membrane.

Explanation:

The membrane proteins that span the bilayer of phospholipids help in the transport of polar, large and charged substances across the membrane. The nonpolar core of the membrane does not allow these charged and polar substances to pass through. Proteins serving as channels form pores to allow movement of the specific substances.  

On the other hand, carrier transport proteins of the membrane bind to the substances present at one side of the membrane and deliver them to the opposite side.

4 0
3 years ago
The sporophyte of an unknown plant species grows as a separate plant than the gametophyte. The plant produces both female and fl
N76 [4]

Answer:

The correct answer would be "The plant is a fern, and sporophyte is its dominant phase".

Ferns refer to the lower plants which do not bear flowers, have leafy or feathery fronds, and they reproduce by spores.

They show alternation of generation in which sporophyte is the dominant stage.

The mature diploid sporophyte releases haploid spores with the help of meiotic divisions.

The haploid spore divides by mitotic division and matures into a haploid gametophyte. The single gametophyte bears antheridium and archegonium which release flagellated male gametes and egg (female gamete) respectively with the help of mitotic division.

The gametes fertilize to produce a diploid zygote.

The zygote divides mitotically and matures into the diploid sporophyte.

4 0
3 years ago
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