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weeeeeb [17]
3 years ago
5

Nelly was reading about ecological pesticides. She found a website that said that skeletons of some organisms settle as sediment

s in the ocean. They are then used as pesticides because they are abrasive against pests. Which organism is the article discussing?
A. dinoflagellates
B. diatoms
C. green algae
D. euglenoids
E. amoeba
Biology
1 answer:
Mnenie [13.5K]3 years ago
7 0

The answer is B. When diatoms die and fall off the ocean column to the ocean floor, they become part of sediments over time. When they are mined and exposed, they turn to a diatomite. Diatomaceous earth is significant as a pest repellant because of its hygroscopic property and has very abrasive particle hence it absorbs the water-protective fats and oils from the outermost layer of insects.

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WHOEVER ANSWERS FIRST GET A BRAINLY!!!!Provide a reason why no 2 communities are ever the same. Support your answer with an exam
Advocard [28]

Answer:

No two communities are the same because each one has something specific to them whether it is house structure, rules of the community, how big the community is, and the people that live there.

Explanation:

A great example of this is Weston, FL and Pembroke Pines, FL. In Weston you will find higher class people living there such as celebrities and athletes. The best community to use as a comparison is Botanica Weston. There are mansions in that neighborhood along with many sport icons living there. In Pembroke Pines, it is more of a family based city. In the community Pembroke Falls, you will see more family type houses and a large clubhouse with a pool, game room, and event room to host parties in. Each community has a different identity and no two communities are the same.

4 0
2 years ago
The fusion of a _______________ and a _________________ produces a zygote with 46 (2n) chromosome number.
Nonamiya [84]

Answer:

The fusion of a egg and a sperm produces a zygote with 46 (2n) chromosome number.

3 0
2 years ago
A particular triplet of bases in the template strand of DNA is 5' AGT 3'. The corresponding codon for the mRNA transcribed is __
earnstyle [38]

Answer:

The correct answer is 3' UCA 5'

Explanation:

The rule of pairing of base-pair says that A and T base pairs with each other with two hydrogen bonds and G and C base pairs with each other with three hydrogen bonds in DNA. In the case of RNA Uracil comes at the place of thymine that means uracil replaces thymine.

Therefore according to this base-pairing rule the corresponding codon of mRNA transcribes from DNA codon 5' AGT 3' will be 3' UCA 5' as U came in place of A nucleotide, C comes in place of G nucleotide, and A comes in place of T nucleotide.  

Therefore the correct answer is 3' UCA 5'.

4 0
3 years ago
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Answer:

An experiment that directly test the hypothesis.

Explanation:

Although there is quite a bit missing from Mary's scientific investigation, the thing that sticks out the most is the fact that Mary is missing an experiment. Mary's hypothesis states that people would fall asleep faster if their room color were to be painted blue. To prove that her hypothesis is true, Mary would need to conduct an experiment to see whether or not she was correct.

6 0
2 years ago
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