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bekas [8.4K]
3 years ago
5

A

Biology
1 answer:
EastWind [94]3 years ago
3 0
A series of paired statements that describe that various physical characteristics of different organisms is called DICHOTOMOUS KEY OR TAXONOMY KEY  
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Precipitation means things that _____________.
DENIUS [597]

Answer:

the action or process of precipitating a substance from a solution.

Explanation:

I hope this helps you!

4 0
3 years ago
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True or false? The Indian Ocean is the biggest ocean on Earth.
kow [346]
False. The Pacific Ocean is the largest. 
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4 years ago
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What can be used to determine the relative age of two rocks?
Ne4ueva [31]

Answer:

D

Explanation:

Relative Age Determination. Superposition of rock units is a very simple and straightforward method of relative age determination. The principle states that in a sequence of undeformed sedimentary rocks the oldest beds are at the bottom and the youngest ones are at the top.

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3 years ago
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Which contraceptive method is 100 percent effective at preventing pregnancy?
emmainna [20.7K]

The correct answer is D. Abstinence

Explanation:

A contraceptive method or birth control method refers to a method used to avoid pregnancy or reduce the probability of getting pregnant. From antiquity, there have been different contraceptive methods but only in the last decades, methods have been designed based on science and its effectiveness has been studied.

Because of this, nowadays there are many contraceptive methods such as pills, condom, and implants that are about 80% to 95% effective, sterilization that is a around 98% effective and natural methods that have a lower percentage of effectiveness. But the only method that has been proven as completely effective or 100% effective is abstinence because by avoiding any type of sexual intercourse it is virtually impossible an egg can be fertilized by a spermatozoid.

7 0
4 years ago
n cancer cells one allele of the tumor suppressor gene p53 is frequently mutated so that the protein is inactive, not produced,
artcher [175]

Answer:

If the cancer cell's DNA is sequenced than the anticipated results will be that the cytosines in or close to the promoter region will get methylated. It has been stated that in the cancer cells one allele of p53 is mutated and the other allele, however, of exhibiting an intact promoter, does not express the protein.  

Thus, it shows that the expression in the other allele gets suppressed by methylation rather than by mutation. Methylation generally takes place in CpG islands in or close to the promoter region and therefore inhibits transcription.  

5 0
3 years ago
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