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m_a_m_a [10]
3 years ago
11

3. How does genetic variation allow humans to survive long-term? Which

Chemistry
1 answer:
Fynjy0 [20]3 years ago
6 0

Answer:

more genetic variation within a population usually enables more phenotypic variation.

Explanation:

Because natural selection acts directly only on phenotypes,  Some new alleles increase an organism's ability to survive and reproduce, which then ensures the survival of the allele in the population.

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Which formula can represent hydrogen ions in an aqueous solution?
faltersainse [42]

Answer:

H30+(aq)

Explanation:

im almost postive this is correct ,but if not its OH-(aq)

6 0
3 years ago
Which of the following became a major drawback to using ice blocks for cooling food? availability expense unsanitary ice storage
son4ous [18]
<span> Ice was soon being harvested from contaminated water sources. Microbes in the ice invaded the food and people became ill
</span>so <span>unsanitary ice is your answer i hope this helps</span>
7 0
4 years ago
Read 2 more answers
Carboxylic acids and alcohols react via dehydration and condensation to produce a/an _______ and water.
avanturin [10]

Answer:

ester

Explanation:

Carboxylic acids and alcohols react in the presence of strong acid to produce an ester and water. The two carbon chains come together, which is the condensation, and then water is generated, which is dehydration. The resulting compound is an ester.

4 0
3 years ago
Which of the following atoms is MOST likely to lose an electron?<br> Li<br> F<br> C<br> Rb
saveliy_v [14]

The atom that is most likely to lose an electron is lithium (Li).

<h3>What is electronegativity?</h3>

Electronegativity is the tendency, or a measure of the ability, of an atom or molecule to attract electrons when forming bonds.

On the other hand, electropositivity is the tendency of an atom to release electrons to form a chemical bond.

Chemical elements that lose electrons become positively charged while elements that gain electrons become negatively charged.

Metals are most likely to lose electrons to form positive ions. Examples of metals are lithium in group 1, calcium in group 2, aluminium in group 3 etc.

Learn more about electropositivity at: brainly.com/question/17762711

#SPJ1

8 0
1 year ago
A radioactive isotope of potassium (k) has a half-life of 20 minutes. if a 43 gram sample of this isotope is allowed to decay fo
Ksenya-84 [330]

Hello!

The half-life is the time of half-disintegration, it is the time in which half of the atoms of an isotope disintegrate.

We have the following data:

mo (initial mass) = 43 g

m (final mass after time T) = ? (in g)

x (number of periods elapsed) = ?

P (Half-life) = 20 minutes

T (Elapsed time for sample reduction) = 80 minutes

Let's find the number of periods elapsed (x), let us see:

T = x*P

80 = x*20

80 = 20\:x

20\:x = 80

x = \dfrac{80}{20}

\boxed{x = 4}

Now, let's find the final mass (m) of this isotope after the elapsed time, let's see:

m =  \dfrac{m_o}{2^x}

m =  \dfrac{43}{2^{4}}

m = \dfrac{43}{16}

\boxed{\boxed{m = 2.6875\:g}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

8 0
4 years ago
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