1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
diamong [38]
3 years ago
9

Which conditions are necessary for natural selection? Check all that apply.

Chemistry
2 answers:
Goshia [24]3 years ago
8 0

Answer:

BCE, person above is right! got a 100.

Explanation:

zepelin [54]3 years ago
3 0

Answer:

Populations have genetic variation.

The environment changes.

Organisms must have specific traits in order to survive and reproduce.

Explanation:

Natural selection provides an advantage during an adverse condition for organisms that have a rich genetic variation in their population.

Also, environmental changes induced natural selection whereby organisms must adapt to changes around them.

For organisms to survive, they must have specific traits that gives them a competitive reproductive advantage.

You might be interested in
Help please i am very dumb
UkoKoshka [18]

Answer:

1. 25%

2. 1.25

3. 1

Explanation:

Be sure to look at the x and y axis to answer these questions. All you need to do is look at the graph.

- Hope that helps! Please let me know if you need further explanation.

7 0
3 years ago
How to balance <br> Mg + O2 &gt; MgO
katovenus [111]
<span>Mg + O2 > MgO. In reactant side, 2 O atoms and 1 Mg are present. In product side, 1 Mg and O atoms are present. Put 2 in product side to balance O atoms and 2 at Mg in reactant side to balance Mg atoms. Therefore the balanced equation becomes, 2Mg + O2 ----> 2MgO. Hope it helps.</span>
5 0
3 years ago
At a given temperature the vapor pressure of pure liquid benzene and toluene are 745 torr and 290 torr, respectively. A solution
IRISSAK [1]

Answer:

Vapour pressure of benzene over the solution is 253 torr

Explanation:

According to Raoult's law for a mixture of two liquid component A and B-

vapour pressure of a component (A) in solution = x_{A}\times P_{A}^{0}

vapour pressure of a component (B) in solution = x_{B}\times P_{B}^{0}

Where x_{A},x_{B} are mole fraction of component A and B in solution respectively

P_{A}^{0},P_{B}^{0} are vapour pressure of pure A and pure B respectively

Here mole fraction of benzene in solution is 0.340 and vapour pressure of pure benzene is 745 torr

So, vapour pressure of benzene in solution = 0.340\times 745 torr

                                                                         = 253 torr

7 0
3 years ago
Chem help<br>calculate the wavelength of an electromagnetic wave with a frequency of (in pic)​
olchik [2.2K]

we have,

wavelenght=c/f

where c= 3×10^8 m/s

f=6.3×10^12 s^-1

so wavelength=(3×10^8)/(6.3×10^12)

=0.476×10^-4 m

4 0
3 years ago
NEED HELP QUICKLY!!! How many moles are in each of the following?
oksano4ka [1.4K]

Answer: a. 0.26mol

b. 0.000479mol

c. 1.12mol

Explanation: Please see attachment for explanation

6 0
3 years ago
Other questions:
  • Using Gibbs Equation, dU=TdS-pdV show that (dS/dV) at a constant U =P/T. The reciprocal of (dS/dU)v = 1/T.
    15·1 answer
  • A 4 gram metal object displaces 2 mL of water in a graduated cylinder. What is the density of the metal object?
    13·1 answer
  • A bond formed by electrical attraction between two oppositely charged ions is called
    15·1 answer
  • 25. Why does increasing concentration usually increase reaction rate?
    8·1 answer
  • An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor
    12·1 answer
  • Will mark branliest!! and 50 points for right answer!
    13·1 answer
  • In a laboratory, bunsen burner is used to increase the temperature of lime from 10 °C to 50 °C with the thermal energy of 80000
    6·1 answer
  • Give the RNA complementary strands of the original strands listed below:
    9·1 answer
  • 1+1 hahahahahhhahahaahahahahahahahahahahahahahaha why u dumb
    7·2 answers
  • Acids which contain only hydrogen and a single other element are referred to as.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!