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
irakobra [83]
3 years ago
7

_____ is the main energy source for all life on earth. Chlorophyll Water Sunlight Nitrogen

Biology
2 answers:
Amanda [17]3 years ago
8 0

Answer:

sunlight

Explanation:

The sun powers everything, it powers plants, humans and other mammals also need sunlight, it's proven. The sun even powers houses and cars, so yeahh

mafiozo [28]3 years ago
7 0

Answer:

sunlight

Explanation:

You might be interested in
Human abo blood groups are determined by a single gene with 3 alleles: a, b, and o. in a sample of 300 individuals, 100 are bloo
KengaRu [80]
Allele frequency is determined by looking at the dominant and recessive allele of a genotype. 
Using the given, we can come up with the following computation for the allele frequency:
allele A = 100/300 allele B = 50/300 allele O = 150/300
Hence, the frequency of allele A is 0.33 or 33%, allele B is .17 or 17% and allele O is 0.50 or 50%.  
5 0
3 years ago
Mars had an orbital period of 1.88 years. In two or more complete sentences,explain how to calculate the average distance from m
Vanyuwa [196]
This is an interesting problem involving astronomy, in fact, simple physics.
Let r=distance of sun to mars, in metres

<span>Mars had an orbital period of 1.88 years.
=>
tangential velocity, v, of the planet, in m/s is
v=\frac{2\pi{r}}{T}
</span>=\frac{2\pi{r}}{1.88*365.25*86400} m/s, accounting for leap years
=3.371*10^{-8}\pi{r}   m/s

The centripetal force, Fc, generated is
Fc=\frac{mv^2}{r}   
        where m=mass of mars = 6.39*10^(24) kg
=\frac{mv^2}{r}
=\frac{6.39*10^{24}v^2}{r}
=7.26168*10^9\pi^2r

The gravitation pull from the sun, Fg, is given by
Fg=\frac{GMm}{r^2}
    where G=grav. const., =6.67408*10^(-11) m^3<span> kg^(</span>-1)<span> s^(</span>-2)
              M=mass of sun=1.989*10^(30) kg
=\frac{6.67408*10^{-11}1.989*10^{30}6.39*10^{24}}{r^2}
=\frac{8.4826*10^44}{r^2}

Since the radial distance is in equilibrium, the average distance, r can be found by equation Fc=Fg and solving for r:
Fc=Fg
=>
7.26168*10^9\pi^2r=\frac{8.4826*10^44}{r^2}
Solving for the real root:
r^3=\frac{8.48256*10^44}{7.26168*10^9*%pi^2}
=\frac{1.1681263*10^{35}}{\pi^2}
=2.279*10^11 m


5 0
3 years ago
The process of making multiple copies of a gene by inserting it into a host genome and culturing the host is an example of
tiny-mole [99]
The process of making multiple copies of a gene by inserting it into a host genome and culturing the host is an example of gene cloning.
8 0
3 years ago
Geneticists have determined that the majority of individuals in an isolated island population have blood type
oee [108]

Question continuation;

..........type B. Type A is found to be more common in the mainland population from which the island was settled.

How could a geneticist best explain the dominance of blood type B in the island population?


Multiple choices;

A. Random mutations have occurred in the island population.

B. Genetic drift has reduced the frequency of type A individuals.

C. Natural selection has only occurred in the mainland population.

D. Environmental conditions on the island are less favorable for type B individuals.


Answer;

B. Genetic drift has reduced the frequency of type A individuals.


Explanation;

-Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance.

-It occurs in all populations of non-infinite size, but its effects are strongest in small populations.

8 0
3 years ago
Read 2 more answers
Give three examples of biomagnification ! Please help
Kaylis [27]

Answer:mercury, lead, chromium

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • What two vital functions does the lymphatic system perform in the body ?
    7·1 answer
  • What is responsible for the cohesive property of water
    5·1 answer
  • Why do hydras use its stinging cells?
    5·2 answers
  • How would the membrane shown in the transparency behave if its fatty acid tails consisted mostly of unsaturated fatty acids?
    5·1 answer
  • This is science.<br> I need help
    5·1 answer
  • 15 POINTS !!!!!!!!!!!!!!!<br><br>ANSWER!!!!!!!!!!!!!!
    7·2 answers
  • Which of the following methods is the most effective in determining muscular strength if you do not want to worry about selectin
    14·2 answers
  • After taking antibiotics for several weeks, a patient develops a severe bacterial infection in his intestines. The doctor claims
    15·2 answers
  • Modern humans are the product of evolutionary processes which have occurred over millions of years . True or false?
    5·1 answer
  • Fungi, many birds, and a wide variety of insects all share the what of a tree in the forest.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!