Answer:
The very bottom one
Explanation:
Thymine and Adenine always pair together while cytosine and guanine go together.
The whole earth is at its farthest distance from the sun in the summer (July)
the force that holds any object in orbit is gravity
a star and multiple planets held together by gravity is called a solar system
Kepler proposed that gravity kept the planets in their orbits
Answer:
Viruses are not living things. One reason viruses are not alive is because they require a host to survive and reproduce. A second reason a virus is not alive is because they do not stimuli. A final reason that a virus is not alive is that they are not made up of cells. All living things can reproduce without a host, are made up of cells and react to stimuli except viruses, so they are not living.
The object is balanced against standard units of mass
Answer:
Option B and C
Explanation:
When a population is said to be in Hardy Weinberg’s Equilibrium, it is assumed to obey the following assumptions –
a) There is random mating among the organism
b) The mating should not be selective and in order to achieve so the population size must be infinite
c) There should be no loss or gain of allele thereby assuring that there is no selection, mutation, migration etc.
d) Also there must be no crossing among organism belonging to different generation
With all such assumptions, the allele frequencies will remain either constant thereby producing infertile recessive homozygous species or fertile heterozyous species.
Hence, option B and C are correct