Answer:
A
Explanation:
i have to say A but im not sure this is hard
Answer:
nucleus.
The DNA unzips.
A strand of RNA is made.
The RNA moves to the cytoplasm.
A protein is produced.
The RNA leaves the ribosome.
Explanation:
The central dogma of molecular biology is an explanation of the flow of genetic information from DNA to protein within a biological system. It starts from replication in which DNA strands are duplicated. It goes toward transcription in which RNA strand is made from DNA in transcription. This mRNA moves toward the cytoplasm, outside the nucleus. T-RNA goes toward the ribosome and binds there to make protein from translation. After protein production, this rRNA leaves the ribosome.
Answer:A
Explanation:
The mass of an electron is equal to the mass of a neutron
Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron). The positive charge on a proton is equal in magnitude to the negative charge on an electron.
<span>Natural
selection has 4 processes.</span>
<span>Individuals looks different and have different
characteristics from another within their own species (genetic variation). Some
characteristics suits better for the environment, which has to be passed on
from one generation to the next. The humming birds with long bills will mate
with those that have that too so they'll produce offspring with long bills. </span>
<span>The
second process is over production of offspring. The humming birds produces lots
of offspring but only a few survives. </span>
<span>Another factor of natural selection is
struggle for existence, which leads to differential survival and reproduction.
There are environmental pressures, like not having enough space or food, for
example, humming birds compete fiercely for resources like nectar. Natural
selection will favor individuals that are more efficient at getting nectar and
natural selection will result in changes in wing shape which can allow them to
fly longer distance and affect the length and shape of bill for them to drink
nectar. Little changes may affect how well they feed and survive. Those who are
the fittest survives and are most likely to reproduce and pass on their
advantageous genes to their offspring. If the long bills are more advantageous
and can survive better in a particular environment, then overtime, those with
short bills will disappear because they can't survive and the entire population
would have long bills.</span>
Answer: Haemocoels
Explanation:
In the open circulatory system found in arthropods and mollusks, the heart pumps blood into a blood vessel which branches and opens in an internal structure called Haemocoels.
The haemocoel is a highly functional part because it allows
- organs and tissues to be bathed in blood,
- for exchange of materials to occur between the body cells and the blood.
- blood to eventually flows back to the heart.
