Answer:
A
Explanation:
There is no much more to say than the letter A describes the process of facilitated diffusion.
The normal diffusion ocurres when the solute passes the membrane through the space of the double layer of phospholipids. Particles that are small and apolar can pass trough the membrane without problems.
For bigger or polar particles we need to use a protein system to help them pass into the cytoplasm. That's what we call Facilitated Difusion.
About the other options:
B) That's the explanation about active transport. That happen for every particle who is going against the gradient of concentration.
C) Again: if we are talking about diffusion, there is no energy needed.
D) The Water Molecules suffer the process os osmotic pressure. Water deslocates to the higher gradient of concentration - contraty what the other particles do.
The rigth answer is C (B ==> A ==> C)
The 3 images represent the key stages of mitosis.
Image B represents the beginning of the anaphase, where the chromosomes are aligned in the equatorial plate.
The image A represents the anaphase where the chromosomes are separated on both sides of the cell.
The image C represents the telophase or one can observe in the middle the formation of the division furrow to allow the cell to cut itself in two.
Answer:
a temporary oxygen shortage in the body tissues arising from exercise.
Answer:
The classic tool to predict the patterns of heredity is using a <u>Punnett Square</u>.
Explanation:
In genetics, a trait can be considered dominant or recessive. Since the important discoveries of Gregor Mendel, scientists use a <u>capital letter (D) to indicate a trait is dominant, and a lowcase letter (d) to show a trait is recessive. </u>
Assuming that a scientist knows the genotype for the desired trait they want to predict on the offpsring, a Punnett Square is<u> a reliable tool and a graphic representation that permits them to visualize the potential features of the offspring by showing how the alleles may be exhibited and passed on the offspring and will determine the possible combination of genotypes.</u>
<em>How does it work?</em>
For example, as we can observe in the image below, both parents are homozygous for a trait <em>PP=Purple; pp=white</em>. P is dominant and p is recessive (the color purple will be dominant, and the white will be recessive). So, we put one parent's genotype in the top row (PP) and the other parent's genotype in the left column (pp) and combine one of each letters on the squares, <em>i.e</em>. one of each parent's alleles. Then, we can observe in the results that 3 of the offspring will exhibit the purple color (PP, Pp, Pp) and only one will exhibit the white recessive color (pp); or more properly known as a genotypic ratio of 3:1.
The factors that most directly affect blood flow are blood pressure, blood volume, resistance and activity level.
true