Answer: Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. ... Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell.
Explanation:
The answer is B. Cross-pollination occurs when pollen fertilizes female egg cells on the same flower.
The answer is stabilizing selection.
<span>Sickle-cell anemia is a recessive disorder caused by the presence of two recessive alleles "s", so genotype is "ss". This disorder is characterized by sickle hemoglobin. In an area with malaria, heterozygous individuals "Ss" (with one dominant allele and one recessive allele) have an advantage. These individuals will have both normal and sickle hemoglobin. But pathogen that causes malaria affect only normal hemoglobin, so heterozygous individuals will have half of the hemoglobin resistant to the pathogen and those individuals are resistant to malaria.</span>
Stabilizing selection favors heterozygotes Ss, disruptive selection favors dominant (SS) and recessive (ss) homozygotes, while directional selection favors dominant (SS) or recessive (ss) homozygote. Since in this example, people with genotype Ss (heterozygotes) are in advantage, then this is an example of stabilizing selection.
If<span> you </span>water<span> a </span>plant<span> with </span>salt water<span>, it will wilt, and will eventually die. This is due to the fact that the </span>salt water<span> is a hypertonic solution when compared to the </span>plant<span> cells, and </span>water<span> inside the </span>plant<span> cells will diffuse by osmosis out of the cells in order to reduce the concentration of the </span>salt<span> solution.</span>
Digestion takes place inside Iysosomes containing digestive enzymes. Hope I helped!
