Answer: It is necessary for the immune system to clearly distinguish foreign cells and proteins from those made by the body so that the immune system will be able to fight foreign cells and proteins and eliminate them from the body.
Explanation: The ability of the immune system to clearly distinguish foreign cells and proteins from those made by the body helps the body to identify pathogens that invade the body and trigger appropriate immune response to eliminate the foreign cells and proteins.
When the immune system of the body fails to distinguish foreign cells and proteins from those made by the body, the body launches an attack against its cells, that is the immune system triggers an autoimmune response in which attacks are launched against the cells of the body and destroy them. This condition in which the immune system recognizes the cells of the body as non-self and launches an attack against them is known as autoimmunity. Autoimmunity is the major cause of most degenerative diseases such as type I diabetes mellitus.
Answer:
producers that make their own organic matter from inorganic molecules
Explanation:
Phosynthetic organisms are those that capture solar energy and can be used in the production of organic compounds. Through this process they are able to make their own food based on something as simple as sunlight, the organisms that are in this group are: higher plants, algae, some bacteria, which can convert carbon dioxide into organic compounds and of these compounds reduce them into carbohydrates.
The energy necessary for this process to occur, is generated through the light of the same sun, which promotes the activity of these organisms for the preparation of organic compounds and their carbohydrates, which are used by cells as a source of Energy.
It is important to note that most of the foods that are consumed throughout the day and the fossil fuel that is found in nature, are a product of this process called photosynthesis. Photosynthetic organisms are considered to be the largest primary producers within the same trophic chain itself, since among them are those that produce oxygen, which are green plants, algae and some bacteria. But there are also organisms that produce photosynthesis and do not produce oxygen, among these are purple sulfur bacteria and green sulfur bacteria.
Answer:
D
Explanation:
This involves a dihybrid inheritance I.e. two genes are being passed on. During meiosis, specifically, the Prophase stage, homologous chromosomes (similar but non-identical chromosomes received from each parent) line side by side. According to the question, one chromosome contains A and B alleles and its homologue, received by the other parent carries a and b alleles. This means that the diploid individual has a genotype AaBb for that gene.
According to Mendel's law of independent assortment, the alleles separate independently of one another into gametes. I.e. allele A and a separates into the gametes without affecting alleles B and b of the other gene.
Crossing-over, which is the exchange of chromosomal segment occurs between the two homologues. Hence, the exchange of chromosomal segments containing alleles in the individual will possibly produce four gametes with the genotypes: AB, Ab, aB, ab.
Answer:
a,the ability to go from a single cell to multicellular organism
Your hypothesis is incorrect considering every day has the same length to it.
