Explanation:
biotech. engineering, there are a lot of biotech engineers, bcause they no how to cross breed corn, beans, wheat, etc....2 make plants 2 resist drought, stronger against pests, etc....
Answer;
-Allele frequency change
In single-gene traits, natural selection can lead to allele frequency change.
Explanation;
-Allele frequencies can change over time within a single population, and frequently differ between populations. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.
-Random forces lead to genetic drift. Sometimes, there can be random fluctuations in the numbers of alleles in a population. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time.
A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt. A stream of any volume may assume a meandering course, alternately eroding sediments from the outside of a bend and depositing them on the inside.
The body's first line of defense is actually the non-specific immune system which is also called innate immunity.
Innate immunity employs both physical and chemical barriers that form the first line of defense. These include:
1. The intact skin. The skin is made up of keratin in its outermost layer. Keratin makes skin tough and resistant and pathogens usually cannot penetrate unless the skin is broken.
2. The mucus membrane. This is a thin membrane that forms a protective lining inside many organs and other parts of the body such as the trachea. Mucus produced by the membrane traps bacteria and other harmful particle which are then expelled from the body.
3. Tears. Tears from our eyes contain lysozyme, a chemical that kills bacteria.
If the pathogen gets through or evades these types of defenses, then it is dealt with by the second line of defense which is called specific immunity or acquired immunity. It is here that white blood cells namely the B lymphocytes and T lymphocytes attack, kill or neutralize pathogens.
Answer:
3)Metabotropic receptors open an ion channel through the action of a G protein
Explanation:
Postsynaptic inhibition and excitation are similar, or much the same. Neurotransmitters are getting attached to receptors and they are opening or closing ion channels that are in the cell and since that they are similar this statement is false.
Iigand-gated ion channels are type of membrane-bound receptors so this statement is also false.
Binding neurotransmitters and metabotropic receptors can activate G-proteins. Then, the G-proteins interact with other channels or they can bind to some other protein.
