multiple choice question

Answer:

i hope it will help u bestie

Explanation:

Each year, many people look forward to the winter solstice, which usually falls on December 21 and is the shortest day of the year, because they know after that, there will be progressively more daylight each day.

Answer:

O Muscle tissue will contract uncontrollably.

Explanation:

Multiple sclerosis, also known as encephalomyelitis disseminata, is a disease that affects the brain and spinal cord. Some of the most common symptoms of multiple sclerosis include vision problems, arm or leg movement and balance. This disease occurs when the immune system attacks the myelin sheath that covers nerve cells in the brain and spinal cord, causing inflammation and subsequent damage of the sheath and the nerve fibers it surrounds. Multiple sclerosis may cause muscle twitches when nerve fibers are damaged, thereby disrupting the signaling between nerves and muscles.

Answer:

B. The vacuole is not full and the plant is wilted

Explanation:

When a plant cell is placed in a hypertonic solution, the water inside the cells is drawn out by osmosis. The vacuoles decrease in size. The cytoplasm also shrinks away from the cellulose cell wall and plasmolysis occurs. This causes a lack of structure for the plant and causes it to wilt, or become flaccid.

Answer:

I think it is B

Explanation:

Im sorry if i am wrong

Answer:

Smaller

Explanation:

The human blood cell has a smaller percentage of solute concentration than the solution it was placed into. This means that the cell is hypotonic in comparison to the solution, and the solution is hypertonic compared to the cell. When a cell is placed in a hypertonic solution it undergoes crenation, meaning it shrivels up. Water moves from the lower solute concentration to the higher solute concentration. The water inside the cell moves outside to the hypertonic solution. This causes the cell to become smaller.

Answer:

Autosomal Dominant Inheritance

Explanation:

Answer:

it is a failure of tolerance (self-tolerance) and specificity (recognition)

Explanation:

Type 1 diabetes is a chronic disease caused by the selective destruction of β cells that are involved in the production of insulin in the pancreas. Type 1 diabetes can be classified into two types: Type 1A diabetes (the immune form of the disease) and Type 1B diabetes (the non-immune form of the disease). Type 1A diabetes is considered an autoimmune disorder where immune responses against pathogens suffer a failure of tolerance to antigens in the β-cells of the pancreatic islets. Thus, Type 1A diabetes is characterized by the process of recognition of β-cell antigens (autoantigens) by the immune system. This disease is often caused by genetic factors associated with mutations in the human leukocyte antigen (HLA) class II region located on chromosome 6.

Answer:

The threshold photon energy for DNA damage = 4.28 eV

Explanation:

According to the Planck - Einstein's equation, the energy of a photon, E is proportional to its frequency; E = hf where f is frequency and h is Planck's constant.

Also, frequency, f = velocity /wavelength

f = c/λ where c is the velocity of light

E = hc/λ

h = 6.63 × 10^-³⁴ Js;

c = 3.0 × 10⁸ m/s;

Threshold wavelength, λ = 290 nm = 2.9 × 10^-7 m

E = (6.63 × 10^-³⁴ × 3.0 × 10⁸) / 2.9 × 10^-⁷

E = 6.85 × 10^-¹⁹ J

1 ev = 1.602 × 10^-¹⁹ J

6.85 × 10^-¹⁹ J = 6.85 × 10^-¹⁹ J × 1 eV / 1.602 × 10^-¹⁹ J = 4.28 eV

Therefore, the threshold photon energy for DNA damage = 4.28 eV

What is the essay’s theme?

Answer: Any of a group of steroid hormones produced in the adrenal cortex or made synthetically.

Explanation: If you mean "corticoid", then that's what it is.

Answer:

Two kidneys

Explanation:

Most people have two kidneys, however, it is possible to live a healthy and active life with only one functioning kidney.

Answer:

Solution:

plant's takes carbon dioxide ,water ,sunlight,and minerals and produce glucose and excrete out oxygen:

Answer:

A

Explanation:

Answer:

The answer is D

Explanation:

Answer:

A. By releasing toxins that poison your cells

B. By using your cells to make copies of themselves

Explanation:

Within the body, bacteria can divide (multiply) and kill host cells by disrupting their normal functioning. Moreover, bacteria secrete toxins that are able to destroy host cells' metabolic machinery.  For instance, many bacteria synthesize exoenzymes and interferons that disrupt and destroy host cells. Bacterial toxins can be synthesized internally in order to develop sensitivity through antigenic properties.

Answer:

the total energy must remain the same,but energy can change forms and be transferred within the system

Answer:

The somatic nervous system has sensory and motor pathways, whereas the autonomic nervous system only has motor pathways. The autonomic nervous system controls internal organs and glands, while the somatic nervous system controls muscles and movement.

Explanation:

Answer:

Matter cannot be created nor destoyed

Answer:

1. Beak shape and depth

2. Long beaks; short beaks

3. Tall beaks; shallow beaks

4. Protein

5. Genes; macroevolution

Explanation:

Two genes, CaM and BMP4, control beak shape and depth, respectively, in finches. High levels of CaM expression will result in long beaks, whereas low levels of CaM expression will result in short beaks. High levels of BMP4 expression will result in tall or deep beaks, whereas low levels of BMP4 expression will result in shallow beaks. Therefore, the degree of expression and, consequently, the amount of protein produced, affects beak development in utero. Therefore, small changes to the genes within a developing embryo could result in the formation of new species, providing both evidence and a mechanism for macroevolution .

Note:

The BMP4 gene is the gene for Bone morphological protein 4. It determines how deep or tall the beak will be.

The CaM gene is the gene for Calmodulin. It regulates how long a beak will grow.

Answer:

1) Topographic maps show contours, elevation, forest cover, marsh, pipelines, power transmission lines, buildings and various types of boundary lines such as international, provincial and administrative, and many others. (Answer: Elevation)

2) Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. The diagram illustrates how contour lines show relief by joining points of equal elevation. (Answer: Contour Line)

Answer:

the answer is d, student 2 exercises more often then student 1. he also has better sleep.

Explanation:

Answer:

Spleen

Explanation:

The is because the spleen is an organ found in upper section of the abdomen spleen acts as a filterand it help to remove old and damaged cells . It also play a major role in controlling the amount of blood and blood cells that move round the body. The spleen also helps remove pathogens. It contains white blood cells called lymphocytes and macrophages.