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Volgvan
3 years ago
14

Cells differ from viruses in that only cells -

Biology
1 answer:
Andre45 [30]3 years ago
6 0

Answer:

Only cells contain cytoplasm

Explanation:

Viruses are microscopic creatures (not alive though), that can use genetic material such as RNA or DNA, just like cells.

About protective covering, viruses use a capsule to protect this genetic materials, while cells use the cell membrane and the cell wall (like plants and some bacteria).

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According to the data above, humans exhibit a high chance of surviving into old age.
Rom4ik [11]

Based on the data provided, we can conclude that the graph in question corresponds to the K-selected theory in regards to the human species.

When considering the data of certain species and grouping them into categories such as extinct, endangered, or K/r-selected we take into account factors such as:

  • Population size
  • Behavior
  • Carrying capacity
  • Reproduction rates

and so on, then classify each species accordingly.

Species that are Extinct are no longer on the earth. This classification refers to species of the past and does not include humans as of yet. The endangered category is reserved for species whose population sizes are <u>at a critical low and are near </u><u>extinction</u>, which is also not the case for humans.

The K-selected and r-selected theories consider reproduction rates and carrying capacity as well when grouping species. Species that produce few offspring at a time are often found in this group. This category also refers to species whose offspring have a high chance of survival into maturity and whose population size is near the limit of the environment. All of this follows the data given and is the classification for the human species.

To learn more visit:

brainly.com/question/13046597?referrer=searchResults

3 0
2 years ago
Researchers investigating the regulation of neurotransmitter release from presynaptic neurons proposed a model in which CDK5, a
GrogVix [38]

Answer:

"GFP contained in synaptic vesicles moved into the synaptic cleft by exocytosis."

Explanation:

Synaptic vesicles are small membrane sacs that carry neurotransmitters from the cell body where they are produced, to the presynaptic membrane of the terminal button where they are released. The release zone of the presynaptic membrane contains voltage-dependent calcium channels. When an action potential depolarizes the presynaptic plasma membrane, Ca^{2+}-channels open, and  Ca^{2+} flows into the nerve terminal to trigger the exocytosis of synaptic vesicles, thereby releasing their neurotransmitters into the synaptic cleft

3 0
2 years ago
Which of the following factors contributes to the distribution of biodiversity on Earth?
Aleksandr-060686 [28]

Answer:

Which of the following factors contributes to the distribution of biodiversity on Earth?

Inter-species interaction contribute greatly to the distribution of biodiversity on earth as it gives room for migration which helps to increase biodiversity

Explanation:

8 0
2 years ago
Read 2 more answers
X
Dovator [93]

it is D on my point of veiw..

5 0
2 years ago
What does the immune system protect the body against?
Rudik [331]
The immune system protects your child's body from outside invaders, such as bacteria, viruses, fungi, and toxins (chemicals produced by microbes). It is made up of different organs, cells, and proteins that work together.

Anatomy of the immune system

There are two main parts of the immune system:

The innate immune system, which you are born with.

The adaptive immune system, which you develop when your body is exposed to microbes or chemicals released by microbes.

These two immune systems work together.

The innate immune system

This is your child's rapid response system. It patrols your child’s body and is the first to respond when it finds an invader. The innate immune system is inherited and is active from the moment your child is born. When this system recognizes an invader, it goes into action immediately. The cells of this immune system surround and engulf the invader. The invader is killed inside the immune system cells. These cells are called phagocytes.

The acquired immune system

The acquired immune system, with help from the innate system, produces cells (antibodies) to protect your body from a specific invader. These antibodies are developed by cells called B lymphocytes after the body has been exposed to the invader. The antibodies stay in your child's body. It can take several days for antibodies to develop. But after the first exposure, the immune system will recognize the invader and defend against it. The acquired immune system changes throughout your child's life. Immunizations train your child's immune system to make antibodies to protect him or her from harmful diseases.

The cells of both parts of the immune system are made in various organs of the body, including:

Adenoids. Two glands located at the back of the nasal passage.

Bone marrow. The soft, spongy tissue found in bone cavities.

Lymph nodes. Small organs shaped like beans, which are located throughout the body and connect via the lymphatic vessels.

Lymphatic vessels. A network of channels throughout the body that carries lymphocytes to the lymphoid organs and bloodstream.

Peyer's patches. Lymphoid tissue in the small intestine.

Spleen. A fist-sized organ located in the abdominal cavity.

Thymus. Two lobes that join in front of the trachea behind the breastbone.

Tonsils. Two oval masses in the back of the throat.

How do antibiotics help fight infections?

Antibiotics can be used to help your child's immune system fight infections by bacteria. However, antibiotics don’t work for infections caused by viruses. Antibiotics were developed to kill or disable specific bacteria. That means that an antibiotic that works for a skin infection may not work to cure diarrhea caused by bacteria. Using antibiotics for viral infections or using the wrong antibiotic to treat a bacterial infection can help bacteria become resistant to the antibiotic so it won't work as well in the future. It is important that antibiotics are taken as prescribed and for the right amount of time. If antibiotics are stopped early, the bacteria may develop a resistance to the antibiotics and the infection may come back again.

Note: Most colds and acute bronchitis infections will not respond to antibiotics. You can help decrease the spread of more aggressive bacteria by not asking your child’s healthcare provider for antibiotics in these
4 0
2 years ago
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