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malfutka [58]
3 years ago
5

Marine debris is best described as being composed of _______. a. solid garbage b. untreated sewage c. toxic chemicals d. things

discarded by humans
Biology
2 answers:
777dan777 [17]3 years ago
8 0

The right option is; d. things discarded by humans

Marine debris is best described as things discarded by humans.

Marine debris is any human made, solid substances that has be intentionally or unintentionally released in a lake, stream, sea, ocean, or waterway. Marine debris may be composed of simple items such as a plastic bag, bottles, glass or cans that enter the water body potentially injuring and killing marine life. Almost all marine debris comes from land-based sources.


Andreyy893 years ago
4 0
The answer would be d. things discarded by humans
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Name the 6 roles of proteins in the body.
Sphinxa [80]

Answer: 1. Repair and Maintenance

Protein is termed the building block of the body. It is called this because protein is vital in the maintenance of body tissue, including development and repair. Hair, skin, eyes, muscles and organs are all made from protein.

2. Energy

Protein is a major source of energy. If you consume more protein than you need for body tissue maintenance and other necessary functions, your body will use it for energy. If it is not needed due to sufficient intake of other energy sources such as carbohydrates, the protein will be used to create fat and becomes part of fat cells.

3. Hormones

Protein is involved in the creation of some hormones. These substances help control body functions that involve the interaction of several organs. Insulin, a small protein, is an example of a hormone that regulates blood sugar. It involves the interaction of organs such as the pancreas and the liver. Secretin, is another example of a protein hormone. This substance assists in the digestive process by stimulating the pancreas and the intestine to create necessary digestive juices.

4. Enzymes

Enzymes are proteins that increase the rate of chemical reactions in the body. In fact, most of the necessary chemical reactions in the body would not efficiently proceed without enzymes. For example, one type of enzyme functions as an aid in digesting large protein, carbohydrate and fat molecules into smaller molecules, while another assists in the creation of DNA.

5. Transportation and Storage of Molecules

Protein is a major element in transportation of certain molecules. For example, hemoglobin is a protein that transports oxygen throughout the body. Protein is also sometimes used to store certain molecules. Ferritin is an example of a protein that combines with iron for storage in the liver.

6. Antibodies

Protein forms antibodies that help prevent infection, illness and disease. These proteins identify and assist in destroying antigens such as bacteria and viruses. They often work in conjunction with the other immune system cells. For example, these antibodies identify and then surround antigens in order to keep them contained until they can be destroyed by white blood cells.

Explanation:

8 0
2 years ago
The bacteria have an initial concentration of 1000 cells/cm3 . Each cell divides once every 30 minutes. Calculate how long it wi
Levart [38]

It will take <u>120 minutes</u> for the concentration to become > 15000 cells/cm³

<u>Given data:</u>

Initial concentration ( density ) = 1000 cells / cm³

Target/final concentration = > 15,000 cells /cm³

<h3 /><h3>Calculating the concentration every 30 minutes </h3><h3 />

<em>note</em><em> : Given that each cell divides every 30 minutes </em>

  • <u>After the first 30 minutes </u>

Concentration = 2000 cells / cm³

  • <u>After 60 minutes </u>

concentration = 4000 cells / cm³

  • <u>After 90 minutes </u>

concentration = 8000 cells / cm³

  • <u>After 120 minutes </u>

concentration = 16000 cells / cm³

Therefore after 120 minutes the concentration of the cells will be greater than 15000 cells/cm³ ( i.e. 16000 cells/cm³ )

Learn more about concentration : brainly.com/question/17206790

4 0
2 years ago
Protein catabolism is increased in conditions such as?
zaharov [31]

Answer:

Starvation

Explanation:

Hormones like Insulin, which are anabolic are low during starvation. While Glucagon and epinephrine are high which promote catabolism.

8 0
2 years ago
Chemicals produced by bacteria that limit the growth of other bacteria are called:
Andrews [41]
Chemicals produced by bacteria that limit the growth of other bacteria are called antibiotics.
8 0
3 years ago
How many nucleotides <br> are in the gene acc tta ggc cct tca
noname [10]
15

Each one of those letters represents a nucleotide. So to find out how many nucleotides are in the gene, just count them

However, keep in mind that this only represents 1/2 strands that make up DNA. If you are supposed to include the other strand, simply double 15, and there would be 30 nucleotides total. However, only 1 strand is actually required in order for protein synthesis to work, so I think it's just 15.
5 0
3 years ago
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