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madam [21]
2 years ago
10

HELP

Biology
1 answer:
Novosadov [1.4K]2 years ago
7 0

Answer:

It allows passage of particles into and out of the cell

Explanation:

Cell membrane has proteins that help particles go in out of the cell. This type of passive transport is called facilitated diffusion.

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How do humans obtain the nitrogen they use in their bodies
olya-2409 [2.1K]
<span>Most organisms, including humans, can't use the free gaseous form of nitrogen found in the air. We need other organisms and natural processes to "fix" nitrogen into a solid form that plants and animals can use. Most of the nitrogen that plants and animals use is made by bacteria.</span>
3 0
3 years ago
Read 2 more answers
State the major processes of the urinary system and describe the activity of each process.
Dennis_Churaev [7]

Answer:

The urinary system removes excess substances and waste products from the metabolism from the body through the urine, contributing to the maintenance of homeostasis, the chemical composition of the internal environment. Urine is produced in the kidneys, passes through the ureters to the bladder, where it is stored and is released into the exterior through the urethra.

The kidneys perform the main work of the urinary system comparing with the other parts of the system, acting primarily as passageways and storage areas. With the filtration of blood and the formation of urine, the kidneys contribute to homeostasis of body fluids in a number of ways, such as: Regulation of the ionic composition of blood; Maintenance of blood osmolarity; Regulation of blood volume; Blood pressure regulation; PH regulation of blood; Hormone release; Regulation of blood glucose level; Waste excretion and toxic substances.

Ureters - They are two tubes that carry urine from the kidneys to the bladder. The ureters are capable of performing rhythmic contractions called peristalsis. Urine moves along the ureters in response to gravity and peristalsis.

Bladder - The urinary bladder acts as a temporary reservoir for urine storage. It is a hollow, elastic muscular organ that in men is directly anterior to the rectum and in women, is located in front of the vagina and below the uterus.

Urethra - is a tube that conducts urine from the bladder to the outside, being lined with mucosa that contains a large amount of mucus-secreting glands. The urethra opens outwards through the outer ostium of the urethra.

8 0
3 years ago
You will come to find that everything that makes life possible on earth is all _____.
Georgia [21]
The answer is interconnected. You will come to find that everything that makes life possible on earth is all interconnected. It is just like the way all the human activities and necessities for the everyday life are all interconnected to nature.
5 0
3 years ago
Q1. (1 point) A genetic engineer wants to isolate a gene from a scorpion that encodes the deadly toxin found in its stinger, wit
tatuchka [14]

Answer:

cDNA library.

Explanation:

Genomic library may be defined as the collection of all the genomic DNA of an individual. The genomic library is constructed by the digestion of digestion of DNA fragments and there further transfer in the vectors.

cDNA library is prepared in case of eukaryotes because the complementary DNA is produced from the RNA. The eukaryotes DNA is interrupted with exons. In case of spider, the cDNA linrary is prepared because its DNA is interrupted with exons.

Thus, the answer is cDNA library.

8 0
3 years ago
Temperatures on earth remain within a suitable range for life because of the
Tamiku [17]
Two main factors :
First, the distance from the earth to the sun allows enough heat (energy), not too much, to be absorbed on earth's surface.
Second, earth's atmosphere allows it to keep most of the heat it absorbed during the day for the night. Otherwise, temperatures would drop down below a life sustaining point.
5 0
3 years ago
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