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OlgaM077 [116]
2 years ago
12

In at least five (5) sentences summarize how humans are changing the carbon cycle?

Biology
1 answer:
Serga [27]2 years ago
5 0

Answer:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. This extra carbon dioxide is lowering the ocean's pH, through a process called ocean acidification.

Explanation:

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Plants have an intermediate body form called a sporophyte that undergos meiosis. the cells produced grow, through mitosis, into
Nana76 [90]

The answer is alternation of generation. It occurs in those plants and algae in the Archaeplastida and the Heterokontophyta that have distinct sexual haploid and asexual diploid stages. The relationship between the sporophyte and gametophyte varies among different groups of plants. In those algae which have alternation of generations, the sporophyte and gametophyte are separate independent organisms, which may or may not have a similar appearance. In liverworts, mosses, and hornworts, the sporophyte is less well developed than the gametophyte and is largely dependent on it. In all modern vascular plants the gametophyte is less well developed than the sporophyte.






4 0
3 years ago
Which of the following describes a positron emission tomography (PET) scanner? 1: A device that uses magnetic fields to produce
Delvig [45]

Answer:

3: A device that uses radioactive fluid to determine the active areas of the brain

Explanation:

A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.

7 0
3 years ago
Describe one of the three types of volcanoes we discussed today
White raven [17]

Answer: Shield, Cinder Cone, and Composite volcano.

Explanation: A shield volcano is a volcano that is formed with lava is very runny and spreads to a wide area and then cools to form a shield volcano. These are common at Hawaii.

A cinder cone volcano is the smallest volcano. It's made from minor eruptions and cinders. They're short and usually erupt for a short period of time. Mexico's Parícutin volcano, is a cinder cone.

Composite or stratovolcanoes are the most common type of volcano. They form from thick, less runny lava. Since it is so thick, it cools then makes the volcano taller. Mount st helens, in Washington state is a stratovolcano.

3 0
2 years ago
Because there are three different possible reading frames in a messenger RNA (mRNA) molecule, most mRNAs can be translated in a
Dmitry [639]

Answer:

False

Explanation:

In the genetic code, each triplet of nucleotides (i.e., each codon) determines one specific amino acid or one-stop codon. The genetic code is not overlapping, which means that the same letter in the genetic code (nucleotide) cannot be used for two different codons. There are 64 possible combinations of triplets of nucleotides, 61 of them determine amino acids, while three triplets determine stop codons (UAG, UAA, and UGA) that indicate the termination of translation. Moreover, the genetic code is also degenerate, which means that one amino acid can be coded by more than one codon.

7 0
2 years ago
Which of the following are matched correctly?
kogti [31]

Answer:

<u>1. type IV hypersensitivity: delayed-type hypersensitivity.  </u>

<u>2. type I hypersensitivity: IgE  </u>

<u>3. type II hypersensitivity: IgG  </u>

<u>4. type III hypersensitivity: immune complexes </u>

Explanation:

Type IV hypersensitivity is cell mediated hypersensitivity rather than antibodies as in all other types of hypersensitivities. It is also known as delayed type hypersensitivity because it usually respond in 2-3 days via T-Lymphocytes rather than antibodies like IgE or IgG. So we can say that in option 5 is mismatched as it relates type IV to IgG antibodies.

4 0
3 years ago
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