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3 years ago

Any three ways by which harmful subtances could contaiminate bod

1 answer:

4 0

Through a cut or an injury where any skin has been broken.

An infection through an animal's bite or sting.(Like the West Nile Virus which spreads though mosquito bite, or Rabies though an infected mammal's bite).

Can be inhaled or consumed and go from the lungs into the other organs causing harm internally.

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Melissa is studying a Gram-stained slide of curd bacteria. She sees many rod-shaped, violet-colored bacteria.What type of bacter

Serhud [2]

The answer is Paramecium.

The paramecium is a unicellular ciliated protozoan. They are often found in fresh water and brackish water areas. They have the elongated shaped that looks like a rod and has the color violet under the stain because it signifies that it is positive.

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3 years ago

Scientists use DNA sequencing to understand relationships among life on Earth. The chart illustrates differences between five sp

OlgaM077 [116]

Answer:

With respect to the differences in the DNA sequence of six species, including the human one, it is true that the DNA sequences may vary but the aminoacid sequences are identical.

Explanation:

Options for this question:

<em>The DNA sequences may vary but the amino acid sequences are identical. </em>
The nitrogen bases in the nucleotides must also be different in each.
The process in producing additional DNA, replication, is identical in all six.
The process of producing DNA, or replication, varies due to the differences in the DNA codes.

The different species that exist have specific genomes for each of them, this is the <u>genetic information contained in the DNA varies from one species to another</u>, as can be seen in the scheme (see image). However, the genetic code is universal, and does not vary from one species to another.

The genetic code is found in the RNA molecule and is a sequence of nucleotides that, organized in triplets (codons), are responsible for the synthesis of specific amino acids. An RNA molecule contains the information necessary for protein synthesis.

The scheme shows the differences of five species with respect to the human, based on the respective DNA sequences. But what it does not show is a universally accepted truth, that the nucleotide sequence encoding an amino acid is the same for each of these species.

Learn more:

Genetic code brainly.com/question/15338

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3 years ago

6. How can an introduced species affect an ecosystem?

SCORPION-xisa [38]

Answer:

When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.

Explanation:

I majored in Biology

4 0

3 years ago

When hydrogen is broke down what 2 substances are created

galina1969 [7]

Answer:

Hydrogen and Oxygen

Explanation:

Looked it up for ya ?

8 0

2 years ago

Read 2 more answers

3. Nowadays many people are using sunscreen lotions as per doctor's advice to protect

evablogger [386]

Answer:

Ozone layer... pollution

Explanation:

The ozone layer is a layer in the atmosphere which provides a barrier between harmful UV rays and the Earth. However, pollution is quickly depleting the layer which in turn creates a higher risk of skin cancers and other conditions caused by harmful UV rays.

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3 years ago