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Lyrx [107]
3 years ago
13

Quick PLEASE will mark brainliest

Biology
2 answers:
yKpoI14uk [10]3 years ago
8 0

Answer:The first one

Explanation:Parasites increase in the host's body because they need to reproduce, causing the number of parasites to increase

Musya8 [376]3 years ago
3 0

The first one is correct because hosts are usually bigger than the parasite, allowing multiple parasites to thrive in or on a single host, like many ticks on one dog or many cat fleas on one cat, the ticks and fleas being the parasites and the dog and cat being the hosts.

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You add the following components (in the correct volumes and concentrations) to a tube to perform a PCR reaction Buffer Magnesiu
uranmaximum [27]

Answer:

b. False

Explanation:

These components are not sufficient to successfully perform a PCR reaction. Deoxynucleoside triphosphates (dATP, dGTP, dCTP, dTTP) are missing so that the PCR reaction can occur perfectly.

The PCR technique allows a specific fragment of the DNA molecule to be amplified thousands of times in just a few hours. This technique revolutionized research in molecular biology because it had taken a long time for DNA amplification. From PCR it is possible to obtain enough copies of a part of DNA to detect and analyze the sequence that is the target of the study.

For a PCR reaction to be performed a solution with some components must be prepared. These components are:

  • Magnesium chloride buffer (to optimize reaction and act as a cofactor for polymerase)
  • Forward and reverse primers (to customize the start of the enzyme reaction)
  • DNA polymerase (Enzyme required for replication of desired DNA region.)
  • DNA Template (the DNA to be copied)
  • PCR-grade water
  • Deoxynucleoside triphosphates: dATP, dGTP, dCTP, dTTP (act as bricks in the construction of DNA molecules).
3 0
3 years ago
What do plant cells have for making food that animal cells do not
den301095 [7]

Answer:

Chloroplasts...

Explanation:

They contain a green pigment called chlorophyll that captures sun-light turning light energy into chemical energy (photosynthesis).. in the form of food utilised by the plant...

On the contrary... animals are heterotrophs and they move to capture they food

7 0
3 years ago
Read 2 more answers
9. WHY IS THIS (ANSWER TO #8. FROM ABOVE) MOLECULE SO IMPORTANT?
lana66690 [7]

Biological structures like DNA, proteins and cells all depend on molecules. ... Neurotransmitters like epinephrine are pretty simple molecules, but without them our nervous system couldn't work. Oxygen, containing just two oxygen atoms, is a very simple molecule, and it is certainly essential to living things.

3 0
2 years ago
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Temperate deciduous trees lose their leaves in Fall. Explain why trees in temperate rainforest and tropical rainforest don’t los
oksano4ka [1.4K]

Answer: Many are DECIDUOUS TREES that lose their leaves in fall, but the broad-leaved trees of a tropical rain forest are evergreen. The mass of leaves of adjacent trees form a CANOPY.

Explanation: I hope this helps, I am stuck on the same question too.

7 0
3 years ago
Which system's main purpose is to allow organisms to create more<br> organisms? *
aksik [14]

Answer:

Reproduction

Explanation:

Reproduction is the process which allows organisms to create more organisms.

hope it helps!

4 0
3 years ago
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