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serg [7]
3 years ago
9

Identify 4 abiotic and 4 biotic fators 

Biology
2 answers:
lilavasa [31]3 years ago
7 0

Biotic:

Plants

Animals

Fungus

Abiotic:

Water

Air

Soil

Sunlight

drek231 [11]3 years ago
5 0
Abiotic- Water, Soil,Sun,Air
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Viral hemagglutination assays only work with certain types of viruses because
nignag [31]

Answer:

a. the virus must be able to cross-link red blood cells directly.

Explanation:

Viral hemagglutination assay is a method which is used for the quantification of the relative concentration of the viruses.

The principle on which the hemagglutination assay works is as follows:

  1. There are sialic acid receptors present on the surface of the red blood cells which will bind to the haemagglutinin glycoprotein present  on the surface of the viral particle. 
  2. Due to the binding of the sialic acid receptors with haemagglutinin particle there will be cross-linking of the red blood cells by the viral particles and a lattice formation will take place. 
  3. The lattice will remain suspended in the solution however if the concentration of the virus particles will be less, the lattice will settle down in the well. 

Thus, this method allows knowing the relative concentration of the virus. 

<em>Due to its basic principle of cross-linking this method works well for only a few viruses such as influenza virus. </em>

5 0
3 years ago
How are learned behaviors related to natural selection?
vlabodo [156]
D. Learned behaviors do not directly affect natural selection because they are not inherited.
This is true because learned behaviors can be taught to the offspring but do not come within them the way instincts do.
7 0
3 years ago
Segments of transferred from parent to offspring are called genes.
Mademuasel [1]
The answer would be DNA
8 0
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Which characteristic differentiates amphibians from reptiles?
Stells [14]

Option D – amphibians may use their skin for gas exchange is the characteristic feature of amphibians that differs from reptiles.

Explanation:

The amphibian skin is moist, thin and marbled and supplied by blood vessels running on its surface. The moisture present in the skin dissolves the oxygen present in its surrounding which is absorbed by the blood vessels. Special glands help the amphibians to keep the skin moist.

The very thick and tough scales present on the reptiles prevent them to absorb oxygen through their skin. Hence, they breathe and respire through their lungs.

Amphibians have three-chambered heart. They do not develop amniotic eggs. Adult amphibians although spend much time on land, they breed only in water due to the absence of amniotic sac .

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Which graph is an exponential growth model?<br> A.<br> B.<br> C.
finlep [7]
C: from what I can see in the graph
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