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Len [333]
3 years ago
13

Which statement best represents a hypothesis?

Biology
1 answer:
MaRussiya [10]3 years ago
6 0

Answer:

The answer is C.) if mosquitoes are given a light in a dark room, they will fly toward the light.

Explanation:

Hope this helps :))

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M protein is produced by
egoroff_w [7]

Answer:

The correct answer will be option- <em>Streptococcus pyogenes.</em>

Explanation:

M protein is an important virulence factor which is produced and expressed on the surface of <em>Streptococcus pyogenes. </em>

This protein plays important role in the bacterial infection like adherence to epidermal keratinocytes, resistance to phagocytosis,  invasion of epithelial cells and microcolony formation.

The M-protein is a α-helical coiled structure protein which consists of the four distinct regions (A–D) in which  A-region in the N-terminal is highly variable.

Thus,  option- <em>Streptococcus pyogenes</em> is the correct answer.

4 0
2 years ago
A student wants to test the effect of different amounts of caffeine on the heart rate of dogs. Describe the experimental groups
RSB [31]

Answer:

Experimental groups: type of dogs

Dependent variable: hearth rate

Independent variable: the amount of caffeine  

Explanation:

The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.

3 0
3 years ago
The amount of carbon dioxide in the atmosphere would greatly increase if there were fewer _____.
jasenka [17]
B. Gases because it increase by less
4 0
3 years ago
Please answer all :)
Serggg [28]

Answer:

i) Rusting occurs the least in tubes 2 and 3 because either of air and water which are necessary for rusting is absent in the two tubes respectively.

ii) Rusting occurs most in tube 1 because both air and water which are necessary for rusting are present.

Explanation:

Rusting is a chemical change which involves a redox reaction. During the process of rusting, metallic iron is oxidized to hydrated iron (iii) oxide by oxygen present in air.

For rusting to take place effectively, each of these three factors mist be available: metallic iron, oxygen and water.

In the figure above, the iron nails in the three tester tubes will rust to different extents based on the availability of the three factors.

In test tube 1, the iron nails will rust the most because all the three factors: metallic iron, oxygen present in air, and water are abundantly present.

In test tube 2, the iron nails will rust the least or not at all because boiling of water removes dissolved oxygen from water and the oil layer above the boiled water prevents entry of oxygen from air. Thus, the nail do not rust because one of the three factors for rusting to take place, in this instance, oxygen is absent.

In test tube 3, the iron nails rusts the least or not at all as well because moisture or water is absent. Calcium chloride, a drying agent removes all the moisture from inside the tube. Hence, even though air is present, rusting do not occur as there is no moisture or water present.

7 0
3 years ago
What will happen to a population of organisms that are in an oxygen rich environment. (Double click the story board to draw on i
Dmitry_Shevchenko [17]

Answer:

it will disolve

Explanation:

6 0
2 years ago
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