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Arlecino [84]
2 years ago
9

Look below (7th grade question)

Biology
1 answer:
Marianna [84]2 years ago
4 0

Answer: I think the answer is D. metamorphism

Explanation:

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A machine called os used for both harvesting and threshing<br>​
Bess [88]

Answer:

<h2><u>combine harvester</u></h2>

Explanation:

hope this helps you!!

4 0
2 years ago
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If I dont get an answer for this ima be highly upset​
Free_Kalibri [48]

Answer:

Cold water can hold more dissolved oxygen than warm water. In winter and early spring, when the water temperature is low, the dissolved oxygen concentration is high. In summer and fall, when the water temperature is high, the dissolved-oxygen concentration is often lower.

Explanation:

4 0
2 years ago
Jason adds the antibiotic penicillin to a bacterial culture. The bacteria develop genetic modifications in their genome, which g
Aleks [24]
The correct answer is A.
The use of antibacterial drugs can cause modifications in the genetic material of the concerned bacteria. If the genetic material of the bacteria are modify, that means they have undergone mutation. Because the base sequence of the normal and that of the mutated gene is different, antibiotic will not be able to recognize the bacteria again and thus will not be able to attack it. 
3 0
3 years ago
A client with suspected human immunodeficiency virus (HIV) has had two positive enzyme-linked immunosorbent assay (ELISA) tests.
victus00 [196]

Answer:

Western blot should be performed

Explanation:

Generally ELISA test is sensitive to elevated antibodies levels in the blood. Because HIV infection is characterise with increases in antibodies levels(HIV-antibodies levels)of the body, it is usually the first screening test for HIV,however it  is also sensitive to elevated antibody   from  any other infection apart from HIV. Therefore for confirmation, the procedure is to run a second ELISA test, to determine if the antibody rise was due to HIV or not. If the second test turns positive, then Western blot can be applied.

The Western blot through  secondary and primary antibodies binding , separates the  investigating antibodies, and  identity the specif HIV antibodies present  to give a positive HIV-antibody,  confirming ELISA positive test.

Thus for confirmation of HIV specific antibodies  of the blood; ELISA test followed by Western blot is  ideal

6 0
3 years ago
In a well-balanced ecosystem, squirrels eat nuts, raccoons feed on squirrels, and bears feed on raccoons. It was observed that t
BlackZzzverrR [31]
Trophic levels go by, 
Producer (The nuts)
Primary Consumer (Squirrels)
Secondary Consumer (Raccoons)
Tertiary Consumer (Bear)


So squirrels would be at a lower trophic level.
 Hope his help :)

7 0
3 years ago
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