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Brums [2.3K]
2 years ago
11

2. Who was the first to clearly define the idea of a species? Abeka Science 7th G

Biology
1 answer:
Lyrx [107]2 years ago
8 0

The most famous definition of a species comes from the 20th century German-born biologist Ernst Mayr, who emphasised the importance of interbreeding.

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A(n) _________ scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray.
olya-2409 [2.1K]

Answer;

-PET scan

A PET scan uses radioactive markers in the blood to monitor blood flow and metabolic activity via x-ray

Explanation;

-A positron emission tomography (PET) scan is an imaging test that helps reveal how the tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

-A PET scan is used to diagnose certain health conditions, to plan treatment, to find out how an existing condition is developing, and to see how effective a treatment is.

-In a PET scan, a machine detects radiation that is emitted by a radiotracer. A radiotracer consists of radioactive material that is tagged to a natural chemical, such as glucose.

7 0
3 years ago
Read 2 more answers
Define "animal cell" in about 1 sentence.
IgorLugansk [536]
A cell which contains cytoplasm, cell membrane and a nucleus
7 0
3 years ago
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Why use needle loop to prepare fungi slide? Please, help me
yulyashka [42]

Answer:

The needle loop is use to transfer fungi to a soft agar and this will cause or create more fungal growth to occur in the slide.

Explanation:

Needle loop is a tool or device use in microbiology to inoculate microorganisms like bacteria and fungi in media to boost their growth. It is use for sampling and transferring specimens or microorganisms into a media for further analysis, examination and serial dilution.

3 0
3 years ago
Which is not a way that the increased global temperature will change conditions on Earth?
NemiM [27]

Answer;

I think it's d,possible spread of tropical diseases.

8 0
2 years ago
A plant scientist was hired by a greenhouse operator to devise a way to force iris plants to bloom in the short days of winter.
Ksju [112]

Answer:

Interrupt the long winter nights with a brief period of light.

Explanation:

Long day plants, also called short night plants, flower when the dark period is equal or less than the critical period specific for the species. These plants normally flower in summers when nights are short and days are longer. Winters have a long dark period and do not support flowering in shirt night plants.

A continuous dark period is critical for flowering. A short night plant can flower in winters (having longer dark periods) if the dark period is interrupted by exposing the plant with a flash of light. To make short night plants, such as iris to flower in winters, the plant should be given short period of light after completion of critical dark period.

3 0
3 years ago
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