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Alla [95]
3 years ago
11

Susan needs to measure and heat the chemical she wants to use in an experiment with a graduated cylinder.

Biology
1 answer:
alexandr402 [8]3 years ago
8 0
B. Glass cylinder


Because the plastic might melt in high temperatures and the metal doesn’t allow visibility and measurements to the chemicals.
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happens slowly over time only occurs below the species level is any change in the DNA of an organism can be caused by genetic dr
LUCKY_DIMON [66]

Answer:

The correct answer is - microevolution.

Explanation:

Microevolution is the very small evolutionary change specially allele frequencies on the level of species that occurs slowly over period of time. These changes occurs on the level of DNA or genetic level.

These evolution can be caused by the natural selection process or genetic drift over the generation of the species or population over period of the time. It is the study of the evolution that occurred on level of separated gene pool.

Thus, the correct answer is- microevolution.

5 0
3 years ago
A(n) ____________ is a preparation of one or more microbial antigens to induce protective immunity in potential hosts. listen to
Dmitry [639]

A vaccine is a preparation of one or more microbial antigens to induce protective immunity in potential hosts.

Vaccines are the anti-microbial agents administered to provide immunity against specific diseases. There can be a wide variety of vaccines, like: live attenuated vaccine, vaccine with killed or inactivated microbes, vaccine containing the sub-parts of the microbes, etc.

Immunity is the body's ability fight against a disease. The immunity is build when a body gets attacked by pathogen. Various immune cells like neutrophils, MHCs, dendritic cells, B and T cells, etc. are involved in building and strengthening the immunity of any person.

To know more about vaccines, here

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7 0
1 year ago
Which statements about electromagnetic waves are true?
adell [148]

Answer:

I would say they have moving electric and magnetic fields.

Explanation:

8 0
3 years ago
Read 2 more answers
What is the mass of all the worker bees in the hive together? Write your answer in scientific notation.
Lisa [10]

Answer:

4 × 10^0 kg or 4×E0 kg.

Explanation:

Before delving into or solving the Calculation, let us check one or two things about worker bees.

WHAT IS A WORKER BEE?.

Bees generally are social insects living in an organized community and they consist of three castes which include; the drone bees, worker bees, and the queen bees.

The queen bees are the female bees while the drone bees are the male bees.

The WORKER BEES are female bees too, but the only difference between them and the queen bees is that they (worker bees) do not reproduce like the queen bees. They are saddled with the responsibility of looking for food and maintaining the hive temperature.

Now to the question, the mass of a bee= 1 × 10^-4 kg. And there are 4 × 10^4 bees in hive. Therefore, the mass of all the worker bees in the hive together = (1 × 10^-4) × (4×10^4).

==> 4 × 10^0 kg, or 4E0 kg.

8 0
3 years ago
How is a new species or group of species represented in the scientist's model?
klemol [59]
It allows them to study and analyze the species.
3 0
3 years ago
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