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Mama L [17]
3 years ago
14

The mayas used……………………to build structures. A) stone B)wood

Biology
1 answer:
LenaWriter [7]3 years ago
5 0

A) Stone

They used materials they were available to them which was majorly limestone which is a type of stone.

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Jonas Salk was awarded the Nobel Prize for discovering a way to vaccinate against
Bogdan [553]

Answer:

Jonas Salk was awarded the Nobel Prize for discovering a way to vaccinate against  polio in the United States in the 1950's. This allowed millions of school-age children to  avoid crippling disease, and to swim during summer again, as polio was often spread in public swimming areas before.

The statement that best describes how the polio vaccine works is:

It triggers the immune system to produce antobodies to fight the disease-causing agent.

Explanation:

There are two main reasons for this answer. The first one is that every vaccine is aimed to introduce a controlled amount of antigenes to be accepted by the organism. These antigens are made after some studies were conducted in a lab and were obtained from substances that the human body can accept to train the immune system to develop an effective defense for the virus or bacteria on the matter. In our case, the polio vaccine works the same way and allowed to save many lives.

3 0
2 years ago
Which of the following statements about eukaryotic cells is NOT true
Anestetic [448]
What are the options?
8 0
2 years ago
Some scientists claim that humans are responsible for the increase of CO2 in the atmosphere. Evaluate which system the increased
forsale [732]

Yes, human activities are a significant cause of the increase in the amount of Carbon dioxide in the atmosphere.

<h3><u>Explanation:</u></h3>

The increasing amount of CO_2 is a big problem in today's world for the atmosphere. Human activities are playing a vital role in the rise in CO_2. Carbon emission is majorly happening because of pollution. The pollution by vehicle, wax factories, chemical factories, etc. also, some other kinds of Carbon emission activities are there like burning coal and plastic produces Carbon in very high amount and this Carbon directly mix into the atmosphere.

Due to the increase in CO_2, both natural and agricultural ecosystems are suffering. CO_2 causes air pollution, and because of that, the quality of crops is declining day by day. Also, the natural vegetation is struggling as the rainwater is also not pure; the amount of acidic content in natural rain is increasing per year. All these activities are leading towards global warming, which one day will bring our earth to an end. So it is imperative to take some severe legal measures to save the environment and decline the amount of CO_2 producing.

3 0
2 years ago
In one type of dog, black spots (B) are dominant over brown spots (b) and long tails (L) are dominant over short tails (l). Use
stiks02 [169]

Answer:

There is a 0% chance of getting the phenotype of brown spots and short tails.

Explanation:

Here is a Punnett square

             BL              Bl              BL               Bl

BL       BBLL          BBLl          BBLL          BBLL

Bl        BBLl            BBll           BBLl           BBll

bL       BbLL           BbLl          BbLL          BbLl

bl        BbLl            Bbll            BbLl          Bbll

8 0
3 years ago
Read 2 more answers
All living things must take in and use energy to perform the functions associated with life which of the following functions are
miss Akunina [59]

Answer: synthesizing of complex molecules

Explanation:

During the synthesizing of complex substances (catabolism) energy is given off to the body to generate heat within the body

3 0
2 years ago
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