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nadya68 [22]
3 years ago
11

Plants could not live if they were unable to get water and nutrients from soil. In some places, especially deserts, these resour

ce are in short supply so plants must compete with each other for them. Which of the following is an actual strategy used by plants to keep competitors from being a problem?
A) Having very spiky parts above ground

B) Releasing ‘plant poisons’ (herbicides) from their roots into the soil
Biology
2 answers:
galben [10]3 years ago
7 0
This would be A, herbicides is a chemical used by humans not plants!
Sati [7]3 years ago
3 0

Answer:

A is your answer.

Explanation:

Hope this helps!

Please mark me brainliest!!!

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How does the size of a pure substance affect its density?
tresset_1 [31]

Answer:

Mass of a pure substance is directly proportional to it's density.

Explanation:

When the size of a pure substance increases, it's density increases too. And when the size of the substance decreases, the density decreases too.

8 0
3 years ago
Explain which student most likely lives in a highly developed country. Describe how one of the four categories of ecological foo
stira [4]
<h2> Ecological Footprint</h2>

The ecological footprint is an indicator that accounts for human demand on global biological resources. If a person observed his ecological footprint, there will be less environmental problems like carbon emissions, lack of fresh air, global warming and increased environmental pollution would be reduced.

<h3>Impact of ecological footprint</h3>

One of the four categories of ecological footprint can serve as an environmental indicator because the category causes impact on the environment which leads to change in the environment so we can conclude that the category of ecological footprint can serve as an environmental indicator.

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7 0
2 years ago
Which of the following is true about natural selection? ​
Anna007 [38]

The options for this question are:

- Requires genetic variation

- Results in descent with modification

- Involves differential reproductive success

- All of the above

Answer:

<u><em>The correct option is d) All of the above</em></u>

Explanation:

The theory of natural selection explains that genetic variations occur in organisms of a species. Those organisms which are better adapted to live in an environment are able to survive and pass on their characteristics to their offsprings, hence descent with modification. Through this phenomenon, evolution takes place with the passage of time. Natural selection favours survival of the fittest. Hence, all of the above statements are true.

3 0
3 years ago
The primary reason that osteoporosis accelerates after menopause in women is: * 2 points A. Increased osteoblast activity. B. Re
Nutka1998 [239]

Answer:

The correct answer is D. Reduced levels of circulating estrogens.

Explanation:

Estrogens prevent the loss of calcium and ensure its proper mineralization, thus preventing the bones from becoming brittle, maintaining the consistency of the skeleton and preventing osteoporosis. Osteoporosis is a skeletal disease in which there is a decrease in bone mass density. Thus, the bones become more porous, the number and size of the cavities or cells that exist inside them increases, they are more fragile, they resist shocks worse and they break more easily. Menopause is the definitive cessation of ovarian function that, externally, results in the disappearance of the menses and usually occurs around 50 years (the interval goes from 45 to 55 years). It is the gradual loss of calcium in the bones, which accelerates in the first years of menopause due to estrogen deficiency. At the beginning of the disease, there are no symptoms and, as it progresses, there is a tendency to suffer fractures, which leads to a decrease in height.

7 0
3 years ago
Rajesh designed an experiment to test the effect of fertilizer on plant growth. The table on the right shows the data he collect
Hoochie [10]

Answer:

the answer will be

measure the growth of plant that did not recieve fertilizer

perform additional trials

Explanation:

i just took the test and got the answer right

5 0
3 years ago
Read 2 more answers
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