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sattari [20]
2 years ago
7

A carpenter sands a wooden board until it is smooth. It this a physical change or a chemical change?

Biology
1 answer:
AleksandrR [38]2 years ago
8 0
Physical change as no new substance is created
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One way to describe a species is as a population adapted to a certain niche. That population has a small gene pool. If the membe
dedylja [7]
In determining species, it is best to differentiate in terms of the population that is being adapted in which, a certain niche. So, if it has a small gene pool, and the different species will be interbreeding each other with a much genetic variability in gene pool, it would most likely cause a less adaptation. The niche will be having a less adaptation if too much genetic variability will occur.
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3 years ago
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The perimeter of a triangle is 240 cm.The lenghts of the sides are in the ratio 3:4:5.calculate the lenghts of the longest and s
aksik [14]

Answer:

Longest : 100 , Shortest : 60

Explanation:

Step by step to answer :

Take  3+4+5 = 12

240/12 = 20

20 x 5 = 100 (Longest )
20 x 3 = 60  (Shortest )
20 x 4 = 80

100 + 60 + 80 = 240 correct

Hope it helped ! Mark me as Brainliest Ty !

5 0
1 year ago
A science class is checking to see how much life exists in local streams. The students predicted their water sample would only h
guapka [62]

Answer:

In the last step of the scientific process when they compare their results.

Explanation:

The scientific process can be described of the following steps in order:

Starting with the observation, finding a point that asks a question which will be investigated, constructing a hypothesis that can be tested, testing the hypothesis and lastly comparing the results and starting over.

The example given in the question has a question to investigate, the students have a hypothesis. They test it and find out that the water sample can hold 20 amoeba which does not match their predictions. The students will check if their results match their predictions in the last step of the process when they compare their results with their hypothesis.

I hope this answer helps.

5 0
3 years ago
What organelle can convert light energy from the sun into chemical energy that fuels the activity of the cell?
kherson [118]

Answer:

Chloroplasts

Explanation:

Chloroplasts are plant cell organelles that convert light energy into relatively stable chemical energy via the photosynthetic process.

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2 years ago
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Please help 50 points (real answers please) questions in the picture
dem82 [27]

Answer:

plasma membrane

other nonpolar molecules

Explanation:

4 0
2 years ago
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