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lbvjy [14]
3 years ago
7

What substances must pass through a cells membrane for the cell to continue to function?

Biology
1 answer:
Lesechka [4]3 years ago
5 0
Water, oxygen, C02, and glucose in its original state.
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How do scientists use weather to keep people safe
Natalija [7]

By predicting bad weather and keeping people safe during danger

Btw, i think you meant meteorologists.

6 0
3 years ago
Green algae are more closely related to plants than they are to kelp.Why is this so?
In-s [12.5K]

Answer: Green Algae are closely related to plants.

Explanation: Green Algae are closely related to plants because of they possess photosynthetic pigments as plants.

Green algae and plants are closely related in that they can manufacture their own food from nutrients and sunlight through the process of photosynthesis

Green algae also possess the same carotenoids and chlorophyll a and b as land plants which make them closely related.

Kelps don't have these characteristics.

6 0
3 years ago
Jane Goodall did some things that would probably not be done today in a scientific study. What were some things?
sertanlavr [38]

Answer:

Answer is D, all of the above

8 0
3 years ago
An element has a half-life of 30 years. If 20 mg of this element decays over a period of 90 years, how many mg of this element w
Vlada [557]

Answer:

2.5 mg

Explanation:

<em>The half-life of a substance is the time required for one half of the substance to decay. In order words, it is the time it will take for a substance to decay into  half of its initial size.</em>

For a 20 mg element with a half-life of 30 which decays over a period of 90 years;

The first 30 years, 10 mg would have decayed, remaining 10 mg

The second 30 years, the remaining 10 mg would have decayed to 5 mg

The third 30 years, 5mg would have decayed to 2.5 mg.

Hence, in 90 years, 20 mg of the element would <u>remain only 2.5 mg.</u>

7 0
2 years ago
What is the name of groups who frequently travel to gather food and hunt animals?
sergejj [24]
I am not really sure but i think it is hunter-gatherer.
8 0
3 years ago
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