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4vir4ik [10]
3 years ago
13

Fill a small bowl with 1-2 inches of water. Take a sewing needle and place it on a tissue paper. Place the tissue paper with the

needle on the water in the flat dish. Let the tissue sink to the bottom of the bowl and record your observations of the needle.
Biology
1 answer:
kobusy [5.1K]3 years ago
5 0

The sewing needle should float in the water if placed on a horizontal angle if I remember properly.

I hope this helps in some way.

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Functions of cell wall​
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it protects the plant cell it give the shape to cell

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Which is not a major similarity or difference between freshwater and marine ecosystems?
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<span>The correct answer is b. ocean and freshwater system conditions generally remain constant throughout the year. This is not true because they are very different. For examples, freshwater rivers can completely freeze during the winter while oceans can't freeze completely, not even a bit. Also, the animals inside have completely different body structures to fight these changes.</span>
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Predict whether antelope and squirrels or squirrels and rabbits will have more similar DNA
Alexandra [31]

Short explanation:

It is true that all animals including humans share a common ancestor, so we're all related in a way. Turns out, some species are more similar to other since they shared a longer "common-evolutive path".

Comparison:

If we compare antelope and squirrels, we might see they don't have much in common. Antelopes are bigger, have a different diet, have a differnt habitat, have a different colour, have horns, etc. And all that also applies to squirrels.

If we compare rabbits and squirrels, we can see that the have a similar size, similar diet, alike teeth, a similar habitat in some occasions, etc.

Answer:

The most logical prediction would be that rabbits and squirrels have more similar DNA than antelope and squirrels.

Hope it helped,

BioTeacher101

5 0
2 years ago
Each chromosome usually contains:
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The second one

One gene for a particular trait
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Do Different cell types also have special duties, like building skin or bone, pumping out hormones, or making anti-bodies.
Schach [20]

Answer:

Yes, different cell types also have special duties, like building skin or bone, pumping out hormones, or making anti-bodies.

Explanation:

Cell is the basis structural and functional unit of a living organism. The body of a human is composed of trillions of cells that are organized in around 200 types of cells.

<u>A tissue is simply a group of specific kind of cell that have  a specific role.</u>

  • For example: The nervous system contains cells called neurons that have ability to transmit message from one place to another and allow us to respond to any environmental stimuli, such as heat, cold, danger etc.
  • Skin cell is composed of cells that have a role in protecting the body against the attack of harmful microbes. They also protect have role in building new skin cells and adding the protection to our body.
  • Blood cells have a role in providing us immunity (for example white blood cells) therefore, make us better able to protect ourselves from danger of diseases.
  • Muscle cells help us in moving our organs as well as allowing the whole movement from one place to another.

Thus we see that different types of cells have special functions and all these different cells coordinate with each other to make an organized and functioning body of a living organism.


Hope it help!

7 0
3 years ago
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