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masha68 [24]
3 years ago
9

A population of a tree snail species has different patterns in their shells. These slight

Biology
1 answer:
Alja [10]3 years ago
5 0

Variations can be genetic or environmental, the traits are passed from one generation to other generation of snail is from from both parents to offspring and through the environment.

The correct answer is C.

Explanation:

Genetic variation in an organism is passed to the offspring by its parents.

environmental variation is the the result of different environment with which individual adapt.

Natural selection is a process in which a suitable trait which is well adapted to the environment is passed on tho future generations.

Genetic variation is the change in DNA or gene of the individual trait. The tree snails having different pattern in their shells is due to the habitat they are living in.

The snails which have well adapted to the environment are able to reproduce and pass on the traits to their progeny. The variation is due to the traits passed from parents through the environment also.

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The sides of the DNA ladder are made of two molecules that alternate. The alternating molecules are __?__ and __?__.
Rudik [331]

Answer:

Sugar and phosphate

Explanation:

sugar and p h o s p h a t e

3 0
2 years ago
If anyone is willing to help me, I will greatly appreciate it. I can’t afford to fail… I need to graduate so I can achieve my go
Valentin [98]

Answer:

1) you're going to have to flip the coins (or fake numbers) for the experimental trials.

2) for the theoretical, there is 1/2 chance for heads or tails with each toss, so you'd expect that out of 10 tosses, 5 heads, 5 tails. out of 100 tosses- 50 heads, 50 tails.

When tossing 2 coins- 1/2×1/2 = 1/4 (25%) chance that 2 heads, 2 tails, or 1 heads & 1 tails. Deviation value comes from after you done your flipping and recorded your data. So if on 100 flips you actually got 50 and 50 (rarely us that exact ;), the deviation from the expected of 50/50 would be 0.00. If however you flipped 100 heads or 100 tails (impossible), then the deviation value would be 1.00.

|(100-50)| ÷ 50 = 50÷50 = 1.00

So usually you may have data like: 47/53 or something a little off than 50/50, making deviation |(47-50)| ÷ 50 = 3÷50 = 0.06.

Now the number of flips is important for the outcome! So if a coin toss if 10 times had 4 heads, 6 tails, the deviation value would be:

|(4-5)| ÷ 5 = 1÷5 = 0.20

So increasing the # flips DECREASES the deviation value!!

Whether it's from 10 to 100, or from 100 to 200. Look at my example of how the 10-flip deviation of 0.20 decreased to 0.06 with 100-flip

5 0
2 years ago
Read 2 more answers
Alexis knows that different forms of water can affect erosion differently. She wants to build a model to compare different forms
Natasha_Volkova [10]

Answer:

1. Obtain two identical containers and dry sand.

2. Shape equal amounts of sand into a  "slope on the side of"  each container.

3. Spray water on the sand in one container. The sprayed water represents "rainfall" .

4. In the other container,  "place ice cubes to melt on the sand. This represents snow or glaciers." .

5. Observe and record the changes in the sand.

6. Analyze differences between the two containers.

Explanation:

Mine hasn't been graded yet but I'm pretty sure this is the right answer. I'll come back once it's graded and say.

8 0
3 years ago
According to the model, what is the role of RNA in DNA replication? A) RNA has no role in DNA replication B) RNA acts as a prime
rjkz [21]
The answer is B. Primase produces RNA, making it a type of RNA polymerase. RNA is complimentary to a single strand of DNA.
8 0
3 years ago
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Which of the following choices are stars that are in the last stage of their life cycle?
zmey [24]

Answer:

D: Black hole

Explanation:

The formation and life cycle of stars

A nebula. A star forms from massive clouds of dust and gas in space, also known as a nebula. ...

Protostar. As the mass falls together it gets hot. ...

Main sequence star. ...

Red giant star. ...

White dwarf. ...

Supernova. ...

A neutron star or black hole.

5 0
2 years ago
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