BIOLOGY MIDDLE SCHOOL

Which is a characteristic of an open system?A. it is sealed off from the environment
B. nothing can enter and leave
C. materials can enter and leave
D. they are all extremely hot due to pressure

Answers

Answer 1
Answer: they are all extremely hot due to pressure
Answer 2
Answer: The correct answer is D.)They are all extremely hot due to pressure.

My reason being is because with out anything leaving or entering there is a lot of build up so this means that it is very hot in what ever room it is , plus lots of pressure .

I really hope that this helps you out a lot.

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What is the kingdom and phylum of a euglena protest?

Answers

protista. Euglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their own food by photosynthesis. They are not completely autotrophic though, euglena can also absorb food from their environment; euglena usually live in quiet ponds or puddles.


. protista. freshwater single-celled organisms

how does tourism and over hunting affect the populations of the Australian Freshwater Crocodile (Crocodylus Johnstoni) ???

Answers

Tourism can affect the swamp water, if traveled on a boat, with all the oil and stuff that is needed to get the boat running, and over hunting, can slowly kill all the crocodiles that live there affecting the crocodile population! 

Which of the following best describes the shape of a DNA molecule?O
A. Like a twisted ladder
B. Like a long ribbon
O
C Like a pearl necklace
D. Like a ball of rubber bands
SUBMI

Answers

Answer:

A

Explanation:

You can see in the image I attached that it does resemble the shape of a twisted ladder.

Final answer:

The shape of a DNA molecule resembles a twisted ladder, a shape specifically termed a double helix. The two sides of the 'backbone' of the DNA are made of alternating sugar and phosphate molecules, while the 'rungs' are formed by pairs of nitrogen bases.

Explanation:

The shape of a DNA molecule is best described as 'like a twisted ladder'. This specific shape is called a double helix. The two sides of the ladder are made of alternating sugar and phosphate molecules, which form the 'backbone' of the DNA. The rungs of the DNA ladder are formed by pairs of four types of nitrogen bases. These bases pair in a specific way: Adenine (A) with Thymine (T), and Cytosine (C) with Guanine (G). The 'twisting' of the ladder is a key feature of the double helix structure, and this allows the large molecule to fit inside the tiny nucleus of a cell.

Learn more about DNA structure here:

brainly.com/question/29634357

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If a rock has equal amounts of lead and uranium in it how old is the rock?

Answers

The answer is:

45 byo

How does the prairie compare to a rainforest biome? A, It is hotter in prairies than the rainforest. B, There are not as many animals in the rainforest in comparison to prairies. C, There is more plant population in the rainforest. D, Prairies receive less rainfall than the rainforest. 10 pts

Answers

C is the answer because there are a lot of trees in the rainforest
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Modern cell theory is based on?

Answers

Matthias Schleiden observed that all plants were made of cells;

Theodor Schwann observed that all animals were also made of cells;

and Rudolf Virchow observed that cells only come from other cells,

because of this modern cell theory is around.


im not sure if this is what you need... if there are options that would help a lot!!
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