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Marina CMI [18]
2 years ago
12

Make a claim about how light moves through different materials. A claim is a statement that you can prove with evidence. Use evi

dence from the model (screenshots- see below, measurements, observations etc.) to support your claim.
Biology
1 answer:
alexgriva [62]2 years ago
3 0

Answer:

The further the light moves from the plant, the fewer oxygen bubbles are produced by photosynthesis. The intensity of light at different distances from a light source can be described by the inverse square law.

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What is a joint? describe the function of movable joints in the body?
alukav5142 [94]
A Joint<span> is where two adjacent bones or cartilages or combinations thereof meet. They provide the mechanism that allows the </span>body<span> to move. They are classified according to their degree of movement as </span>movable<span>, partially </span>movable<span> and immovable </span>joints<span>.</span>
7 0
3 years ago
What is one difference between natural selection and artificial selection?
Goshia [24]

Answer:

B

Explanation:

Natural selection and selective breeding can cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. For this reason, selective breeding is sometimes called artificial selection.

4 0
2 years ago
Which of the following is not a source of groundwater pollution? A.landfills b.septic tanks c.smoke stacks d.fertilizer
Crank

The correct answer is c. smoke stacks.

Smoke stacks are chimneys or funnel shaped structures which emit smoke from a factory, vehicles and industrial set ups. Smoke stacks mostly discharge carbon dioxide and water vapor and oxides of nitrogen into the atmosphere. The exhaust released from smoke stacks cause air pollution. Air pollution can cause ailments like asthma and cancer. Thus, smoke stacks are not a source of water pollution.  

8 0
3 years ago
When the polymerase chain reaction (PCR) is used to amplify segments of DNA, the sample is first heated, and then cooled, in cyc
baherus [9]

Answer:

At least 17 PCR cycles or 16 PCR cycles

Explanation:

As we know -

In one chain of  heating and cooling  of polymerase chain reaction (PCR), the strands of DNA gets doubled.

The general mathematical representation of this is

{2^n - (2 *  n)}

where "n" is the number of PCR cycles.

It is given that DNA strands  to be produced is 16 times the original quantity of DNA.

So the PCR cycle must be carried out at least 17 times in order to have DNA strand not less  than 16 times the original quantity of DNA

8 0
2 years ago
2. What is the complementary DNA sequence for the following DNA strands? Write the sequence of the complementary strand below th
DaniilM [7]

Answer:

CGTATC - DNA complementary strand- GCATG

CTTTCAAG- DNA complementary strand-GAAAGTTG

GAGACTTAC-DNA complementary strand-CTCTGAATG

Explanation:

Remember that the complementary sequence will be based on base pairing for DNA, so the A will pair with T, C with G

6 0
2 years ago
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