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Dmitrij [34]
3 years ago
7

How do index fossils help scientists?

Biology
2 answers:
fgiga [73]3 years ago
8 0

Answer:

index fossils are important for index fossils because

they use them to match up rock layers in certain locations

that may be far apart!

So I think it's C

nignag [31]3 years ago
6 0

Answer:

They advance understanding of rock type at the time the organism lived.

Explanation:

 

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If you move a substance from one container to another and its volume changes oh, the substance is a? a) solid b) liquid c) gas d
rosijanka [135]

Answer:

d

Explanation:

With gases they escape into the atmosphere so u cant move it around withoulosing some. With liquids sometimes they get spilled or little bit gets left at the bottom of the original container

7 0
3 years ago
Read 2 more answers
What are the reactants for oxidation reaction?
Alexxx [7]

The reactant that brings about the oxidation is called the oxidising agent, and that reagent is itself reduced by the reducing agent.

Oxidation occurs when a reactant loses electrons during the reaction. Reduction occurs when a reactant gains electrons during the reaction. This often occurs when metals are reacted with acid.

Oxidation is loss of electrons (OIL RIG). Therefore, an oxidising agent takes electrons from that other substance. Therefore, an oxidising agent must gain electrons.

Oxidation happens when an atom loses one or more electrons during a chemical reaction, meaning that its oxidation number increases. This is because the atom loses the negative charge of the electron, which is similar to gaining a positive charge, increasing the oxidation number.

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brainly.com/question/25886015

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6 0
1 year ago
A species of cactus has spines. How would biologists explain how a species of cactus with spines evolved from an ancestral cactu
sergejj [24]

Answer:

It needs the spines for protection

Explanation:

The cactus would develop the spines as a form of protection to protect itself from being consumed and to survive longer.

8 0
3 years ago
Which explanation below best describes why meiosis produces haploid cells?
Agata [3.3K]

Answer:

Egg and sperm cells have to have half the number of chromosomes as in  body cells so when they combine to form a zygote, the zygote is diploid  and has the correct number of chromosomes. This explanation describes why meiosis produces haploid cells.

Explanation:

Meiosis is a type of cell division in which four haploid cells are produced from a diploid parent cell having two copies of each chromosome, where the number of chromosomes in the parent cell is reduced to half by undergoing DNA replication and nuclear division. Diploid cell contains two copies of each chromosome, one inherited from mother and the other from father while haploid cell contains only one copy of each chromosome. Examples of diploid cells (somatic cells) are skin, blood, muscle cells etc. Eggs or ovum (female gametes) and sperm (male gametes) are haploid reproductive cells. If the total number of chromosomes in a diploid cell is represented as '2n', then the number of chromosomes in a haploid cell is 'n'.  During the fertilization process in an organism, the correct number of chromosomes is restored when the haploid male and female gamete combined to form a single diploid zygote, which is the first developmental stage of an organism.

7 0
3 years ago
18 POINTS! IN ADDITION, I will give you BRAINLIEST if your answer is correct, Explain how Newton's 1st Law of motion will be use
g100num [7]

What goes in motion stays in motion, unless friction stops it

3 0
3 years ago
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