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kiruha [24]
3 years ago
15

Scientists can determine the age of a layer of rock by

Biology
1 answer:
Semmy [17]3 years ago
3 0

Answer:

The answer is (C) studying how is has been affected by erosion

Explanation:

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What is the difference between independent and dependent variables
trasher [3.6K]

The two main variables in an experiment are the independent and dependent variable.

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

A dependent variable is the variable being tested and measured in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.

For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light. The brightness of the light is controlled by the scientist. This would be the independent variable. How the moth reacts to the different light levels (distance to light source) would be the dependent variable.

When results are plotted in graphs, the convention is to use the independent variable as the x-axis and the dependent variable as the y-axis.

4 0
3 years ago
Who is the father of genetics and what was his contribution?​
max2010maxim [7]

Answer:

The father of genectics is mendel, and he had shaped genectics as we know it today

Explanation:

6 0
3 years ago
Read 2 more answers
Can someone please help
____ [38]

2. The structure of a hammer is related to its functions as it shape and hard tip effectively does its job. (Smashing thing, etc.) Its anatomy directly correlates with its function.

8 0
3 years ago
As a final exam question in your biology course, you are asked to identify an animal that you immediately recognize as a chordat
julia-pushkina [17]

Answer: c) and b) are correct.

The brain is encased in a protective bony or cartilaginous housing in craniates.

The anterior end of the nerve cord is elaborated to form a brain in craniates.

Explanation: The craniates include the chordata with well-defined heads. This includes mammals, reptiles and fishes. So we can discard the other answers. Because most craniates have functional jaws, and the adults do not lose their chordate characteristics. The last one does not apply as a specific feature because the tunicate have neural crest but are not recognized as craniata.

8 0
3 years ago
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To trace our maternal lineage, we observe mutations that have accumulated in our mitochondrial dna (mtdna). in the dna isolation
Sergio [31]
In the coding region, natural selection tends to eliminate all of the mutations because of the high importance these regions have. The coding region contains genes that synthesize proteins and the changes in the DNA sequence can have devastating effects on the cell. Therefore, there are very few differences in the sequences of coding regions that can help us trace the lineage.
On the other hand, in the non-coding regions, the mutations often accumulate because they have little effect on the cell and the adaptive value of the organism. This enables us to trace up the lineage by comparing the sequences and seeing the differences in the sequences. 
4 0
3 years ago
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