They are valid because the dependent variable caused a change in the independent variable.
Answer: Option C
Explanation:
The validity of a student’s result is basically based on how the dependent variable caused a change in the independent variable. A dependent variable is one which a scientist produce a variable and finds means to explain it in a proper way. An independent variable is one that is formed to compliment the dependent variable.
When the independent variable increases it causes decrease or increase in dependent variable. A intermediate or intervening variable is found which helps explain about the changes happening between the Independent and interdependent variable.
Answer:
Option (c) ''They are valid because the dependent variable caused a change in the independent variable'' is the correct answer.
Explanation:
The dependent variable is the one which is the center of observation. It is changed during the reaction and affected by it. When we measure the value of the reaction we always measure the dependent variable.
The independent variable is the one that is changed to cause the change in the value of the dependent variable. We can say that the dependent variable depends on independent for its reaction.
So dependent and independent variables are correlated with each other which tells the authenticity of the experiment.
Answer:
its b i took the quiz
B. Many tests must be performed because variables need to be tested one at a time (first test for water effects, then test for light effects, etc.).
C. Some effects take a long time to become noticed, so the experiments often have to take place over long periods of time.
D. All of the above.
Answer:
The correct answer is option D, that is, all of the above.
Explanation:
While performing an experiment to find the effects of the environment on a life form there is a need to consider a lot of factors as many factors in tandem can affect the species in a mentioned scenario. While testing some of the variables would not be seemed obvious at first instance, therefore, in the first look or test, the outcomes are generally inconclusive. At the same time, there is a need for each of the variables to be tested carefully, and also some of the variables may consume more time in order to sound conclusive.
Genetic variation enables bacteria to adapt to changes in their environment. Since, bacteria reproduce asexually (binary fission), they can share genes (genetic transfer) via other mechanisms such as conjugation (exchange of genetic material through direct contact between two bacteria), transformation, and transduction(exchange of genetic material via bacteriophages).
Transformation is a process by which bacteria takes in DNA from its environment through the cell membrane.
Answer:
The Answer is number four
Explanation:
I got it right
B) probably the primitive organism on the left
C) it is certain that the two organisms lived at the same time
D) it is foolish to even speculate about the relative age of the fossils
Answer;
B) probably the primitive organism on the left
Explanation;
The first living organisms we have proof of thanks to fossils, are three and a half billion years old.
Organisms which possess simple body organisation are called primitive organism. They differ from so called advanced organisms as all the activities of life are performed by a single cell.
Primitive organisms do not change their body design so easily as advanced organisms do. Prokaryotes are considered to be primitive forms and eukaryotes are the advanced organisms.
Advanced organisms are complex and have acquired new features morphologically and anatomically by evolution from simpler organisms to better adapt the changing environmental conditions.
Answer:
Weathering and erosion. Weathering is the process where rock is dissolved, worn away or broken down into smaller and smaller pieces.
Explanation:
There are mechanical, chemical and organic weathering processes. Organic weathering happens when plants break up rocks with their growing roots or plant acids help dissolve rock.