Answer:
The correct answer is -
The independent variable - Humidity levels
The dependent variable - Height
The control group - Tree kept outside of the greenhouse
Explanation:
In this study or experiment, the independent variable is the different humidity level as it is what is changed in the study to see its effect on the growth of the redwood tree. The independent variable is manipulated in the experiment to see the change or effect in the dependent variable occurs.
The dependent variable is the variable which \depends on the independent variable as the Independent variable manipulated the dependent variable is measured to the effect which is the height of the redwood trees here.
The control group is a groub of subjects that did not get the treatment that experiment group recieves as it is kept for analysing the deviation from the natural condition. The control group is the redwood trees that are kept in natural environemnt outside of the greenhouse.
The correct answer is C
<span>Erwin Chargaff's research found that there are two pairs of nucleotides in the DNA molecule, adenine-thymine, and guanine-cytosine.
Those two pairs of nucleotides are complementary and since they pair up in the DNA molecule, the amount of one nucleotide in the pair must be equal to the amount of the other nucleotide of the pair.
He also found that different species have different proportions of nucleotides, which proved that DNA is the carrier of genetic information, not the proteins.</span>
Answer: The correct match for the given organs and function is a s follows-
1) Protects against infection - spleen, lymph nodes
2) Senses stimuli - brain, spinal cord.
Spleen and lymph nodes are the organs of the lymphatic system that help in destroying pathogens ( disease causing organisms) that enter the body of the individual.
Brain and spinal cord are the part of nervous system, which senses the information from environment and interprets it in the form of appropriate response.
Answer:
A, B, C, E
Explanation:
A. not fully submerging the object when doing the fluid displacement procedure.
B. water that is left behind in the collection container when it is transferred for measurement.
C. water that soaks into the materials of the balls, affecting the mass in repeated trials.
E. water in the bucket, approximated to the closest 10 mL due to surface tension at the top of the bucket.
Answer: reproduction
Explanation: the process by which an organism produces its offspring is called reproduction.
