D. It provides information about the subject of an experiment.
Background research is research prior to conducting an experiment.
Explanation:
Background research is important so as to fully understand the variables that are being controlled and tested in an experiment, and their relationships that will give insights into how to design the experiment. The background research is also important in identifying the research problem setting up of a good hypothesis.Background research also reduces the rate of failure of an experiment due to proper preparation.
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<span>Molecular clocksC. take advantage of known mutation rates to estimate how long ago organisms shared a common ancestor.
All of the following are important properties of prokaryotes except
A. prokaryotes are used to make many products for humans.
All of the following patterns were witnessed by Darwin except that species vary
C. within very short spans of time.
The scientific name for a white oak is Quercus alba; the scientific name for a red oak is Quercus rubra.What does this tell you about the organism?
D. White oaks are grouped in the same species category as red oaks.<span>
</span></span>
Answer: B) are excited by light that falls in the center of their receptive field.
Explanation:
There are two types of bipolar cells present in the retina which are differentiated on the way the centres of their receptive fields respond to light. The names of bipolar cells are ON-centre and OFF-centre.
If a light fall at the centre of the receptive field of a bipolar cell, it will experience an exciting effect on that cell, resulting in it being depolarized, it is an ON-center cell.
Hence, the correct option is B.
Hi! Can you please make your question clearer ?
D. A variable or alteration to one part that affects an entire system
Explanation:
When talking about natural and physical systems, change is a variable or alteration to one part that affects an entire system.
Systems are groups of processes that have the same overall function. There are several types of interacting components that makes up both physical and natural systems in our world.
- The part of system is related and interconnected via the changes they undergo.
- Changes typically causes variation or alteration of parts of a system.
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