Answer:
Advantageous
Explanation:
Natural selection acts on traits that are advantageous, thus increasing chances of survival and passing on the trait.
Answer:
B. The amount of lee that melted.
Explanation:
The dependent variable is more of what results from an action during an experiment. It is actually what is being tested for. In the experiment, the scientist seeks to understand the effect of salts on melting point of ice. He selects the different salts which can cause a ice to melt (independent variables) then he sets up to find out the effect of the salt on the ice.
He cannot control how much ice will melt. The properties of the salts would determine the extent and rate of the dissolution of the ice pack. This is the dependent variable which relies on the nature of the salt.
Answer:
The correct answer is - 1. true, 2. true, 3. false, and 4. true.
Explanation:
1. Rod cells are the photoreceptors present in the retina that are hyperpolarized not depolarized in dark due to sodium ions efflux.
2. Depolarisation of the bipolar cell of the retina by glutamate release by rods and cones.
3. The adaption according to the light is known as a light adaptation which takes place due to a large part of photochemical in both rods and cones which is reduced to retinal and opsins.
4. when the light reaction takes place retinal converted to opsin
A firefighter wakes up in the middle of the night to the sound of an alarm. it is likely that her adrenal glands have released epinephrine and norepinephrine.
The medulla of the adrenal glands secrete the hormone epinephrine, which is also known as adrenaline. Epinephrine is released into the bloodstreams when a person experiences strong fight or flight emotions. This leads to an increase in the rate of the heart beat, muscle contraction and movement.
<em>The technique of lowering the cover slip at an angle is used to;</em>
B. Reduce the formation of air bubbles
<u>It is essential that the technique of lowering the cover slip at an angle is used to put a cover slip at that angle and to lower it onto the specimen to avoid creating air bubbles which would interfere with the view.</u>
