Answer:
The primary species something regenerates off of.
For example: Let's say there was an animal called a goblegg.
If the animal who gives it the main components is an chicken, the primary species is a chicken.
Hope this helps!
Plants are called producers because they make their own food. So the grass is the producer.
Answer:
False
Explanation:
The papillary muscles of both right and left ventricles began to contract shortly before the other ventricular muscles (systole) so that they can take up the slack on the chordae tendineae as the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.
They prevent the backward flow of blood to atria from ventricles. So if they contract after the ventricle systole they would not be able to perform their job.
All of them are true to exceptD
New varieties. Natural selection and selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. For this reason selective breeding is sometimes called artificial selection.
Hope I Helped!
( brainliest answer plzz). ;)
