Answer:
Experimental groups: type of dogs
Dependent variable: hearth rate
Independent variable: the amount of caffeine
Explanation:
The dependent variable is the variable being measured or tested in a given study, while the independent variable isn't changed by the other variables. In this case, the heart rate is dependent on the amount of caffeine, which is then the independent variable. The experimental groups are the groups exposed to the independent variable.
The answer is c
Reason: that’s what happens when the hit hits plants. That’s how they eat
The leaf because it is the major structure of photosynthesis in a plant.
Answer:
natural selection is natural, selective breeding is not. Natural selection is when the best genes are passed down. Selective is when the best of an animal group are forced to mate
Explanation:
The skeletal muscles have striations to do their sacromere anatomy
sacromere which are formed by actin and myosin stacking
sarcomere is the functional unit of muscles and shows striated appearance due to thick and thin filaments
hope it helps
