Answer:
This is an controlled experiment because he is only changing the amount of carbon dioxide in the air. Since he is only changing one variable at a time and comparing it to a natural, unaltered tomatoe area, his experiment is controlled.
Explanation:
The definition of a controlled experiment is a test where the person conducting the test only changes one variable at a time in order to isolate the results. An experiment where all subjects involved in the experiment are treated exactly the same except for one deviation is an example of a control experiment.
Answer: C
Explanation:
Viruses don't have cell walls that can be attacked by antibiotics; instead they are surrounded by a protective protein coat. Unlike bacteria, which attack your body's cells from the outside, viruses actually move into, live in and make copies of themselves in your body's cells
Sunlight. Just think about the word "radiant."
Answer:
I believe it's a dominant allele
Explanation:
Recessive allele means one is present... A hybrid is the result of two different breeds breeding. A purebred is an organism that always passes down the same genetic makeup.
Your DNA determines how many muscle fibers a person is born with. This
number never changes cause one can't make more muscle fibers during
their lifetime. With more muscle fibers, one has the potential to be
stronger.
It is an acquired trait because you could train your
muscles to become bigger. When you train, for example resistance
training, your muscle produces more myofilaments which increases their
diameter. This is why you develop large muscles when you train.
Hope this helped!