Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment?
a.type of soil
b.type of plants
c.exposure to sunlight
d.method for measuring the growth

"Exposure to sunlight" is the one among the following choices given in the question that would be the difference between the test group and the control group in this experiment. The correct option among all the options that are given in the question is the third option or option "C". I hope the answer helps you.

Option C, Exposure to sunlight

Explanation:

Given -

Hypothesis - “Plants will grow more when the day is longer.”

Longer day depicts the long time duration during which the sunlight will be available.

Therefore , a test group will comprise of plant species that will be exposed to varied duration of light exposure while plant species in control group would not be exposed to any sunlight to compare and analyse the affect of light on varied growth pattern of plant with variation in light duration.

Hence, option C is correct

bacteria gene

Explanation:

Some bacteria are naturally resistant to certain types of antibiotics. However, bacteria may also become resistant in two ways: 1) by a genetic mutation or 2) by acquiring resistance from another bacterium.

Mutations, rare spontaneous changes of the bacteria's genetic material, are thought to occur in about one in one million to one in ten million cells. Different genetic mutations yield different types of resistance. Some mutations enable the bacteria to produce potent chemicals (enzymes) that inactivate antibiotics, while other mutations eliminate the cell target that the antibiotic attacks. Still others close up the entry ports that allow antibiotics into the cell, and others manufacture pumping mechanisms that export the antibiotic back outside so it never reaches its target.

Bacteria can acquire antibiotic resistance genes from other bacteria in several ways. By undergoing a simple mating process called "conjugation," bacteria can transfer genetic material, including genes encoding resistance to antibiotics (found on plasmids and transposons) from one bacterium to another. Viruses are another mechanism for passing resistance traits between bacteria. The resistance traits from one bacterium are packaged into the head portion of the virus. The virus then injects the resistance traits into any new bacteria it attacks. Bacteria also have the ability to acquire naked, "free" DNA from their environment.

Any bacteria that acquire resistance genes, whether by spontaneous mutation or genetic exchange with other bacteria, have the ability to resist one or more antibiotics. Because bacteria can collect multiple resistance traits over time, they can become resistant to many different families of antibiotics.