Answer:
Trees remove carbon dioxide from the atmosphere. Carbon dioxide is a greenhouse gas that causes global warming.
Explanation:
Trees take in carbon dioxide and release oxygen. Deforestation gets rid of trees, so carbon dioxide is no longer being absorbed. Since carbon dioxide is a greenhouse gas, meaning that it traps heat in the Earth's atmosphere, too much of it causes global temperatures to rise.
The male
human has a sperm cell and the female has an egg cell. The cells from the male
and female that combine to form a zygote are called gametes. The human sperm
and egg cells each contain 23 chromosomes. . A combination of gametes forms a
zygote with 46 chromosomes. The type of cell division that produces gametes
with half the normal chromosome number is the meiosis. Meiosis is the type of
cell division used in sexual reproduction. It will occur in the testes and
ovaries.
Answer:
Photosynthesis happens when water is absorbed by the roots of green plants and is carried to the leaves by the xylem, and carbon dioxide is obtained from air that enters the leaves through the stomata and diffuses to the cells containing chlorophyll.
Explanation:
Answer:
the presence of chloroplasts
Explanation:
Here is the complete question:.
Which of the following is not evidence that charophytes are the closest algal relatives of plants?
A)similar sperm structure
B)genetic similarities in chloroplasts
C)similarities in cell wall formation during cell division
D)the presence of chloroplasts
E)similarities in proteins that synthesize cellulose
And the answer is
D)the presence of chloroplasts
Answer:
The correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
DNA is the genetic material of most of the living organisms. In this question, Joe wants to study to see the effect of folic acid on the synthesis of the DNA. Folic acid ae the essential nutrients or vitamin for the synthesis of nitrogen bases of the DNA that are purines and pyrimidines. A dependent variable and an independent variable are two important part of any experiment.
A dependent variable is a variable being tested and measured. In the experiment Jon is conducting, the amount of DNA becomes a dependent variable that is being tested and measured in the presence of folic acid. And folic acid is the independent variable tested to check the formation of DNA in bacteria.
Thus, the correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
