It's often impossible to repeat trials on the same subjects. 2-Subjects may report an inaccurate medical history. 3-It can be difficult to control all possible variables. 4-It's impossible to come up with testable scientific questions for human subjects.
Answer:
human beings are complex organism because
humans are made up of billion cells and a lot of system and organ.like blood circulatory system,digestion system and so all
If you look at the female cat's genital area,the space just under her tail,it will look like an upside down an exclamation mark (!) with the long slit of vaginal area below the anus. while the male cat has a narrow space between the anus and the penis, with the testicles in the middle... i hope u will understand!... :)
Answer:
we have 2 kidneys
Explanation:
the doctor already knows that we can have one lung or kidney
The 4th one down, then the 2nd, then the 1st.
So that would make:
Carbon from carbon dioxide is used to make G3P, a three-carbon molecule.
The molecule G3P is combined with nitrogen to make amino acids.
The plant assembles synthesized amino acids into proteins.
:)