Answer:
A) They only replicate the same time as the larger chromosome.
Explanation:
- Plasmids are small, circular, double stranded DNA molecule, which can replicate independently from its chromosomal DNA.
- If plasmids are used for experiments, they are called vectors.
- Scientists use plasmids as tools for cloning, transferring and manipulating genes.
- They are distinct from chromosomes in being non-essential.
- Plasmids are sometimes present in archaea and eukaryotic organisms.
- Plasmids often carry genes that benefit the survival of the organism, such as by providing antibiotic resistance.
- They do not replicate the same time as the larger chromosome.
Answer:
B. remove waste
Explanation:
The main function of the excretory system is to remove waste.
I have just taken the test, and the answer is in fact B.
Answer:
An organism is able to produce sweat so that it cools off which helps it to cool down when exposed to high temperatures.
It's vessels are able to vasodilate and vasoconstrict to regulate temperature.
An organism stores fat as an insulator.
Eye pupils dilate and constrict to control the amount of light entering the eye.
If an organism touches a hot surface, nerve impulses are sent to the body to move and not get injured.
In a nutshell: an organism maintain a constant internal environment with homeostasis. And is able to respond to changes in the atmosphere by electrical impulses (nervous system) or the endocrine system by the release of chemicals (called hormones)
