Answer:A culture or growth medium
Explanation: A culture or growth medium contains essential nutrients that aids in the growth of microorganisms. A culture medium can be in liquid form or solid form. It is very important to make sure that a culture or growth medium is sterile and free from any form of contamination. The main function and importance of a culture or growth medium is to ensure that microorganisms grow in a sterile environment that has all the major and essential nutrients required for their growth and to preserve them against any form of harm or contamination such that when these organisms are needed they can be used.
A star is provided with energy by a nuclear fusion reactions in its core. A nuclear fusion reaction occurs when the nuclei of two atoms combine to create a new atom. Most commonly, in the core of a star, two hydrogen atoms fuse to become one helium atom.
Answer: False
Light receptor cells are not present in the skin but they are present in the retina of the eyes.The retina is the black part of the eye that exhibit light sensitive receptor cells called as rods and cones. Rods are sensitive to the intensity of light and cones are sensitive to color of light.
Answer:
这/那是……。 这/那是…… 吗 这/那不是 ...
妹妹背著洋娃娃
Explanation:
