Simple diffusion and facilitated diffusion both allow molecules to cross the cell membrane without any expenditure of energy by the cell. They are each classified as a type of passive transport.
Answer:
3rd One
Explanation:
1. Doesn't even talking about animals dying
2. Kills of all the fish in one small pond but not the whole species
3. Correct because every individual in a species has been killed
4. They just migrated not died
Answer:
When a light ray encounters a surface, one or more of the following three things occur, the light ray: Reflects off the surface and travels off in a different direction. Passes from one medium into the other and continue on a new, straight line path. Is absorbed.
Explanation:
Answer:
Enantiomers or optical isomers are chiral molecules which are non-superimposable mirror images of each other. ... Different enantiomers fit differently into the various enzymes that drive biochemistry. This explains why they often taste and smell differently and have different effects as drugs.
A common example of a pair of enantiomers is dextro lactic acid and laevo lactic acid
The answer is the option B. Nucleotide. Nucleotides are organic molecules formed by three units :one or more phosphate groups, a sugar with five carbons (ribose or deoxyribose) and a nitrogenous base. Nucleotids are the units that form the two nucleic acid polymers: DNA and the RNA.