Answer:
B; Protective enzymes found in some bacteria that "restrict" the type of DNA allowed in the bacterial cell by catalyzing the cleaving of other types of DNA.
Explanation:
A restriction enzyme is a protein that recognizes a specific, short nucleotide sequence and cuts the DNA only at that specific site, which is known as restriction site or target sequence.
Answer:
An object can convert it's potential energy into kinetic energy. For example see the below figure, where potential energy of water has been converted into kinetic energy. A moving body can transfer some of its energy to set another body into motion. ... So, object what you are speaking about is nothing but energy (mass).
Explanation:
Answer : The correct answer is -
D.Protista and Eubacteria.
Autotrophs are the organisms that can synthesise their own food using substances available in their surroundings with the help of either chemical energy (chemosynthesis) or light energy (photosynthesis).
Heterotrophs on the other hand, can not synthesise their own food and depend on either plants or animals.
Out of the given options, Protista and Eubacteria conatin autotrophs or heterotrophs.
Example- Protozoa (animal-like protists) are heterotrophs that ingest or absorb their food and helps.
Algae, which is a protist and obtains nutrition through photosythesis.
Slime moulds, which are fungus-like protists and are heterotrophic.
Cyanobacteria (also called blue green alage) is a photosynthetic bacteria (belongs to Eubacteria).
Answer:
Gas exchange during respiration occurs primarily through diffusion. Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs.
Explanation: