Answer: Disinfectant is a chemical formulation which may include biological components used to reduce the population of a microbe from a living or dead surface.
Explanation:
The plant tissue is treated with a disinfectant before culturing it and growing new plants. This is done to remove dirt, dust, foreign particles like pollen, microbes from the plant tissue surface or from plant part. This help in growth of disease free and contamination free plants. The culture can be utilized for different cycles of plant growth as it remains free from any kind of contamination.
Answer:
sand silt dead crustaceans and stones
<h2>Interactions </h2>
Explanation:
1) Direct interaction: A direct interaction deals with the direct impact of one individual on another when not mediated or transmitted through a third individual
Direct interactions in the given habitat are:
- Bee and dragonfly
- Dragonfly and fish
- Terrestrial flowering plant and bee
2) Indirect interaction: An indirect interaction is the impact of one organism or species on another that is mediated or transmitted by a third
Indirect interactions in the given habitat are:
- Bee and fish
- Dragonfly and terrestrial plant
- Terrestrial flowering plant and fish
Answer:
D. Use the polymerase chain reaction.
Explanation:
<em>Option A is incorrect because subjecting the DNA to electrophoresis will only identify, purify or quantify the DNA.</em>
<em>Option B is incorrect because nucleic acid probes are only useful in detecting mRNA.</em>
<em>C is incorrect because amniocentesis is just a medical procedure involving the removal of amniotic fluid for the purpose of analysis.</em>
<em>Option E is not correct because restriction enzymes will only cut the DNA at specific points.</em>
The correct option is D. Polymerase chain reaction is a procedure in molecular biology that is utilized to amplify or multiply a copy of DNA.
