Root hairs have hair like extensions which help increase the surface for absorption of water and mineral salts from the soil. It is similar in function to the villi of the intestinal tract which also has hair like extensions to increase the surface area for absorption of nutrients.
Answer:
The definition of energy is the ability to do work.
One way to think abnout is whenever you have a lto of eneergy you can do a lot of work, but with little energy you can't do much work.
Answer: The theory of cheek cells is used for the identification of cheek cells.
Explanation:
The cells of cheek do not have cell wall. They have a cell membrane which allows on certain molecules to pass through it. The nucleus is located centrally in the cheek cells and it stores the DNA. It can be stained with the help of the methylene blue reagent. It appears blue in color which can be observed under the microscope. The cheek cells can be isolated from the buccal cavity by using cotton buds and cotton swabs can help in isolating the cells.
The answer is; B
As air cools, its capacity to hold moisture reduces. This is is why as warm humid air cools, it reaches a saturation point, and the water moisture begins to form droplets. These droplets form clouds in the atmosphere.
The mathematical evaluation methods use to calculate benefits and costs can make the calculation of cost benefit analysis to be very complicated. The definitions and calculations of benefits and costs are quite controversial in term of the valuation and discounting calculation methods that are applied to them.
