I think they use the scientific method
Answer:
When using random sampling techniques, large numbers of samples/records are taken from different positions within the habitat. A quadrat frame is most often used for this type of sampling.
Enzymes are catalysts, which means that they make chemical reactions go faster, but are not changed by the reaction. For example, digestive enzymes cause food that you eat to be broken down much faster than would occur without them, but they are not broken down in the reaction they are speeding up.
Research has shown that people who have a chronic disease or have low energy levels also have lower enzyme content in their blood, urine, and tissues. While there is clearly a direct relationship between disease states and a person's enzyme levels, only recently has the NATURE of that relationship been better understood. Researchers began to question if a person's enzyme levels were low because they were sick or were they sick because their enzyme levels were low. The researchers found something surprising.
<span>A person may not have a low enzyme content because he is sick or old, but instead, the reason a person may be sick or old is because of low enzyme content.</span>
Answer:
question no 1 answer
A root hair,or absorbent hair, the rhizoid of a vascular plant, is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root. As they are lateral extensions of a single cell and only rarely branched, they are visible to the naked eye and light microscope. They are found only in the region of maturation of the root. Just prior to and during root hair cell development, there is elevated phosphorylase activity. Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. Another adaptation that they have is a large permanent vacuole.
question no 2 answer
Answer: Stems hold the plant upright and support it. They also transport water, minerals and sugars to the leaves and roots.
hope it helps
because i have taken it on by book
