Answer:
Minivalves will allow fluid in when external pressure exceeds internal pressure but will prevent fluid loss when the pressures are reversed.
Explanation:
1. guanine
2. adenine
3. cytosine
4. thymine
5. uracil
Answer:
The options:
1. "We need to discourage him from wearing eyeglasses."
2. "We need to place objects in his impaired field of vision."
3. "We need to approach him from the impaired field of vision."
4. "We need to remind him to turn his head to scan the lost visual field."
The CORRECT ANSWER IS 4.
"We need to remind him to turn his head to scan the lost visual field."
Explanation:
Homonymous hemianopsia is defined as a depletion of half of an individual visual area.
The patient with homonymous hemianopsia needs to position objects in the unimpaired area of vision, with the need for the nurse to come closer to the patient from the unimpaired area.
The nurse gives an order to the patient to make a quick view of the environment to repress the visual depletion and involving patient enlightenment from the inner region of the unimpaired area of vision.
The nurse could recommend the aid of personal eyeglasses, if the need eyeglasses are present at that time.
85% of adults are grandparents by age 65. This estimation has been made in the U.S. from the surveying of the elderly. So, the correct choice is the third option: 85.
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- Dotz
Answer: the control group was grown at a pH of 2
Explanation:
Seeds comprise a radicle, which descends and becomes the root system; the endosperm, containing stored food; an epicotyl, which develops into the stem and the seed coat that protects the seed. which are small food storage organs and plant embryos encased in a seed coat. These embryos require specific conditions in order to break their dormancy; seed dormancy is a temporary state in which plant development and growth are halted, until specific conditions required for germination to occur. Conditions required for seed germination:
- Light- some seeds require light to break their dormancy
- Oxygen- for respiration
- Water- protein hydration and enzyme activation; should be near to neutral pH
- Temperature- a specific range 20-30 °C which activates specific enzymes needed for growth
During the germination process, plants emerge from the seed and start growing. However, the delicate tissue structures can be damaged by low pH; this can occur due to acid rain, where the pH of the rainwater is lowered by the presence of pollutants.
Due to the presence of atmospheric carbon dioxide, normal rain’s pH is typically around 5.6, and in heavily polluted areas with other gases as pollutants, acid rain’s pH can range from 3-4. A highly acidic pH of 2 can denature enzymes required for germination and seed growth; apart from causing damage to the entire seed, there’s no expected growth at this pH range making it a suitable control.
Experimental controls give valuable information about the experiment’s conditions and validity; they are usually carried out in the same conditions as the other experiments, but the independent variable (pH) is usually changed.