Answer:
The correct answer is: Yes.
Explanation:
- Conducting research on human subjects and specimens require the research organisation to obtain prior permission or consent from the person on whose specimen the research is being conducted.
- These ethical guidelines provided by the ethical committee need to be followed by all the research organisations and scientists.
- De-identification of biological specimen refers to the non-revelation of identity and preservation of the confidentiality of the person from whom the biological specimen is derived. The person from whom the biological specimen is obtained is made anonymous.
- According to the question, Investigator A obtained the biological specimen from human subjects for conducting research on emphysema.
- Under conditions of de-identification of the specimen, the specimen can be used by the Investigator B for performing research on lung cancer without the necessity for a re-consent.
Answer:
Scientists define density as the mass of a substance per unit volume. The word “per”
signals that thinking about density requires thinking about a relationship. It is the relation
between the mass (or weight) of one unit of a material and the volume of that one unit.
Density cannot be directly perceived or measured. It must be inferred from the
relationship of the mass and volume. However, it can be determined by calculation
which is how many schools teach it. To calculate density, you first measure the weight
and volume of an object precisely, then you divide the mass by the volume (i.e. d=m/v,
density equals mass divided by volume). So for example, the density of water is 1 gram
per cubic centimeter because a volume of 1 cubic centimeter of water has a mass of 1
gram. A substance which has a mass of greater than one gram per cubic centimeter
has a density greater than 1.0 gram per cubic centimeter; a substance which has a
mass of less than one gram per cubic centimeter has a density of less than 1.0 gram
per cubic centimeter.
Explanation:
Answer: The action of a neurotransmitter at the postsynaptic cell is terminated by the following: enzymatic degradation, diffusion or reuptake into the presynaptic cell by specific transporters.
Explanation: After a neurotransmitter has bound to its receptor on the postsynaptic membrane and triggered a biological response, in order to avoid over stimulation of the receptors, the neurotransmitter is either degraded by specific enzymes or taken back to the presynaptic cell into the synaptic vesicles by action of specific transporters. This mechanism is to maintain a balance (homeostasis).
Answer:
The correct options are:
- <em>The population of birds with large beaks will increase on the island.</em>
- <em>The trait for large beaks will be passed on to future generations through natural selection.</em>
Explanation:
According to the theory of natural selection, those organisms tend to survive in an environment which are better adapted to live in an environment and which can better adapt to changes that occur in an environment.
The drought caused the small, soft seeds to decrease more in number as compared to the large, hard seeds. As a result, the birds having large beaks were better adapted to live in the environment as compared to the birds having small beaks. So the population of the large beak birds increased and they passed their characteristics to the future generations.
Answer:
A. It would contaminate the land and water with dangerous poisons
Explanation:
Putting medical and chemical waste into landfills has extremely dangerous consequences to the environment and public health.
If they were put into landfills, these toxic wastes would leech into the soil and groundwater below them.
These toxins can accumulate over time, and harm plants and animals.
Humans may also absorb these toxic chemicals.
So, the correct answer is A. It would contaminate the land and water with dangerous poisons