Descriptive investigations involve collecting data about a system, but not making tests or experiments.
Making tests belongs to experimental investigations.
Descriptive investigations aim to draw conclusions from observations of the fenomena, while experimental investigations design tests that let the researcher to compare results on different conditions with a control situation.
There is also the so called comparative investigations which collect data from under different conditions but do not include the control situtation.
Answer:
The primary and secondary responses are equal
Explanation:
Primary and secondary are considered to be two responses of immune to the antigen.
Primary response occurs at the first encounter between the antigen and immune. This response can be as long as 14 days depending on the antigen category.
There are two cells in the body that act as a defensive system and antibodies against antibodies.
the secondary response occurs when a person exposed to the same antigen repeatedly
The statement ‘Studies investigating the benefits of
meditation and biofeedback have shown mixed results’ is false. Meditation is a
state of processing a peaceful mind and biofeedback is to train people with health
problems.
Answer:
The primary mechanism for the diversification of venom is thought to be the duplication of gene coding for other tissues, followed by their expression in the venom glands. The proteins then evolved into various venom proteins through natural selection.
Explanation:
