Answer:
C. empirical evidence
Explanation:
Empirical evidence is a type of knowledge obtained through sensory experience, that is, through the process of observation and experimentation. Empirical evidence is often used during the application of the scientific method to test a hypothesis. In the example in question, Peter Grant obtained empirical evidence about birds' biology to verify that his assumptions about their evolution were correct.
A negative reaction in the body
I think it's agriculture.
Occurrence: Spermatogenesis occurs inside the seminiferous tubules of a testis whereas oogenesis occurs inside the ovary. The product form in spermatogenesis is sperm which is flagellated i.e. motile and the product form in an Oogonium is ovum which is non-motile.
Growing willow for biofuel is sustainable development because it is a source of fuel which potentially will never run out. For every willow tree that is cut down, another can be planted in its place. This means that the source of fuel is potentially limitless and subsequently sustainable.
