Which terms best complete the chart about characteristics of human development between fertilization and birth? a. 1) facial features form, 2) heartbeat can be heard, 3) nerve cells develop rapidly, b. 1) heartbeat can be heard, 2) nerve cells develop rapidly, 3) facial features form, c. 1) nerve cells develop rapidly, 2) facial features form, 3) heartbeat can be heard, d. 1) facial features form, 2) nerve cells develop rapidly, 3) heartbeat can be heard

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.

The phlogiston theory in the 17th century attempted to explain burning. the theory stated that combustable objects contained a material called phlogiston, a substance without mass, color, odor, etc. after objects burned, the objects were dephlogistonated and were then in their true form. the phlogiston theory was accepted until the 18th century, when lavoisier proved that combustion requires a gas that has mass. phlogiston is considered a) to be scientific knowledge b) not to be scientific knowledge c) to be proven by scientific method d) to be accepted in the modern scientific community

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime