Anne has been observing human embryos in different stages. She wants to study the gastrula phase. How will she find it?

Through which material can light waves travel but sound waves cannot travel?

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The speed of light in a vacuum is approximately 299,500,000 meters per second. In scientific notation, we can write this number as a * 10b where a = and b =.

Characteristics of plant cells include which of the following?

Numerous earthquakes occur at the San Andreas fault because it: A. is located near a volcano B. is the boundary between two plates C. used to be a trench D. is the site of many turbidity currents

Homeostasis is classified under which of the following A. Cell respiration B. Transcription C. Cell regulation D. Photosynthesis

A ball, with a mass of 10 kg, is dropped from the top of a building, from a height of 20 meters. Explain what will happen to the potential energy if the 10 kg mass is replaced with a mass of 40 kg and the height of the drop remains constant.

Which of the following is a disadvantage of animal endoskeletons? a. Endoskeletons allow organisms to grow large in size. b. Endoskeletons don't need to be molted as an organism grows. c.

A species of cactus is adapted to a desert climate. Over a period of many years, the climate becomes wetter. How will the cactus population most likely be affected by this change? A It will grow as more water resources become available.

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