About how many cells make up a blastocyst? O A. 10,000
O B. 1
O C. 100
O D. 1,000,000

Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse

What happens to the amount of waste in the pond as the ecosystem ages?

Which of the following is not a symptom of desertification?