Based on the image below, what is the most abundant element found in Earth's crust?
Abundance of Elements in the Earth's Crust
Aluminum
Iron
Silicon
Calcium
Sodium
Magnesium
All Other Elements
Oxygen

What is the next step in muscle contraction after the actin changes shape? (apex)

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.