Cara is explaining to her sister how the solar system formed. Which description would she use to explain the solar nebula A. a rotating cloud of dust and gas

B. a disk of material surrounding a young star

C. a small body from which planets form

D. a rocky core surrounded by a deep atmosphere of gas and ice

Aneuron is stimulated with an electric pulse. the action potential is detected at a point 3.70 cm down the axon 0.0052 s later.when the action potential is detected 7.20 cm from the point of stimulation, the time required is 0.0063 s. what is the speed of the electric pulse along the axon? (why are two measurements needed instead of only one? )

What happened to rosalind franklin in 1956?

What is the process of a new plant growing from its seed into a seedling? primary growth fertilization pollination germination