What is the electron configuration of an element with atomic number 20? A. 1s2 2s2 2p6 3s2 3p5 B. 1s2 2s2 2p6 3s2 3p6 C. 1s2 2s2 2p6 3s2 D. 1s2 2s2 2p6 3s2 3p6 4s2 E. 1s2 2s2 2p6

Describe the energy transformations that happen in a bird from when he eats his food to when he moves his muscles in flight.

Blank molecules make up proteins A. Carbohydrate. B. carbon dioxide. C lipid. C amino acid D water or E. hydrogen

Which stage comes first in the process of embryonic development

What is meant by extinction

When during the cell cycle do chromosomes first become visible? A) Interphase B) Cytokinesis C) Prophase D) G1 phase

Hat is the main reason that people are hesitant to use nuclear energy? a. It produces radioactive waste. b. It uses large amounts of water. c. The ore used for nuclear energy must be mined. d.

What kind of information does the nutrition facts give about requirements for essential nutrients?

Consider y=-5x+2 find the equation of the line that is parallel to - 4,8

What are the major groups of organic compounds studying biology

Which was part of Aristotle's primary biological classification system?