Q: What do we call the system of classification consisting of a hierarchy of groupings called taxa? Choices: - lamarckian system - linchpin system - crocodilian system - linnaean system A:
linnaean system

(Question)
Q: Many species secrete a hard external skeleton of what? Choices: - sodium bicarbonate - hydrogen carbonate - carbon dioxide - calcium carbonate A:
(Answer)
calcium carbonate

Ques: Q: How many pi bonds are found in a triple bond? Choices: - 10 - six - four - two A:
Ans: two

(Q).
Q: What is the release of particles and/or energy from the nucleus of an atom described as? Choices: - kinetic energy - momentum - temperature - radioactivity A:
(A).
radioactivity

Ques:Q: What type of gases are used for balloons, light bulbs and lighted signs? Choices: - ignoble - helium - heavy - noble A:

Ans:noble

Q: What contain organelles common to other cells, such as a nucleus and mitochondria, and also have more specialized structures, including dendrites and axons? Choices: - follicles - blood cells - muscle cells - neurons A:
neurons