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The smallest unit of life is the______ .
a. atom c. cell b. molecule d. organism
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- The ____________ is the basic unit of life. a. organism b. cell c. tissue d. organThe smallest unit of life is the _____.a. atomb. moleculec. celld. organismThe smallest unit of biological structure that meets the functional requirements of “living” is the ______. a. organ b. organelle c. cell d. macromolecule
- ______move around for at least part of their life. a. Living organisms c. Species b. Animals d. EukaryotesCells are? A. None of the above B. Atoms that are bound together C. Tiny units of matter that form molecules D. The smallest units of lifeWhich of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energy
- The simplest structures considered to be alive are :- a. organs. d. organelles. b. tissues. e. proteins. c. cellsLife first appeared on Earth ___________ of years ago.Choose one: A. billions B. hundreds of thousands C. thousands D. millionsCell theory states thata. all organisms have cell walls.b. all cellular organisms undergo sexual reproduction.c. all living organisms use cells for energy, either their ownor they ingest cells of other organisms.d. all living organisms consist of cells that come from othercells
- If your blood pressure raises, blood is allowed to flow to the capillaries which decreases blood pressure. On the other hand, if your blood pressure drops some capillaries are deprived of blood flow to raise blood pressure. This is an example of which property of life? A) All life transforms energy B) All life is organized C) All life maintains homeostasis D) All life evolves E) All life grows and develops F) All life can reproduceAccording to cell theory A. all cells have nuclei B. all cells are living C. cells, are fundamental units of all the living organisms D. cells arise from pre-existing cellsWhich structure is not a component of all cells?a. cell wall c. genetic materialb. cell membrane d. ribosomes
