1) Layers of cells that form a basic structural material of a plant or animal are known as
A.) system
B.) organ
C.) tissue
D.) organism
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2)
All of these plant structures are used in reproduction except
A.) spore
B.) stamen
C.) pistil
D.) phloem
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3)
A nonliving or chemical factor that affects the ability of organisms to survive and reproduce is called
A.) a limiting factor
B.) a biotic factor
C.) an abiotic factor
D.) succession
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4)
The phyla that is the largest and most diverse is the
A.) sponges
B.) flatworms
C.) arthropods
D.) chordates
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5)
In order to survive all organisms must be able to do all of these except
A.) grow
B.) reproduce
C.) move from place to place
D.) eliminate wastes

Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative

Agas has an empirical formula ch4. 0.16g of the gas occupies a volume of 240cm^3 what is the molecular formula of the me anyone who !

The limiting reactant(s) appeared to be