Chemical analysis indicates that the cell membrane is composed mainly of:

1) proteins and starch
2) proteins and cellulose
3) lipids and starch
4) lipids and proteins

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Individuals do not compete directly for resources, but are prey for the same predator

Explain how mendel kept his pea plant from self pollination