Unlike the cell membrane, the cell wall is

a

selectively permeable.

b

composed of a lipid bilayer.

c

found in all organisms.

d

a rigid structure.

Explain the connection between the beginning of life and the universal genetic code

Which month had the most rain?

Carbon is ideally suited to form ___. A) ionic bonds B) covalent bonds C) metallic bonds D) gases

Which one of the following statements is true of enzyme catalysts? A) Their catalytic activity is independent of pH. B) They are generally equally active on D and L isomers of a given substrate.

In a simple mendelian cross, true-breeding tall plants (tall is dominant) are crossed with short plants (short is recessive), and the f1 plants, which are all tall, are allowed to self-pollinate. what fraction of the f2 generation are tall?

Which physical evidence supports the evolution of Earth due to deposition?

In a very small population of birds, assume there are two types of alleles that control feather color. 5 out of 20 total alleles in the population code for blue feathers.

Water, air and plants are examples of

The age of one rock layer compared to the age of another rock layer is its o comparative age O relative age actual age o conformity

Does cytokineses occur before or after mitosis?