What do all members of a biological species have in common

Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect

What is the next step in muscle contraction after the actin changes shape? (apex)

Explain how the political influence of african americans leaders became weaker.