Scientists argue that the first organisms on earth were ___ - - - that is, their metabolism did not require oxygen.

1) multi-cellular

2) anearobic

3) aerobic

Which of the following will occasionally produced a duplicate gene

What is the difference between pure breeding and true breeding

Self pollination is when the pollen from one plant lands on the stigma in the same plant. this process eventually produces many offspring genetically identical to itself and is called -

Cell Function: Passive Transport Why is osmosis important to the survival of a cell?

Classifying living organism using specific characteristics

Which of the following are examples of ways humans and plants have coevolved? Pick all that apply A. Humans have bred plants to use as food B. Plants provide a source of nitrogen C. Humans aid in pollinating plants D.

By what mechanism does PI-3 phosphate promote activation of protein kinase B (PKB) ? a. recruiting PKB to the plasma membrane b. recruiting the activating kinase PDK1 to the plasma membrane c.

What is the definition of "Mass"?

Which of the following is a correct statement? Select one: a. If you want to make a cDNA library, it doesn't matter which tissue you isolate the mRNA from. b.

In fruit flies long wings (W) are dominant to short wings. What is the phenotype of the known parent