Explain why life as we know it would be impossible without photosynthesis.

Why do you think a messenger is needed to complete protein synthesis?

Why is sedimentary rock the most easily weathered rock?

Is a technique that allows the DNA fragments to separate according to length

How can minerals that must be mined be described? A). as fossil fuels B). as nonrenewable resources C). as resources that will be replenished quickly D). as the remains of organisms that once lived

When are scientific ideas modified? a. When a new scientist becomes more famous b. When there is a change in politics c. When a new, better idea is developed d. When people get tired of the old idea

What is one difference between a cell wall and a cell membrane? 1) Cell walls have gap junctions. Cell membranes have plasmodesmata. 2) Cell walls act as a boundary that nothing can pass through. Cell membranes allow materials in and out of the cell.

Plants have (blank) cells that contain the DNA that decides how they take shape and function Options Elongated Meristem Parenchyma

The number of phenotypes produced for a given trait depends on

In what ways are index fossils and layers of volcanic ash found in ice cores similar?

The percentage of silt in silty clay loam is what? a. 60% to 70% b. 80% to 90% c. 90% to 100% d. 10% to 20%