Of the following biological levels of organization, which represents the smallest or lowest level?

tissues

organs

cells

populations

Why is genetic drift most common in small populations

Which of the five kingdoms in Whittaker's phylogenetic tree are prokaryotic, and which are eukaryotic?

Which three body systems work together to obtain and distribute oxygen and nutrients?

Bottled water companies and many other industries remove water from a ground source and transport it away. What problems arise from this?

Describe the geologic column and its weakness. also explain how the ages of the rocks are determined by radiometric dating and other methods and why these methods are faulty?

Usually flowers contain more stamens than pistil. Why?

Choose all the answers that apply. Water: 1. can dissolve most substances 2. has a strong attraction to itself 3. is neither acidic nor basic 4. contracts when it freezes 5. heats up and cools down more quickly than land

A seismic station recorded the P-wave, but no S-waves, from an earthquake because S-waves were what?

In vertebrates, what joins the brain to the rest of the body? A. spinal cord B. medulla oblongata C. peripheral nervous system D. vertebral column

Flagship species are often the focus of successful conservation efforts. What are the advantages and disadvantages of this approach to biodiversity conservation? Do you think the advantages outweigh the disadvantages?