An opening or hole in a bone through which blood vessels

Wildfires have both negative and positive effect on an ecosystem. which is a negative effect of wildfire on any ecosystem.

What is the prominent part of animal tissue:

Mendel used over 28000 pea plants in his experiment. how does this large sample size make his results more reliable?

What vascular plant tissue is made of dead cells

Suppose that scientists genetically engineered an organism that could metabolize petroleum more quickly than any other organism. Which would be the greatest effect on society

Compare the age of ocean rocks to that of continental rocks. How does this difference support the idea of seafloor spreading?

An element's atomic number is 5. How many protons would an atom of this element have?

Biology is the study of living things. Why do you think viruses are discussed in biology books?

How many cotyledons would be found in a flowering plant with nine petals on each flower and long leaves with parallel leaf veins? a. Three b. Zero c. Two d. One

Use photosynthesis in a sentence