23. Fossils are rare because:

a. Only certain parts of organisms can fossilize

b. Very few organisms have died

c. They are only found in North America

d. Fossils are very common, silly

Which row in the table accurately categorized the plants as gymnosperms and angiosperms.

Sustainable use is often defined as the use of natural resources at a rate that meets the needs of the present human population but which also allows future generations to use the resource to meet their needs.

In caenorhabditis elegans, the level of expression of genes on both x chromosomes of females is reduced by half. what phenomenon is this an example of?

Hemophilia is a blood disorder that is caused by a recessive allele on the X chromosome and a condition occurs most often in males. What type of inheritance pattern is shown with hemophilia? A) co-dominance B) Sex-Linked C) Multiple Alleles

What statement is true about natural selection and evolution A. Evolution is the mechanism by which natural selection occurs B. Natural selection and evolution both show change over time C.

What are three examples of homeostasis in the digestion process?

How do the three different types of neurons function

What is the difference between covalent bonds and ionic bonds? A) Covalent bonds are formed between atoms to form molecules; ionic bonds are formed between atoms to form compounds.

Although trees like this one begin life as a seed, throughout growth and development the cells of the organism continually change. As a mature tree, several layers of cells in the secondary xylem or wood of the trunk are

1. The formula for calculating the surface area of a cube is: SA = length * width * number of sides (6) Therefore, the surface area of a cube that is 1 cm on a side is 1 cm * 1 cm * 6 sides = 6 cm2 2.