Fish have what type of circulatory system?

1) In the aquatic ecosystem shown, which organism would be considered a secondary consumer? A) pike B) perch C) mosquito larvae D) dragonfly larvae

Chromosomal alterations include: deletions and ... ? a.) transfer mutations b.) doubling mutations c.) inversion mutations d.) location mutations

Through the course of evolution, plants have developed smaller gametophytes and larger sporophytes. Study the list of plants. Then, place them in order, from the one with the briefest gametophyte stage to the one with the longest gametophyte stage.

Micah has straight hair. If he is homozygous for the gene that determines straight hair, what is true of his parents?

Explain how the appearance of photosynthetic organisms (bacteria, algae, and plants) changed the Earth's atmosphere.

In the final stage of the oxidation of food molecules, a gradient of protons is formed across the inner mitochondrial membrane, which is normally impermeable to protons.

What is the probability that a colorblind male and a normal female will have a colorblind son?

Wind can transport particles of many different sizes. What sized particles are probably carried the farthest by the wind?

A country that has been relatively poor is starting to become wealthier. This has brought many people into the capital city, causing the population to grow very rapidly.

An inactive gene inherited from an ancestor is an example of which kind of evidence for evolution? A. DNA B. fossil C. anatomical D. radiometric