What is the cytoplasm? a) a mixture of sugars and starches b) a mixture of organelles and cytosol c) a matrix of proteins and carbohydrates d) a matrix of fibers

Mixtures are very different from compounds. Mixtures can be physically separated into different components and compounds cannot be physically separated. Which of the following is NOT a mixture? A. salt water B. air C. soil D. sugar

Female moths release a type of chemical that attracts males, even from a distance. Which is the name of this chemical substance?

Which of the following has the strongest gravitational pull on the earth? A. moon B. Earths magnetic core C. the atmosphere D. the sun

What class of barrier to gene flow would we be observing if we noted that the offspring of a lion and a tiger (two different species) are awkward, gangly beasts that have poor survival in the wild? a. Premating barrier b. Geographic isolation c.

Bacteria and humans are similar in that they both

Which effect is most likely caused by nondisjunction during meiosis? A. an extra chromosome B. an increase in nuclei C. increased survival benefits from traits D. only two types of nitrogenous bases

A segment of dna that codes for rna and a protein is a

For older adults and previously inactive individuals, exercise intensity should fall closer to what percentage of the maximal heart rate?

Colleen has been advised by her physician to avoid taking high-dose supplements of certain vitamins because they can accumulate to toxic levels in her body. which vitamins?

In 1865, a biologist, St. George Jackson Mivart, constructed an evolutionary tree of existing primate species with many branches based on analysis of spinal columns. But to his dismay, another tree based on limb comparison was quite different.