Explain why 2 brothers may look very different if they have the same parents. Be sure to write in complete sentences and use the term "crossing over".

Characteristics of parasitic nematodes and give us an example of infective eggs

The table below shows the number of foot bones in some horse fossils. Horse Fossil Record Horse Fossil Number of Foot Bones P 19 Q 17 R 24 S 13 Ancient horses had more bones in their foot then present-day horses.

Damage to the pyloric sphincter might result in which of the following conditions? Select one: a. Poor absorption of nutrients by the large intestine b. Acid reflux resulting in painful heartburn c. An inability to control urination d.

Sexual dimorphism a. refers to differences between the sexes with regard to features such as body size b. refers to differences between adults and adolescents with regard to sexual behavior c. is particularly pronounced in all primate species d.

Plants contain xylem and phloem tissue. what organ system in animals performs a similar function as the xylem and phloem of plants?

If a space in the structure is filled with minerals and then the original animal or plant part dissolves it called

What s the most direct way to differentiate between types of epithlial tissue

In nature, organisms mate without human interference. This is called A) artificial selection. B) selective breeding. C) non-random mating. D) random mating. my answar is B

When trees transpire, releasing gaseous water into the atmosphere, they can absorb heat from their environment and cool it down. What property of water is responsible for this activity? A) High heat capacity B) High heat of vaporization C) Adhesion

How do fronts change weather?