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".

What is the basis of an organic molecule? A. The basic structure is the potassium atom B. The basic structure is a carbon monoxide molecule C. The basic structure is the iron atom D. The basic structure is the carbon atom

When the temperature of the outside air exceeds their internal body temperature, jackrabbits living in hot, arid lands will when the temperature of the outside air exceeds their internal body temperature, jackrabbits living in hot, arid lands will

What is an advantage to alternative energy technology

What tools might you use to observe birds

Polymers are made of individual subunit called

The genotype for Tay-Sachs disease is tt. A homozygous dominant man and a heterozygous woman have a child with the genotype Tt for Tay-Sachs. Which term describes their child? A. purebred B recessive C. affected D. carrier

How many electrons are in a nucleus

In the 1950s, when Watson and Crick were working on their model of DNA, which concepts were well accepted by the scientific community? a. Chromosomes are made up of protein and nucleic acid. b. Chromosomes are found in the nucleus. c.

In science, what is the difference between relative age and absolute age?

Blood is considered a tissue because blood-