A family has two male children one brother has a straight thumb a straight thumb while the other brother has a bent thumb what causes this difference

Neurofibromatosis, a genetic disease caused by mutation on the NF1 gene, follows an autosomal dominant pattern of inheritance. The diagram shows that the father carries two copies of the defective gene and the mother is unaffected.

3. Which describes starches and sugars? proteins enzymes lipids carbohydrates

Dr. Haxton says the o-o bond is polar and the c-c bond is nonpolar. A good student would say ...

If the osmotic pressure of the blood were increased above normal levels, it means that

A plant cell cannot produce enough energy which organelle is not to blame

1. Suppose that xylem were located only in the roots and stems of a plant. Would fluids in the xylem still move? Explain.

What activity will decrease body temperature? Sweating Exercising Adding clothing Shivering

Organisms with true radial symmetry A. tend to be highly mobile. B. do not have a distinct head region and tend to be sedentary or passive drifters. C. can be divided into two matching halves along only one plane. D.

1. The Earth's carbon cycle consists of the flow, cycling, and recycling of all of the carbon on the Earth. Every living organism's composition includes the element carbon. How does carbon become part of living organisms?

Which of these is used to find the precise age of a rock? Index fossils Radioactive dating Relative dating Stratified rock layers