Dylan is on a strict vegan diet he does not consume meat, fish, eggs or dairy products. Which nutrient is difficult to obtain naturally from a vegan diet.

1. Vitamin A

2. Vitamin B3

3. Vitamin B12

4. Vitamin C

5. Vitamin E

How long ago do scientists believe the continents formed Pangaea?

Describe the biological classification system designed by carlos linnaeus, particularly how it works. List all the taxonomic levels in order from the broadest to the narrowest that are needed to classify all the organisms on earth today.

What takes place during transcription? A) Proteins are made from RNA. B) DNA is made from RNA. C) DNA is made from DNA. D) RNA is made from DNA.

A series of enzymes catalyze the reaction X→Y→Z→A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme.

Carbohydrate is considered the most essential nutrient. a. True b. False

How is a person with a body mass index of 31.2 classified? underweight normal weight overweight obese?

How is a blood pressure reading affected if a wide adult cuff is used on a small child? blood pressure readings will be higher?

Why are the structure and function of the pont du gard described as "marks of roman civilization"?

Make a statement of hybrid cars

Which of the following statements is most accurate? A. Warm air sinks. B. Warm air is less dense than cold air. C. Warm air is denser than cold air. D. Warm air exerts more pressure on the land than cold air.