What are sudden large declines in biodiversity in the fossil record called?

Male peacocks have tail feathers that make up 60% of their body length. During the mating season they fan their tails and shake these feathers in front of females. Females evaluate the tail-shaking behavior as part of selecting their mate.

DNA undergoes the process of replication to produce new strands of identical DNA before cell divisions. Describe the basic process of DNA replication.

Where does gas exchange occur? A. trachea B. bronchus C. bronchioles D. alveoli

Which of these physical factors most shapes the characteristics of a ecosystem? A) soil type B) longitude C) temperature and rainfall D) air circulation patterns

What is a homologous pair of chromosomes?

Garbage collectors or environmental engineers. true or false

Try to think of other things that are hybrids

How do energy conversions make a car go down the street? A. The stored energy of the gasoline is converted to heat, and then to the stored energy of the car. B.

Describe how a flu vaccine the human body?

Adults do not need foods from the dairy group, only growing children and athletes do.