15. The first known bird fossils date to which era of time?

A. Permian

OB. Triassic

O C. Jurassic

O D. Cambrian

Why is a seed vault for the world important. 4 reasons why.

Does crossing over happen in meiosis

Distinguish between growth and development

Write a hypothesis that relates the independent variable of temperature to the dependent variable of number of flowers on a plant. Not too long; quick

What things make studying people difficult

Find the common radio of the sequence. - 4,8,-16,32,

Grandpa Sam used to tell his grandkids how he first laid eyes on Grandma Sylvia. "When I was courting your granny, I was dazzled by her beautiful, LONG eyelashes. What a looker she was." "Yes, and a handsome man he was too," said Grandma Sylvia.

Jim is categorized as poor. Thus Jim's daily income must be less than how much dollars? Jim must be earning less than dollars per day.

Why does blood pressure decrease as the blood travels from arteriesto arterioles to capillaries?

Kangaroos that nurse their young in a pouch are what type of mammal? monotreme marsupial placental mammal