Which one of these is one of the only two animals that lay eggs?

A) wombat

B) duck-billed platypus

C) three-toed sloth

D) chicken

The particles that make up a rock are constantly in motion. However, a rock does not visibly vibrate. Why do you think this is? (science they didn't have it as a subject)

Juan inflates a balloon and then releases its end to let the balloon go free as air comes out. The balloon then flies around the room.

In a particular area where the annual death rate is 35 per 1000 individuals and the annual birth rate is 15, population growth would be

A sequence of amino acids called a? And is produced during the process of? During this process, the? of a tRNA molecule binds to a codon of mRNA

You are hurrying to finish that science fair project and ... oops, a splinter from your display ends up in your hand. you pull it out, but later that night your finger becomes swollen and red.

A hormone that increases heart rate, blood pressure, and blood sugar levels in times of emergency is

What is the meaning of the word "thermal" in this sentence? all boys coming on the school camping trip need to bring a pair of long thermal underwear because it is going to be very cold this weekend.

If an animal had 44 chromosomes in its sex cells, how many chromosomes total will they have?

Which system regulates and controls growth, development, metabolism, and reproduction? 1. endocrine system 2. lymphatic system 3. integumentary system 4. skeletal system

In photosynthesis what do the chloroplasts convert the energy of sunlight into?