One hypothesis about the origin of the building blocks for life is that they werea. made inside meteors.

b. formed when lightning struck water.

c. started by the rna in the ocean.

d. brought to earth by meteorites.

What do Tylenol do in plants

Thymine and cytosine differ from adenine and guanine in that

Which do insulin and glucagon have in common

The rainshadow effect causes A. natural desert formation B. Desertification C. Leaching of soil D. Increased precipitation

2. When water reaches a certain temperature, it will freeze. In a pond or lake, will the water freeze all the way to the bottom? Explain how this occurs or does not occur and why it is important to the organisms that live in the water.

Where do you think trees get there nutrients they need to grow

Which characteristic is true of organic fertilizers? balanced caustic slow acting soluble

Tetralogy of fallot is a congenital condition of the heart that manifests in four distinct anomalies of the infant heart.

A veterinarian thinks that a dog has swallowed a key ring. Which types of electromagnetic waves is the doctor most likely to use to check the dog? u O gamma rays microwaves radio waves O X-rays

The new cell formed by the union of the spermatozoon and the ovum is the: