What is bound to the heme in the hemoglobin molecule, making it possible to transport oxygen?

Considering that millions of species have lived on earth why are there relatively few fossils

Which of the classes of RNA molecules is associated with the large and small subunits of a ribosome and assists in forming proteins by "holding" the messenger RNA molecule in the ribosome?

What element is found in proteins but not in carbohydrates and lipids?

Every time energy is transferred in an ecosystem, potential energy is lost. A) as heat. B) due to weather. C) because some animals die. D) when it is recycled back to producers.

Which type of memory has an essentially unlimited storage capacity?

redwoods are the tallest species of tree in the world. explain how transpiration causes water to travel from the roots to the branches of a tree this size.

During photosynthesis, chloroplasts use light energy to convert carbon dioxide and water into sugar and oxygen. Which term best classifies the energy stored in the products of photosynthesis?

What did Chargaff discover while studying bases in the DNA of organisms? The bases in the DNA of each organism were unique. The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.

What is one way a plane can form?

Where does diffusion take place