Which enzyme unwinds and separates the two strands of the DNA double helix?

helicase

sucrose

cellulose

Both the nail plate and the hair is composed of keratin. a. True b. False

Churchhill use the term Iron Curtain to describe?

Cells can grow from unspecialized cells into specialized cells by the process of

The kinetic energy of the falling water is converted to

Which of the following does NOT cause the release of a hormone from an endocrine organ?*Somatic motor neuron stimulation * Levels of circulating ions * Another hormone * Neural reflex arc

Although gender is not inherent in inanimate objects or in behaviors, we treat many objects and behaviors as if they were masculine or feminine. This cognitive organization of the world according to gender is referred to as?

Water changes temperature easily. true or false

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.