At which PH is pepsin most active?

During an enzyme reaction what happens to the substrate

A scientist found fossils of trilobites in a field. Trilobites are now extinct, but lived in water when they were alive. What can the scientist conclude about the field where the fossils were found?

Before a cranberry can make it to your dinner plate, it must pass a bouncing test which rates its quality.

Which of the following sentences is the best example of a hypothesis a. UV radiation does not cause skin cancer. b. chickens lay more eggs when they are happy. c. why does the earth orbit around the sun? d. how many types of organisms are there?

What is the name given to the first species that colonizes new land? A. pioneer species B. first stage species C. climax species

Is there more lymphoid tissue in adults than in children?

Which is true regarding all X-linked disorders? Group of answer choices they result in a longer lifespan they are caused by mutations of the X chromosome they are linked to an unknown chromosome they are disorders that affect only women

I need an example of 2 plants, 1 plant that reproduces sexually, and 1 plant that reproduces asexually and step by step description of both processes.

What food web/chain does red-headed woodpecker belongs in?

List and describe at least four different types of luster that minerals may display.