How do scientists know that the first organisms were simple, unicellular organisms

When a colloid such as gelatin forms, which molecule does the process of protein coagulation entrap?

DNA is always read in the ___ direction

Which statement is true about the thyroid hormones? (1) They increase the rate of metabolism in cells throughout the body. (2) They control how quickly cells use energy. (3) They are not steroid hormones.

Why do some species employ both mitosis and meiosis, whereas other species use only mitosis?

Darwin's theory of evolution offers a scientific explanation for which of the following? A. how genetic information is inherited B. changes in species over time C. human effects on biodiversity D. the age of earth

How does the life cycle of a praying mantis differ from the life cycle of a beetle?

Zygote, gamete, and fertilization are key terms associated with sexual reproduction. identify the definitions and examples of these three key terms

Do Cockroaches Evolve in Response to Living with Humans?

Which of the following might be a pioneer species in an area where there was recently a lava flow? Choose all that apply. Select one or more: grass lichen birds bacteria

What is the name of the highschool in union springs al