A type of trilobite is used as an index fossil these fossils were made about 540 million years ago a scientist finds a trilobite fossils in layer 5 apex

Which of these must occur during S phase of the cell cycle so that two daughter cells can be produced during M phase? A-The DNA must be replicated. B-The chromosomes must be joined. C-The cytoplasm must be separated.

Which of the following is common to both eukaryotic and prokaryotic cells? A-Nucleus B-Nucleolus C-Plasma membrane

Which would be a result of a malfunctioning excretory system? a. paralysis b. memory loss c. toxic buildup d. difficulty breathing

Janie is a 3-month-old infant participating in an experiment. She's lying in her crib with one end of a ribbon tied to her foot and the other end tied to a mobile dangling over her crib.

Which cycle includes bacteria taking gas from the atmosphere and converting it into a material that plants can absorb through root systems? A. The phosphate cycle B. The water cycle C. The nitrogen cycle D. The oxygen and carbon dioxide cycle

A restriction enzyme is that complete the sentence

Types of volcanic mountains in terms of shape, type of eruption, and the minerals that make up the volcano

Australopithecines were the ancestors of monkeys. A. True B. False

A mutation that causes a human have 11 toes is (neutral, harmful, or beneficial.)

Cells of a fungus and an animal