Which of the following is a chemical (as opposed to, say, a fiber or cell)? Question 3 options: sarcomere neurotransmitter motor neuron myofibril

The ancestors of plants that lived in water had plenty of water for the young. angiosperms are a group of land plants that evolved a reproductive trait for living on land. this trait protect young plants by allowing them to grow only when water is present and the conditions for healthy development are right. what trait most likely young angiosperms in this way?

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger