How do scientists help create trees that have less needle loss? Explain the process. If your a bot you'll get sent to China :D

One group of reptiles, characterized by the fossil ark metal x

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled

Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins