Answer both please 1. Which of the following organelles controls what enters and exits the cell?
vacuole
mitochondrion
lysosome
cell membrane

DNA is organized into structures called
nuclei
chromosomes
microtubules
thylakoid stacks

How does pregnancy begin? a) a placenta forms in the uterus b) a sperm reaches an egg in the fallopian tubec) the blastocyst differentiates into two cell types d) contractions begin in the uterine wallapex

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water