Some cells produce and secrete high levels of digestive proteins. Which organelles would you expect to be abundant in those cells? A) Nuclei and vacuoles
B) Rough ER and ribosomes
C) Lysosomes and ribosomes
D) Mitochondria and chloroplasts

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.

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