Which of these is not a structure found in prokaryotic cells? A. a defined nucleus B. ribosomes C. cytoplasm D. cell membrane

How many universes are scientifically proven to exist? A) 0 B) 1 C) billions D) infinite

Which fish has a skeleton made of bone?

What would happen to an enzyme if the temperature and pH changed significantly beyond the enzyme's optimum level?

What contributes most significantly to the kidney's high energy expenditure?

What does dna rna and starch all have in common

An element's atomic number is 49. How many electrons would an atom of this element have?

Which is the ability of a cell membrane to allow materials to pass through it called

The brain and spinal cord are formed from a. the notochord, which forms from endoderm b. the neural tube, which forms from mesoderm c. the neural tube, which forms from ectoderm d. the notochord, which forms from mesoderm

Missy spencer was given penicillin for tonsillitis. she developed a severe life-threatening allergic (hypersensitivity) reaction to the penicillin. her medical file records this reaction as a (n) :

What situation most likely explains the occasional high frequency of certain inherited disorders among human populations established by a small population?