Which of the following in NOT a characteristic of eukaryotic cells? DNA is separated from the cytoplasm by a nuclear membrane
Lack membrane-bound organelles
Complex
Large

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.