Nêu cơ sở khoa học của phương pháp hà hơi thổi ngạt và ấn lồng ngực

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Plz quick a natural resource that is replaceable through a cycle in nature or sustainable practice is called a? the subject is science