What is meant by recombinant DNA. Explain how this technology is useful. Give specific example and supporting evidence. No links please

Plz ! ive been stuck on this forever

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.