Removal of phloem tissue leads to gradual death of the plant. why does this happen?

a. distribution of carbohydrates from the leaves to the other parts of the plant is affected.

b. distribution of water and nutrients from the roots to the other parts of the plants is affected.

c. distribution of water and nutrients to the flowers affects seed formation

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.