How do lichens prepare bare rock to support the growth of plants? A: They use nitrogen from the air to make nutrients that plants can use.

B: They add nutrients to the rock and have roots that hold the rock together.

C: They replace smaller trees and shrubs that can’t get enough sunlight.

D: They release acids that help break down the rock to form soil

What is the sequence of amino acids corresponds with the rna strand ucg ggg cac

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

What is the ecological role of food chains and food webs