Which of the below is not an example of an ecosystem service?
a. pollination of crops by native bees
b. revenue generated by clear-cutting of tropical dry forest
c. the presence of an intact forest maintaining constant water flow in streams throughout the dry season in a tropical region
d. rainforest trees removing carbon from the atmosphere

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants, the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.