When comparing the hearts of Amphibians, Reptiles, and Mammals, what is the one feature that occurs in Amphibians and Reptiles that does not happen in Mammals, thereby making mammalian circulatory systems the most efficient of the three.

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

-hails tea

explanation:

-t poses

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.

your answer would be a, maximum exploitation of resources.