The diagrams below show models of the circulatory systems of a fish and a frog. A student compared these diagrams. The student found that each of these organisms had a heart to pump blood. Which statement is supported by the student's findings?

1. Some organisms are composed of one cell, which others are multicellular.
2. Many multi-cellular animals have similar organs and specialized systems.
3. The circulatory system in most organisms removes solid wastes from their bodies.
4. All animals have identical circulatory systems.

correct answer is a. and d.

the answer is :

answer: grassland biomes are closer to the equator and receive more rain.

grasslands are biomes that are dominated by grasses rather shrubs and trees. savanna are biomes that exhibit grasses, shrubs and small tree as vegetation. grasslands are located near the equator of the earth. these are found in north america. savanna biomes are found in africa, south america, australia and india. grassland exhibit moderate climatic conditions, it receives   amount of rainfall higher than savanna.   therefore, savanna exhibit dry and hot climatic conditions.

69 is the correct math for the amino acids