Climate Zones Objectives: 1. Describe Earth's major climate zones. 2. Explain how climate zones are characterized. Notes: According to the three cell convection model of each hemisphere the Earth neatly separates itself into three distinct climate zones; the polar, temperate, and the tropical zones.limate Zones Objectives: 1. Describe Earth's major climate zones. 2. Explain how climate zones are characterized. Notes: According to the three cell convection model of each hemisphere the Earth neatly separates itself into three distinct climate zones; the polar, temperate, and the tropical zones.
The nucleus is a large roundish organelle. It is bounded by a double membrane which has numerous pores. Inside the nucleus are chromosomes and a dark region called a nucleolus which makes ribosomes. (Ribosomes are necessary for protein synthesis.)
The 70 S and 80S ribosomes help in protein sythesis. 1. Ribosomes are bound to the endoplasmic reticulum, creating rough endoplasmic reticulum in eukaryotes, while in prokaryotes ribosomes are distributed in the matrix of cell. 2. Both types of ribosomes are the sites of protein synthesis. 3. They are of two types. The two types of ribosomes are 70S and 80S found in the cells of prokaryotic and eukaryotic cells, respectively. Thank.