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.)
Best Answer: Ribosomes-Site of protein synthesis. Consists of a small subunit and a large subunit. They are found freely floating in the cytosol or attached to the endoplasmic reticulum. They are made up of ribosomal RNA and protein. Rough endoplasmic reticulum (RER) - An extensive network of membranous sacs called cisternae. They outer membrane of the nuclear envelope is continuous with the RER.