Breaking down of rocks and change in their chemical composition is called chemical weathering. It occurs when the unstable mineral present in the rocks react with water, gases in the air to produce some other minerals. The process of chemical weathering is more effective in a warm and humid climate as these conditions favor the chemical reactions to occur. Dry and cold climate slows down the chemical reactions and thereby, does not favor the process of chemical weathering.
Why would a plant cell have a chloroplast while an animal cell wouldn't? Chloroplasts are used to make food through photosynthesis. Plant cells make their own food, while animals do not.
Ectopic pregnancy can cause the burst of fallopian tube. If previous ectopic pregnancy occured then again onset of this type of pregnancy may lead to life threatening bleeding. Having the abdominal surgery before may also proved as a risk.
