Answer: The advantages of spines in these unrelated organisms are as follows:
- for escape and defence
- for regulations of body temperature
- for conservation of water
Explanation:
The evolution of spines in Tenrecs, echidnas and hedgehogs represent STRUCTURAL ADAPTATION i.e when a part of the body of a living organism undergoes changes to become structurally adapted to its mode of life.
- The evolved spines in hedgehogs are for physical defence
- in tenrecs, they are for physical defense
Answer: creating an ozone layer to shield life from UV rays
Cynobacteria or blue green algae is the strain of bacteria, which was able to produce oxygen in the primitive earth as a result of photosynthesis. The abundance of oxygen in the atmosphere formed the ozone layer in the upper atmospheric layers, these layers are protective enough to provide a shield against the harmful UV radiations incident on earth coming from the sun.
A common cause of iron deficiency anemia in adult hood is
blood loss and lack of iron in the body. Blood loss is usually the cause
because of bleeding in the GI tract, intestinal bleeding and chronic occult
bleeding. Lack of iron in the body is also a cause because a body is in need of
iron and if it does not exceed the required iron in the body, it may result to
iron deficiency.
Answer:
The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.
Explanation:
