Get premium membership and access questions with answers, video lessons as well as revision papers.
The blood in your veins appears blue because you are looking at your veins through layers of skin and fat
Skin scatters a lot of the red portion of white light before it can reflect off the blood, leaving the blue light to reflect off the blood and back to our eyes. It is a similar effect to how the white sun appears red at sunset due to the blue colors being scattered away by the atmosphere.
Daniel33 answered the question on March 21, 2022 at 09:25
- Discuss the structure and functions of the various muscle tissues found in humans(Solved)
Discuss the structure and functions of the various muscle tissues found in humans
Date posted: May 13, 2021. Answers (1)
- Describe the causes and effects of chromosomal mutations(Solved)
Describe the causes and effects of chromosomal mutations
Date posted: May 13, 2021. Answers (1)
- Give two causes of mutations(Solved)
Give two causes of mutations
Date posted: May 13, 2021. Answers (1)
- Distinguish between mutations, mutants and mutagens(Solved)
Distinguish between mutations, mutants and mutagens
Date posted: May 13, 2021. Answers (1)
- Discuss the various mechanisms that hinder self-pollination and self fertilization in plants(Solved)
Discuss the various mechanisms that hinder self-pollination and self fertilization in plants
Date posted: May 13, 2021. Answers (1)
- Outline five measures that can be employed to prevent and control the spread of the parasite(Solved)
Outline five measures that can be employed to prevent and control the spread of the parasite
Date posted: May 13, 2021. Answers (1)
- Describe the adaptations of Schistosoma spp to their parasitic mode of life(Solved)
Describe the adaptations of Schistosoma spp to their parasitic mode of life
Date posted: May 13, 2021. Answers (1)
- Describe five types of symbiotic relationships in a natural ecosystem(Solved)
Describe five types of symbiotic relationships in a natural ecosystem
Date posted: May 13, 2021. Answers (1)
- Discuss the various ways employed by preys to avoid the predators(Solved)
Discuss the various ways employed by preys to avoid the predators
Date posted: May 13, 2021. Answers (1)
- Discuss how the various tropisms adapt plants to their habitats(Solved)
Discuss how the various tropisms adapt plants to their habitats
Date posted: May 13, 2021. Answers (1)
- Outline the activities that occur in the body when one touches a hot object(Solved)
Outline the activities that occur in the body when one touches a hot object
Date posted: May 13, 2021. Answers (1)
- Explain how bony fish are adapted to their habitats(Solved)
Explain how bony fish are adapted to their habitats
Date posted: May 13, 2021. Answers (1)
- Why is locomotion necessary in higher animals?(Solved)
Why is locomotion necessary in higher animals?
Date posted: May 13, 2021. Answers (1)
- Discuss three examples of natural selection in action(Solved)
Discuss three examples of natural selection in action
Date posted: May 13, 2021. Answers (1)
- How is the mammalian gaseous exchange system adapted to its functions?(Solved)
How is the mammalian gaseous exchange system adapted to its functions?
Date posted: May 13, 2021. Answers (1)
- Describe what happens in a flower from the time of pollination up to the time of seed and fruit development(Solved)
Describe what happens in a flower from the time of pollination up to the time of seed and fruit development
Date posted: May 13, 2021. Answers (1)
- Outline the differences between wind and insect pollinated flowers(Solved)
Outline the differences between wind and insect pollinated flowers
Date posted: May 13, 2021. Answers (1)
- How are xerophytes and hydrophytes adapted to their habitats(Solved)
How are xerophytes and hydrophytes adapted to their habitats
Date posted: May 13, 2021. Answers (1)
- Discuss the causes, effects and control measures for water pollution(Solved)
Discuss the causes, effects and control measures for water pollution
Date posted: May 13, 2021. Answers (1)
- Discuss the various ways in which anaerobic respiration is utilized in industries and homes .(Solved)
Discuss the various ways in which anaerobic respiration is utilized in industries and homes .
Date posted: May 13, 2021. Answers (1)