Which of the following statement about the simi... - JAMB Biology 2019 Question
Which of the following statement about the similarities in plant and animal transport is correct?
A
Materials and hormones are transported in fluid form
B
The transport medium is made up of only tissues
C
Their materials are transported in the same vessels
D
Diffusion is not required
correct option: a
Both animals and plants have more than one type of tissue which is specialised to make transport an efficient process. The vessels and tracheids in xylem are made up of dead, lignified cells. Phloem tubes are living, as are all the mammalian transport cells and tissues.
Plant Transport System
- Plant takes in water & dissolved nutrients from soil via roots. These substances are carried into specialized tissues in plant stem that act as route for water & nutrients to be carried to various parts of plant.
- Xylem is specialized plant tissue. It is responsible for carrying water & dissolved minerals taken in from roots. Individual cylindrical vessels connected together make up xylem.
- Structure responsible for translocation is phloem. It is made up of cells that control passage of food in form of sugars from leaves into different parts of plant. Phloem is positioned just outside xylem.
Animals' Circulatory System
- Oxygen is needed by animal body for various cellular processes & activities. Animal's circulatory system is main transport system in body.
- Animal's circulatory system consists of heart, blood vessels -- arteries, veins & capillaries -- & blood.
- Heart is pump that pushes blood to move along arteries & veins. Blood from heart & lungs passes thru arteries & carries with it oxygen & nutrients to be distributed into many organs & cells via capillaries.
- Blood goes into veins & takes waste products, like carbon dioxide & other chemical wastes, to be eliminated via organs responsible for proper waste excretion.
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