IB DP Biology: HL复习笔记9.3.1 Plant Growth
Plant Growth Plant growth occurs in regions known as meristems The cells in these regions are known as meristem cells Meristem cells are undifferentiated; they actively divide by mitosis to produce...
IB DP Biology: HL复习笔记9.2.5 Skills: Measuring Phloem Transport Rates
Measuring Phloem Transport Rates Hemiptera (also known as true bugs) is an order of insects that have highly-adapted mouthparts for piercing and sucking Many hemipterans (such as aphids) use these ...
IB DP Biology: HL复习笔记9.2.4 Skills: Identifying Xylem & Phloem
Identifying Xylem & Phloem Xylem The functions of xylem tissue in a plant are: To transport dissolved minerals and water up the plant via vascular tissues Structural support Xylem tissue is fo...
IB DP Biology: HL复习笔记9.2.3 Hydrostatic Pressure Gradients
Hydrostatic Pressure Gradients Phloem sap containing sucrose and other organic solutes moves through the sieve tubes down a hydrostatic pressure gradient This is known as the pressure-flow hypothes...
IB DP Biology: HL复习笔记9.2.2 Sucrose Loading
Sucrose Loading Mechanism Organic compounds such as sucrose are transported from source to sink through the phloem sieve tubes Sucrose is a disaccharide formed from a molecule of glucose and a mole...
IB DP Biology: HL复习笔记9.2.1 Translocation in Plants
Translocation Translocation is the biological term used to describe the transport of organic solutes in the phloem tissue The liquid that is being transported within the phloem can be referred to a...
IB DP Biology: HL复习笔记9.1.6 Skills: Experiments Investigating the Rate of Transpiration
Practical 7: Potometers & the Rate of Transpiration The effect of environmental factors on the rate of transpiration in plants can be measured using a piece of equipment called a potometer Note...
IB DP Biology: HL复习笔记9.1.5 Skills: Drawing Xylem Vessels
Drawing Xylem Vessels The internal structure of plants can be examined by taking transverse sections of different parts of a plant, including the leaves, stem and roots Note that cross sections can...
IB DP Biology: HL复习笔记9.1.4 Adaptations of Xerophytes
Adaptations of Xerophytes Plants that live in conditions with a plentiful supply of fresh water have leaves with a short diffusion distance through to the stomata and a large surface area provided ...
