3.1
What is transpiration?
Transpiration is the process in which water is pulled up through xylem and lost from leaves as it escapes through open stomata.
What is a tropism?
A tropism is the growth response of a plant toward (positive) or away (negative) from a stimulus.
Tell the main difference between native and exotic species
Native species are native to the area, exotic species are not native, and are brought to the area.
What is the Calvin cycle?
The Calvin cycle is the dark reaction process that fixes carbon dioxide and uses ATP and NADPH to make PGAL.
What is bursting dispersal?
Bursting dispersal is the seed spreading method where a plant’s fruit suddenly splits open to release seeds.
3 factors that contribute to habitat loss
Urban development, fire, agriculture, logging, pollution
What is the cork cambium?
The cork cambium is the layer of cells outside the phloem that produces cork tissue for protection.
What is auxin?
Auxin is the plant hormone responsible for directing growth by promoting cell elongation, controlling responses to light and gravity, and influencing root development.
2 ways to control invasive species
Mechanical - pulled from ground by hand or machine, chemical - plant killers, biological - natural way of control.
What is the vascular cambium?
The vascular cambium is the growth layer between xylem and phloem that produces new xylem and phloem.
What is heliotropism?
Heliotropism is the growth or movement of a plant in response to sunlight.
3 reasons why we should control pollution in habitats
Disrupts balance of nature, food, kills plants - leads to extinction, moral reason.
What is NADPH?
NADPH is the energy carrier used in the Calvin cycle.
What are phototropins?
Phototropins are light-sensitive proteins in plants that detect blue light and initiate responses like bending stems or leaves toward light, opening stomata, and optimizing photosynthesis. They act as the plant’s “light sensors” to guide growth and orientation.
About how many plant species exist on Earth today, and what percent of those are threatened of extinction?
300,000, %68