class 7 cells

cell

the basic structural and function unit of all organism

nucleus

The control center of the cell that contains genetic material (DNA)

cell wall

A rigid layer outside the cell membrane in plant cells that provides support and protection

Cytoplasm

The jelly-like substance inside the cell where organelles are suspended

Chloroplast

Organelles in plant cells that carry out photosynthesis

Lichens

a combination of fungi and algae living together in a symbiotic relationship

Guard cells

are specialized cells that surround the stomata (pores) on leaves and control their opening and closing to regulate gas exchange and water loss

chlorophyll

is the green pigment in plants that helps them absorb sunlight for photosynthesis

vessels

are tube-like structures in plants that help transport water and minerals from roots to other parts of the plant

Symbiosis

is a close and long-term relationship between two different organisms where at least one benefits

autotrophic

organisms can make their own food using sunlight or chemicals, like plants through photosynthesis

stomata

are tiny pores on the surface of leaves that allow gases (like oxygen and carbon dioxide) and water vapor to pass in and out

rhizobium

is a type of bacteria that lives in the roots of leguminous plants and helps fix nitrogen from the air into the soil

saprotrophic nutrition

is the way some organisms, like fungi and bacteria, feed by breaking down dead plants and animals

Vacuoles

Storage sacs inside cells that hold water, nutrients, or waste

diffusion

The movement of substances from an area of higher concentration to lower concentration

Mitosis

The process of cell division that results in two identical daughter cells

Organelles

Specialized structures inside a cell that perform specific functions