Bio 23-1

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

What does the root system of a plant do?

absorbs water and dissolved nutrients

What help leaves conserve water?

adjustable pores

What is the function of roots?

anchor plants in the ground, prevent erosion, protect the plant from bacteria in the soil, holds plant upright

What type of plant contains vessel elements?

angiosperms

What helps leaves increase the amount of sunlight they absorb?

broad, flat surfaces

What are the primary functions of a stem?

carries nutrients, protects against predators and disease, transports water

What is meristematic tissue?

cells that are not specialized to perform a certain function yet

What are companion cells?

cells that surround sieve tube elements

What is sclerenchyma?

cells with extremely thick, rigid walls that make ground tissue tough and strong

What is collenchyma?

cells with strong, flexible cell walls that support larger plants

What are meristems?

clusters of tissue that are responsible for continuing growth throughout a plant's lifetime

What makes up the strings in celery?

collenchyma

What is the thick waxy coating that protects against water loss and injury?

cuticle

What type of tissue is considered the "skin" of the plant?

dermal tissue

What are the three main tissue systems in a plant?

dermal, vascular, ground

What does the outer covering of a plant consist of?

epidermal cells

What is phloem?

food-conducting tissue

What is parenchyma?

ground tissue with thin cell walls and large central vacuoles surrounded by a thin layer of cytoplasm

What is an apical meristem?

group of undifferentiated cells that divide to produce increased length of stems and roots

What is located on the underside of leaves which regulates water loss and gas exchange?

guard cells

What are both xylem and phloem made up of?

hollow connected cells that carry fluids throughout the plant

What are the plants main photosynthetic systems?

leaves

What are tracheids?

long, narrow cells with walls that are impermeable to water

What is the only type of tissue that produces new cells by mitosis?

meristematic

What connects tracheids?

openings in the walls

What is most ground tissue made up of?

parenchyma

What are sieve tube elements?

phloem cell that is joined end to end

What does indeterminate growth mean?

plants grow and produce new cells at the tips of their roots and stems for as long as they live

What does dermal tissue in roots contain that help water absorption?

root hair cells

What are the principal organs of seed plants?

roots, stems, leaves

What are the main phloem cells?

sieve tube elements

What specialized cells are located in phloem?

sieve tube elements and companion cells

How are vessel elements situated in a plant?

stacked so that water can travel through them

What carries the products of photosynthesis from the leaves back down to the roots?

stem

What is considered to be a plants support system?

stem

What is differentiation?

the process by which cells differentiate and are assigned certain functions

What happens when tracheids mature?

they die and their cytoplasm disintegrates

What are trichomes?

tiny projections that help protect the leaf

What specialized cells are located in xylem?

tracheids and vessel elements

What functions do roots, stems, and leaves perform?

transport nutrients, protection, coordinating plant activities

What type of tissue is considered to be the "bloodstream" of the plant?

vascular tissue

What is xylem?

water-conducting tissue

What are the principal subsystems in vascular tissue?

xylem and phloem


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