biology 1

anandhakrishnan ea · 17問 · 1年前

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Plantae classified into two what are they

cryptogammae and phanerogamme

What is cryptogamme

plants which they do not have flowers or seeds

What is phanerogammae

plants which has flowers and seeds are called phanerogammae

Cryptogammae are classified into 3 what are they

thallophyta, brayophyta, pteridophyta

What is thallophyta

largest group in plant kindom

Example for thallophyta

algea and lichen

3 points about algea

they are autotropic contain chlorophyll study of algae are called phycology

Study of fungi is called

mycology

Rhodophyceae group members are commonly called

red algea

Metal used for control algea are called

copper

What is bryophyta plants

its is the first group of land plants no xylem, phloem, true roots, stem and leaves its is the amphibian catagory of plant kingdom example :- mosses

Amphibian catagory of of plant kindom is

bryophyta

Example for pteridophyta

ferns, azolla, marsilea

Reproduction of ferns through

spores

Thallophyta യിൽ നിന്നും bryophyta യിൽ നിന്നും pteridophyta എങ്ങനെ വത്യാസ പെട്ടിരിക്കുന്നു

it has separate leaves stem and root

Phanerogammae are classified into two what are they

gymnosperms angiosperms

Whats in gymnosperms

naked seeds

What is angiosperms

coated seeds

angiosperms are classified into two

monocotyledons dicotyledon

Monocotyledons plant roots are

fibres root

Dicotyledon plant roots are

tap roots

Two type of venation on plant leaves

parallel venation reticulate venation

Parallel venation present in which type

monocotyledons

Venation present in dicotyledon plans

reticulate venation

Study of different parts of plant is called

morphology

Roots are developed from

radicle

Stems are developed from

plumule

3 type of roots

tap root fibrous root adventitous root

2 points about plant stem

stems are developed from plumule they are phototropic

4 plant stem modifications

tuber - potato bulb - onion, garlic corm colocasia rhizome - turmeric ginger

Cactus spines are developed from

leaves

Reproductive part of plant or tree is

flower

What is inflorescence

ath arrangement of flowers in a floral axis

The arragement of flowers in the floral axis is called

inflorescence

Male sex orgen in flower

androecium

Female sex organ in flower

gynoecium

What is androecium

anther + filament is called

Another name of androecium

stamen

Where is pollen grains are seen

anther

Advantitious roots are seen on mangrove

pneumatophores

Another name of gynoecium

carpel

What is carpel

combination of stigma style ovary is called

What is pollination

transfer of pollen grains from stigma to overy is called pollination

What are 2 type of pollination

self pollination cross pollination

3 stages of reproduction process in plants

pollination, fertilization, seed dispersal

Wind വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

anemophiy

Water വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

hydrophily

Insects വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

entomophily

Birds വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

ornithophily

Bats വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

chiropterophily

Other vertebrates വഴിയുള്ള പൊള്ളിനേഷൻ അറിയപ്പെടുന്നത്

zoophily

Snail വഴിയുള്ള പോലീനേഷൻ അറിയപ്പെടുന്നത്

malacophily

Ants വഴിയുള്ള പോളിനേഷൻ അറിയപ്പെടുന്നത്

myrmecophily

After fertizilation overy convert to form

fruit

After fertilization ovule convert to form

seed

Nutritive tissue for the gowing embryo in plants

endosperm

The process of Fruit developed from ovary without fertilization is called

asexual reproduction

root, stem, and leaves of some plants grow new plants through process

vegetative propagation / vegetative reproduction

Example for vegetative propagation of plants through leaves

bryophyllum

Development of fruit without fertilization is called

parthenocarpy

Parthenocarpy വഴിയുണ്ടാവുന്ന fruit അറിയപ്പെടുന്നത്

virgin fruit

Parthenocarpy വഴിയുണ്ടാവുന്ന fruit ന്റെ പ്രത്യേകത

seed less

Plant growth hormones

auxins cytokinins gibberellins

Plant growth inhibitors hormones

ethylene abscissic acid

Auxin hormone is discovered by

charles darwin

Plant bend towards light due do ( hormone name )

auxin

Auxin hormone cconcentration on plants

concentration high at top and low at bottom

Chemically auxin

IAA ( indole 3 acetic acid ) IBA ( indole butyric acid )

First discovered plant hormone

auxin

Functions of cytokinin hormone

helps in rapid cell division.. cytokinins helps to increase mitosis activity

Hormone that help break seed dormancy

gibberlin

Abscisic acid ന്റെ purpose എന്താണ്

seed dormancy

Plant hormone that exsist in gaseous state

ethylene

Plant hormone that help for ripening of fruit

ethylene

Gas used for artificial ripening

enthylene

Chemical used for artifical ripening of fruit

calcium carbide

Hormone that produced in injured plant

traumatin

Hormone that helps in flowering of plants

florigens

Plant tissue are classified into two

meristematic, permanent

Meristematic plant tissue classified into 3 whats are they

apical, intercalary, lateral,

What is the purpose of apical meristem

it is found in tip of the plant. the purpose is used to increae length of the plant

What is lateral meristem?

it is found in the sides of the plant. to increase width of the plant

What is the purpose of intercalary meristem?

it help to the stem enlongation in plants

Permanent plant tissue are classified into two

simple and complex

Simple plant tissue are classified into 3 what are they

parenchyma, collenchyma, sclerenchyma

Complex plant tissue are classified into two

xylem and pholem

What is parenchyma

this tissue is used to build soft part in plant. help in photosynthesis and food storage

Tissue that offer flexibility with the structural framework and mechanical support in plants

collenchyma

Tissue that seen in dead cells

sclerenchyma

Plant tissue that seen in covering of seeds and nuts

sclerenchyma

Sclerenchyma walls are thickened due to

lignin

Collenchya tissues are thickened at the corners with

cellulose and pectin

What is the purpose of xylem

it is a vessel that conduct water and mineral from root to stem and leaves

What is the purpose of phloem

conduct food prepared by leaves to different parts of the plant

Gaseous exchange in plants takes place through

stomata

Stomata found in

under the leaf

What is transpiration

process of escape of water from leaf to the atmosphere in the form of water vapour through stomata

Plants get water through roots is called

capillarity

The process of get rid of excess water in the plants

transpiration

100

Purpose of guard cell

regulate the rate of transpiration by opening and closing the stomata

dates

dates

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