Biology With Yousaf Ali

25/05/2025

25/11/2024

Gymnosperms

✓✓Gymnosperms are xerophytic in nature.

✓✓Largest tree is the Sequoia giganteae (Redwood tree) is the gymnosperm.

✓✓Ginkgo ,Cycas and Metasequia are called as Living fossils.

✓✓Gymnosperms are fruitless Phanerogams.

✓✓Mostly Dimorphic leaves (Foliage and scally) in gymnosperms.

✓✓Xylem vessels and Companion cells are ABSENT.

✓✓Lateral veins are ABSENT in leaves and their function is performed by .... Transfusion tissues.

✓✓Gymnosperms are HETEROSPOROUS

✓✓ Agregate of the sporophylls (micro and megasporophylls ) make STROBILUS.

✓✓Cones are usually Monosporangiate.

✓✓All the Gymnosperm are Wind pollinated.

✓✓ Fertilization is SIPHONOGAMATIC ( by pollen tube ) and POROGAMOUS (Pollen grains enter through Microphyle ).

✓✓Male gamates in gymnosperms are Motile except in Cycas and Ginkgo.

✓✓ Anthridia are not produced in Gymnosperms.

✓✓ Archeogonia are found in Endosperm.

✓✓ Endosperm in Gymnosperms is HAPLOID and develop before Fertilization in the Nucellus of the ovule from the functional megaspores.

✓✓ Gametophyte generation is highly Reduced which is represented by Pollen grains and Endosperm.

18/11/2024

Plants hormones

18/11/2024

Trick: Aunt Eats Cake Greedly at Sunsets.

1. Aunt = Auxins
2. Eats = Ethylene
3. Cake = Cytokinin
4. Greedly = Gibberellins
5. At = Abscisic Acid
6. Sunset = salic Acid.🌶️

23/05/2024

اطلاع عام
15 جولائی سے 15 ستمبر تک مِیل اور فی مِیل سانپوں کے ملاپ ے مہینے ہوتے ہیں، اور سانپوں کی تقریباً تمام اقسام ہی اِن مہینوں میں اپنے سامنے آنے والی کسی بھی انسان، جانور پر حملہ کر دیتی ہیں، ان دو ماہ میں شام سے لیکر اگلے روز صبح تک سانپ باہر نکلتے ہیں، سانپ زیادہ تر نمی والی جگہ یا ایسی جگہ جہاں پانی کھڑا ہو اُسکے کنارے پر موجود ہوتے ہیں، گاؤں کے لوگ ان دو ماہ میں خاص احتیاط کریں، رات کے وقت ٹارچ اپنے ہاتھ میں رکھیں اور نظریں زمین پر رکھیں
یاد رکھیں ان دو ماہ میں سانپ انسانوں پر باقاعدہ حملہ آور ہوتے ہیں لہٰذا خود بھی احتیاط کریں اور اپنے بچوں کا خاص خیال رکھیں، رات کو ہر صورت بچوں کو زمین پر نہ کھیلنے دیں.

01/07/2023

Other NAMES of Different ORGANELLES🌺*

*🔴 MITOCHONDRIA*

▪️Power house of cell
▪️Electric house of cell
▪️Cellular furnace
▪️ATP mill
▪️Endosymbiont of cell
▪️Cell within cell
▪️Semi autonomous cell organelle.
▪️Prokaryotic cell within eukaryotic cell

*🔴CHLOROPLAST*

▪️Kitchen of cell
▪️Photosynthetic apparatus
▪️Autoplast
▪️Semi autonomous cell organelle.

*🔴 NUCLEUS*

▪️Control center of cell
▪️Brain of cell
▪️Director of cell
▪️Apparatus of heredity
▪️Autonomous cell organelle.

*🔴 ENDOPLASMIC RETICULUM*

▪️Working bench of cell
▪️Pipeline of cell
▪️Endoskeleton of cell
▪️Membrane factory of cell.

*🔴 GOLGI BODIES*

▪️Idiosome
▪️Dalton's complex
▪️Middle man of cell
▪️Dictyosome
▪️Principle director of macromolecular traffic in cell.

*🔴 RIBOSOME*

▪️Palade's particles
▪️Engine of cell
▪️Protein factory of cell
▪️Ribonucleoproteinaceous particle
▪️organelle within organelle
▪️sub cellular organelle.

*🔴 LYSOSOME*

▪️Suicidal bag
▪️Atom bomb
▪️Housekeeper of cell
▪️Disposal units
▪️Scavanger of cell
▪️Polymorphic organelle.

*🔴 VACUOLES*

▪️Storehouse of cell
▪️Repositories of cell.

30/06/2023

*🌏 CELL🌍*
✍1) Cell is derived from
A: Greek
B: Latin ✔
C: Both
D: None
✍2) Cell is derived from cellula which means
A: Room
B: Chamber
C:Apartment
D: All of them ✔
✍3) The Basic unit of life
A: Tissue
B: Cell✔
C: Both
D: None
✍4) which one of the following is control all the activities of life?
A: Organ
B: Tissue
C: Cell ✔
D: All of the above
✍5)Cell was discovered by an English microbiologist Robert hooke
A: 1665✔
B: 1661
C: 1660
D: 1765
✍6) A botanist who proposed the cell- theory was?
A: Schielden✔
B: Shawann
C: Robert Hooke
D: Robert Brown
✍7) A Zoologist who proposed cell-theory was
A: Shawann✔
B: Shielden
C: Robert Hooke
D: Robert Brown
✍8) How many accepted portions of cell- theory
A: 1
B: 2
C: 3
D: 4✔
✍9) Shielden was proposed cell- theory in
A: 1838✔
B: 1839
C: 1888
D: 1898
✍10) Shawann was proposed cell- theory in
A: 1838
B: 1839✔
C: 1888
D: 1898
✍11) The largest cell
A: nerve cells
B: somatic cells
C: Germ cells
D: Ostrich egg ✓
✍12)The Nucleus is displaced to the side of cell in,
A: Plant cell ✓
B: Animal cell
C: Both
D: None
✍13)Somatic cell is represented by
A: S***m cell
B: Egg cell
C: Pancreatic cell✓
D: Zygote
✍14)Cell with out nucleoli die because they don't possess
A: centriol and are unable to obtain energy
B: Lysosomes and are unable to destroy wornout organelles
C: Mitochondria and are unable to obtain energy
D: Ribosomes and are unable to manufacture proteins ✓
✍15) In a plant cell the cytoplasm pushed to lie as layer around large central vaccuole called:
A: Primordial cuticle
B: Endoplasmic Reticulum
C: Cristae
D: Stroma
✍16) EUKARYOTIC cell differ from prokaryotic cell in all of the following except:
A: Scattered Chlorophyll
B: Ribosomes presence
C: Golgi complex
D: All of these
✍16)Robert Hooke examined the cells of cork under microscope,his work is reported in his famous book
A: Micrographia
B: Species Plantarum
C: The power of movement in plants
D: None of these
✍17) This is absent in prokaryotic cell
A: Chloroplast
B: Ribosomes
C: Cell wall
D: DNA
✍18) To count the cell which apparatus is used?
A: Laminar flow
B: Inverted microscope
C: Centrifuge
D: Hemocytometer
✍19) which distinguishes a prokaryotic cell from prokaryotic cell?
A: prokaryotic cell have a cell wall and nucleus
B: prokaryotic cells have no membrane bounded organelle
C: Prokaryotic cell have a centriole
D: prokaryotic cell have no Ribosomes
✍20).which of the following are present in all EUKARYOTIC cells:
A: Cell wall
B: Diploid Nucleus
C: flagellum
D: membrane bounded organelles
Which of the following are present in prokaryotic cells:
A:Chloroplast,DNA, nuclear envelope
B:Chromosomes,Mitochondria,nuclear envelope
C: Cytoplasm, Mitochondria,DNA
D:Cytoplasm,DNA,Ribosomes

12/06/2023

*Vitamins_Deficiency*

1- Vitamin “A”: Night blindness
2- Vitamin “B1”: Beriberi
3- Vitamin “B2”: Ariboflavinosis
4- Vitamin “B3”: Pellagra
5- Vitamin “B5”: Parestheia
6- Vitamin “B6”: Anemia
7- Vitamin “B7”: Dermititis and enteritis
8- Vitamin “B9” - “B12”: Megaloblastic anemia
9- Vitamin “B17”: Cancer
10- Vitamin “C”: Scurvy and swelling of gums
11- Vitamin “D”: Rickets and Osteomalacia
12- Vitamin “E”: less fertility
13- Vitamin “K”: Non-Clotting of blood

06/06/2023

SPSC Subject Specialist Botany June 3,2023

1. Araucaria araucana is commonly called
monkey puzzle tree
2.The largest herbarium of the world is located in Royal Botanical Graden,
Kew
3. Complete flower have
Calyx, Corolla, androecium and gynecium
4. Inflorescence of astraceae is
capitulum
5. international rice institute is located in Philippines
6.Excretion in Amoeba takes place by
contractile vacuole
7. largest ovule in the entire plant kingdom are found in
Cycas
8.Banana is mostly propagated by
rhizomes and suckers
9.yeast belong to
ascomycota
10. Sargassum is also called
gulfweed
11.Fungi are always
heterotrophs
12. Chlamydomonasis
unicellular
13. Prunus produces
bark
14.Gymnosperms fertilization by
porogamy
15.Aquatic plants have well developed
Aerenchyma
16.Pneumatophores are present in
mangrove plant
17. Albugu consists of many branched
septate, coenocytic hyphae
18. Vectors sometimes live and thrive on other host animals, called disease ______before they reach the human population.
reservoirs
19.moss protonema resembles with
green algae
20.Sweet potato is an example of
modified root

12/03/2023

(+, 0)

Interaction of organisms in which one partner is harmed while another is neither benefited nor harmed.

TYPES


Secretion of one microbe kills another microbe.



Secretion of one plant influences growth of other plants.