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2021-05-16 07:27:28 BIӨDIVΣЯƧƬIY ΛПD ᄃӨПƧΣЯVΛƬIӨП

𝐐𝐔𝐈𝐂𝐊 𝐑𝐄𝐕𝐈𝐒𝐈𝐎𝐍 𝐍𝐎𝐓𝐄𝐒
There are about 20,000 species of ants, 3,00,000 species of beetles, 28,000 species of fishes & 20,000 species of orchids

Term biodiversity was popularised by Edward wilson

India has 50,000 genetically different strains of rice and 1000 varieties of mango

Acc to IUCN (2004), No.of species discovered and described range about 1.5 million

Robert may estimate - total no.of species is around 7 million

More than 70% of species discovered are animals

More than 70% of animals are insects

Plants constitute not more than 22% of total species

Total no.of species of fungi is more than combined total of fishes, amphibians, reptiles and mammals

India occupy 2.4% of total land surface but they contribute 8.1% of total biodiversity

There are about 45,000 species of plants and twice as many animals are discovered in india

Acc to robert estimate...only 22% of total no.of species have been discovered


There are 1,00,000 plant species and more than 3,00,000 animals species are yet to be discovered in india

Columbia has 1400 species of birds...newyork - 105 species of birds, Greenland - 56 species

India has 1200 species of birds Amazonian rain forest in south

america has 1300 species of birds, 40000 species of plants, 427 amphibians, 427 mammals, 378 reptiles, more thab 1,25,000 invertebrates

The colonisation of tropical pacific island by humans has led to the extinction of 2000 species of native birds

Over 784 species have extincted in past 500 years ( 359 invertebrates, 338 vertebrates & 87 plants )

In last 20 years, 27 species disappeared

Around 15,500 species are facing threat of extinction

32% amphibians, 31% gymnosperms, 23% mammals, & 12% birds are facing threat of extinction Open / Comment

2021-05-14 08:01:35 𝙎𝙏𝙍𝙐𝘾𝙏𝙐𝙍𝘼𝙇 𝙊𝙍𝙂𝘼𝙉𝙄𝙎𝘼𝙏𝙄𝙊𝙉 𝙄𝙉 𝘼𝙉𝙄𝙈𝘼𝙇𝙎

𖣔𝓣𝓻𝓲𝓬𝓴𝓼 𝓽𝓸 𝓻𝓮𝓶𝓮𝓶𝓫𝓮𝓻 𝓮𝓹𝓲𝓽𝓱𝓮𝓵𝓲𝓾𝓶 𝓽𝓲𝓼𝓼𝓾𝓮 𝓵𝓸𝓬𝓪𝓽𝓮𝓭 𝓲𝓷 𝔂𝓸𝓾𝓻𝓮 𝓫𝓸𝓭𝔂

1. Simple Squamous: 𝘽𝙇𝙀𝙈
B - Bowmans Capsule
L- Lung Alveoli
E- Endothelium
M - Mesothelium


2. Simple Cuboidal: 𝙍𝙊𝙏
R- Renal tubules
O -Outer Enamel Epithelium
T- Thyroid Follicles


3. Simple Columnar: 𝘽𝙄𝙂 𝙎𝙄𝙍
B - Brain
I - Intestines
G- Gall Bladder
S- Stomach
I - Inner Enamel Epithelium
R - Resp Tract


4. Pseudostratified Columnar : 𝙋𝙡𝙨 𝙙𝙤𝙉𝙉𝙏 𝘽 𝙤𝙤𝙯𝙚
P - Paranasal Sinus
N- Nasal Cavity
N- Nasopharynx
T-Trachea
B- Bronchi Open / Comment

2021-05-14 05:28:27 IMPORTANT NOTES

1) Red color of carrot and tomato is due to:
anthocyanin
2) P.H of human blood is
7.0
3) Largest organ inside human body is:
Liver
4) Largest organ of human body is:
skin
5) What is celluloses:
Carbohydrates
6) The smallest of all human cells are:
RBCs
7) No of bones in human body is:
206
8) Smallest unit of life is:
Cell
9) Red blood cells have no:
Nucleus
10) White blood cells are also known as:
Leucocytes
11) Red blood cells are also known as:
Erythrocytes
12) Life appeared on earth about:
3 billion years ago
13) When earth was formed its atomsphere were composed of:
Water vapour, ammonia and Methane
14) Biochemical organ of life is discovered by:
Oparin
15) Group of cells are termed as:
Tissue
16) Kingdom fungi are known as:
Decomposer
17) Which cell organelles not participate in cell division:
Ribosomes
18) Longest bone in human body is:
Femur
19) Shortest bone in human body is:
Stapes
20) Most important food is derived from:
Fruits
21) After human most intelligent mammal is:
Dolphins
22) Prokaryot doesn't possess:
Nucleus
23) Eukaryot has a:
Nucleus
24) In bacterial cell..............is not found:
Golgi apparatus
25) ................Is found in plant cell while in animal cell it is absent.
Cell wall

▒☞@PHYSICS_WALLAH_OFFCIAL Open / Comment

2021-05-12 17:01:34 𝘼𝙇𝙇 𝘼𝘽𝙊𝙐𝙏 𝙏𝙄𝙎𝙎𝙐𝙀𝙎

Tissues are categorized as −
Plant Tissue
Animal Tissue

❀❀❀Plant Tissue❀❀❀
Following are the major types of plant tissue −
Meristematic Tissues
Permanent Tissues


Simple Permanent Tissues
Parenchyma
Collenchyma
Sclerenchyma
Epidermis

❀ Complex Permanent Tissue ❀
Xylem
Phloem

❀ Meristematic Tissue ❀
Meristematic tissue mainly consists of actively dividing cells, and helps in increasing the length and thickening the stems of the plant.

Meristematic tissue, commonly, present in the primary growth regions of a plant, for example, in the tips of stems or roots.

Depending on the region (where the meristematic tissues are found); meristematic tissues are classified as apical, lateral, and intercalary (see the image given below).

Apical meristem (as shown in the above image) is present at the growing tips of stems and roots and helps in their growth.

Lateral Meristem is found in stem or root region and helps in their growth.

Intercalary meristem is found at the base of the leaves or internodes (on twigs) and helps in growth.


Permanent Tissue
Cells of meristematic tissue later differentiate to form different types of permanent tissue.

Permanent Tissue is further categorized as −
Simple Permanent Tissue and
Complex Permanent Tissue

Simple Permanent Tissue
Simple Permanent Tissue further categorized as −
Parenchyma
Collenchyma
Sclerenchyma
Epidermis

Parenchyma tissue provides support to plants and also stores food.
Sometimes, parenchyma tissue contains chlorophyll and performs photosynthesis, in such a condition, it is known as collenchyma.
The collenchyma tissue provides flexibility to plant and also provides mechanical support (to plant).
The large air cavities, which are present in parenchyma of aquatic plants, give buoyancy to the plants and also help them float, are known as aerenchyma.
The Sclerenchyma tissue makes the plant hard and stiff. For example, the husk of a coconut is made up of sclerenchymatous tissue.
The cells of Sclerenchyma tissue normally are dead.
The outermost layer of cells is known as epidermis.
The epidermis is usually made up of a single layer of cells.
The entire surface of a plant has the outer covering of epidermis, which protects all the parts of the plant.


Complex Permanent Tissue
The complex tissue, normally, consists of more than one type of cells which work together as a unit.

Complex tissues help in the transportation by carrying organic material, water, and minerals up and down in the plants.

Complex Permanent Tissue is categorized as;
Xylem
Phloem

Xylem, normally, consists of tracheid, vessels, xylem parenchyma, and xylem fibers.

Xylem is accountable for the conduction of water and mineral ions/salt.

Phloem, normally, is made up of four types of elements namely −
Sieve tubes
Companion cells
Phloem fibers and
Phloem parenchyma

Phloem tissue transports food from leaves to other parts of the plant.

╔═════════════════════╗
▒☞@PHYSICS_WALLAH_OFFCIAL
╚═════════════════════╝ Open / Comment

2021-05-11 03:10:49 𝚂𝚘𝚖𝚎 𝙸𝚖𝚙𝚘𝚛𝚝𝚊𝚗𝚝 𝙲𝚘𝚗𝚗𝚎𝚌𝚝𝚒𝚗𝚐 𝚕𝚒𝚗𝚔𝚜 𝚋𝚎𝚝𝚠𝚎𝚎𝚗 𝙶𝚛𝚘𝚞𝚙𝚜 : ---


1. Bacteria & Fungi
Actinomycetes

2. Reptiles & Birds
Archaeopteryx

3. Chordates & Non-chordates
Balanoglossus

4. Cartilaginous & Bony fishes
Chimera (Rabbit fish/Ratfish)

5. Bryophytes & Pteridophytes
Club moss

6. Coelenterates & Platyhelminthes
Ctenophora

7. Pteridophytes & Gymnosperms
Cycas

8. Reptiles & Mammals
Echidna (Spiny ant eater)

9. Animals & Plants
Euglena

10. Gymnosperms & Angiosperms
Gnetum

11. Protista & Bryophytes
Hornworts

12. Pisces & Amphibia
Latimeria

13. Protista & Fungi
Myxomycetes

14. Annelida & Mollusca
Neopilina

15. Reptiles & Mammals
Ornithorhynchus (Duck billed platypus)

16. Annelida & Arthropoda
Peripatus (walking worm)

17. Protozoa & Porifera
Proterospongia

18. Bony fishes & Amphibia
Protopterus (Lung fishes)

19. Virus & Bacteria
Rickettsia

20. Amphibia & Reptiles
Seymouria

21. Amphibia & Reptilia
Sphenodon (Living fossil lizard)

22. Echinodermata & Chordata
Tornaria larva

23. Annelida & Mollusca
Trochophore larva

24. Living & non-living
Virus

25. Protozoa & Metazoa
Xenoturbella
╔═════════════════════╗
▒☞@PHYSICS_WALLAH_OFFCIAL
╚═════════════════════╝ Open / Comment

2021-05-10 03:04:35 *𝘽𝙞𝙤𝙡𝙤𝙜𝙮 𝙏𝙧𝙞𝙘𝙠*

*𝙒𝘽𝘾*

𝙉𝙚𝙫𝙚𝙧 𝙡𝙚𝙩 𝙢𝙤𝙣𝙠𝙚𝙮 𝙚𝙖𝙩𝙨 𝙗𝙖𝙣𝙖𝙣𝙖

𝙀𝙭𝙥𝙡𝙖𝙣𝙖𝙩𝙞𝙤𝙣

𝙉: 𝙉𝙚𝙪𝙩𝙧𝙤𝙥𝙝𝙞𝙡𝙨 : 𝙈𝙤𝙨𝙩 𝙖𝙗𝙪𝙣𝙙𝙖𝙣𝙩

𝙇: 𝙇𝙮𝙢𝙥𝙝𝙤𝙘𝙮𝙩𝙚 : 𝙎𝙢𝙖𝙡𝙡𝙚𝙨𝙩 𝙘𝙤𝙧𝙥𝙪𝙨𝙘𝙡𝙚

𝙈: 𝙈𝙤𝙣𝙤𝙘𝙮𝙩𝙚 : 𝙇𝙖𝙧𝙜𝙚𝙨𝙩 𝙘𝙤𝙧𝙥𝙪𝙨𝙘𝙡𝙚𝙨

𝙀: 𝙀𝙤𝙨𝙞𝙣𝙤𝙥𝙝𝙞𝙡𝙨/𝘼𝙘𝙞𝙙𝙤𝙥𝙝𝙞𝙡𝙨: 𝘽𝙄𝙡𝙤𝙗𝙗𝙚𝙙

𝘽: 𝘽𝙖𝙨𝙤𝙥𝙝𝙞𝙡𝙨 : 𝙇𝙚𝙖𝙨𝙩 𝙖𝙗𝙪𝙣𝙙𝙖𝙣𝙩




𝙎𝙤 *𝙆𝙚𝙚𝙥 𝙨𝙪𝙥𝙥𝙤𝙧𝙩𝙞𝙣𝙜* 𝙖𝙣𝙙 *𝙎𝙩𝙖𝙮 𝙩𝙪𝙣𝙚𝙙* 𝙎𝙩𝙖𝙮 𝙨𝙖𝙛𝙚*
________

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