CBSE > Class 11 > Biology | CBSE Board | Homework Help

Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body. The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion. These processes ensure that only waste and excess water are removed from the body.

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Explain the type of phyllotaxy with examples

Posted by Indarilang Syiemlieh 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Zeref Ken 7 years, 2 months ago

Phyllotaxy is the arrangement of leaves on the stem ..... Types of Phyllotaxy are ... 1.opposite ...in this leaves arises from same node but opposite to each other eg ..guava plant .. 2.alternate ...in this leaves arise from different nodes but in a alternate manner eg. Sun flower and mustard plant ... 3. Whorled ....in this 3 or morethan that leaves arises from same node to form a whorl ( arrangement of leaves in circular manner ) ... eg alstonia .... Hope this will help you ?

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Multicellular organisms have division of labour. Explain

Posted by Pranav Kumar 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Tonu Tj 7 years, 2 months ago

Yes.

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Does lipids are macro or micromolecu

Posted by Khalid Saifi 7 years, 2 months ago

CBSE > Class 11 > Biology

2 answers

Khalid Saifi 7 years, 2 months ago

thanks but when they found in group are known as macro

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Tonu Tj 7 years, 2 months ago

Lipids comes under the category of micro molecules but when they are tested they comes in the filtrate in which macromolecules comes. Show the exception comes here you should keep in mind that it is a micro molecule thank you bye

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Like roots, potato tuber is obtained from the soil. Give arguments to prove it a stem.

Posted by Arvind Sikroria 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Khalid Saifi 7 years, 2 months ago

all stem properties proved that

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Significant features of mitochondria

Posted by Rutuja Katre 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Khalid Saifi 7 years, 2 months ago

Store energy form of ATP And called power house of the cell Dual membrane structure

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Why frankia and rhizobium are not able to fix nitrogen when present freely in the soil?

Posted by Karan Pawar 7 years, 2 months ago

CBSE > Class 11 > Biology

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Define phyllotaxy

Posted by Indarilang Syiemlieh 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Ravi Raj 7 years, 2 months ago

Arrangement of leaves on stem.and branches is known as phyllo taxy

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Write 4 character of division bryophytes

Posted by Ayush Nagwanshi 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Ritu Thapliyal 7 years, 2 months ago

They are known as amphibian of plant kingdom; true roots are absent in them; they include various mosses and ferns; they lack vascular tissues.

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What is connective tissue

Posted by Aditya Pratap 7 years, 2 months ago

CBSE > Class 11 > Biology

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Plz mujhe koi synopsis ki correct definition btaye yeh kya hota h

Posted by Genius Ss 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Shivani Sharma 7 years, 1 month ago

A brief summary or a general survey of something.

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What are the economic importance of fabacea , solenacea, liliacea

Posted by Jayakrishnan M S 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Khalid Saifi 7 years, 2 months ago

Fabacea also used as medicine like muhlethi and decorative

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How does periderm formation take place in the dicot stem?

Posted by Divya Tripathy 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

Periderm is composed of the phellogen, phellem, and phelloderm.

During secondary growth, the outer epidermal layer and the cortical layer are broken because of the cambium. To replace them, the cells of the cortex turn meristematic, giving rise to cork cambium or phellogen. It is composed of thin-walled, narrow and rectangular cells.

Phellogen cuts off cells on its either side. The cells cut off toward the outside give rise to the phellem or cork. The suberin deposits in its cell wall make it impervious to water. The inner cells give rise to the secondary cortex or phelloderm. The secondary cortex is parenchymatous.

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Explain about connective tissue

Posted by Diksha Kushwaha 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Ayush Singh 7 years, 2 months ago

CT is a layer beneath the epithilial tissue it provide nutrition to epithelial tissue because vessels are not present in epithelia

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Where is test series option

Posted by Di Pa L Riyar Riyar 7 years, 2 months ago

CBSE > Class 11 > Biology

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Discuss in detail about the outermost covering of bacterial cell and the Three layers?

Posted by Ankit Yadav 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Chesta Pawan Manchanda 7 years, 2 months ago

Bacteria Cell Structure Cell Envelope - The cell envelope is made up of two to three layers: the interior cytoplasmic membrane, the cell wall, and in some species of bacteria an outer capsule. Cell Wall - Each bacterium is enclosed by a rigid cell wall composed of peptidoglycan, a protein-sugar polysaccharide molecule.

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Dosto ???NEET baale kitne hai yahan ?? aur koi yahan se akash, Biomentors ka student hai please batao bhaio ✅✅✅✅✅???????????

Posted by ???? S.M. Sachin ???? 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Ʌɐpɐʎ Ɐuɐɥsɹɐp . 7 years, 2 months ago

I am..but may be I will dropout after 12th.

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How does meiosis differ from mitosis?

Posted by Genius Ss 7 years, 2 months ago

CBSE > Class 11 > Biology

4 answers

Genius Ss 7 years, 2 months ago

Ji nhi hum pouch rhe h aap toh mukabla krne bala smj rhe ho yrr mujhe sachh mein smj nhi aaya what is synopsis.thanks aapne hume itna toh btaya

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???? S.M. Sachin ???? 7 years, 2 months ago

Genius ss knowledge check ker rahe ho.. Mei chaho tou abhi apne teacher se puchker bata doo mager..... Nhi ..... ...... Tou suno hamre pass time nahe time nahe kisi se mukabla kerne ka jis din khud se furst ho jaavegi ush din dekhenge.........?? Life is short so no competetion ?? jai bajarang bali

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Genius Ss 7 years, 2 months ago

Meiosis:~ synopsis is absent. Mitosis:~ synopsis is present. What is SYNOPSIS.plzz answer

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???? S.M. Sachin ???? 7 years, 2 months ago

Mitosis => cell divide, division Meiosis => chromosome no. Half hone ploidy change hone cell ki

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Cell membrane

Posted by Santosh Yadav 7 years, 2 months ago

CBSE > Class 11 > Biology

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Four similarity between blood and lymph....

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

Blood is a red coloured liquid which circulates in our body. It is red because it contains a pigment called haemoglobin in its red cells.

The main components of blood are:

(i) Plasma: It carries all the dissolved substances such as proteins, digested food, common salt etc from one part to another part of the body.

(ii) Red blood corpuscles (RBC): It carries oxygen from the lungs to all the cells of the body.

(iii) White blood corpuscles (WBC): It fights infection and protects us from diseases.

(iv) Platelets: It helps in the coagulation of blood in a cut or wound.

Functions of blood:
(i) It carries oxygen from the lungs to different parts of the body.
(ii) It carries carbon dioxide from the body cells to the lungs for breathing out.
(iii) It carries digested food from the small intestine to all the parts of the body.
(iv) It carries waste product called urea from the liver to the kidneys for excretion in the form of urine.
(v) It protects the body from diseases.

Lymph is a light yellow liquid. It is a medium of circulation in human body which flows only in one direction - from body tissues to the heart. The functions of lymph are:

(i) It takes part in the nutritive process of the body.

(ii) It protects the body by killing the germs drained out of the body tissues with the help of lymphocytes contained in the lymph nodes, by making antibodies.

(iii) It helps in removing the waste products like fragments of dead cells etc.

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What is lymph?Give at least three functions.

Posted by [email protected] M 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

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What is osomosis

Posted by Ashish Yadav 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Yogita Ingle 7 years, 2 months ago

Osmosis is the process in which solvent molecules moves through a semi-permeable membrane from a region of higher concentration to a region of lower concentration until the amount of fluid is equalised on both sides of the semipermeable membrane.

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Full form of NADPH and NADP

Posted by Ialammiki Lamare 7 years, 2 months ago

CBSE > Class 11 > Biology

2 answers

Yogita Ingle 7 years, 2 months ago

NADPH = Nicotinamide adenine dinucleotide phosphate, reduced. NADPH participates in anabolic reactions; reactions that consume energy in order build up or synthesize larger molecules. example: photosynthesis.
NADP = Nicotineamide adenine dinucleotide phosphate , It is a co-factor used in anabolic reactions such as lipids.

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Raj Karan 7 years, 2 months ago

Nicotinamide adenine dinucleotide phosphate

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What os bolting??

Posted by Ritu Thapliyal 7 years, 2 months ago

CBSE > Class 11 > Biology

3 answers

Ritu Thapliyal 7 years, 2 months ago

Thanks

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Amit Mahato 7 years, 2 months ago

In horticulture, bolting refers to the premature production of flowering stems, especially on horticultural and agricultural crops. ... Bolting also affects parts of the plant that are normally considered edible, such as the roots or leaves.

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Ritu Thapliyal 7 years, 2 months ago

is*

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Difference between notochord and nervecord and also tell their location and function and notochord present in chordates or not

Posted by Rajkumar Dhillon 7 years, 2 months ago

CBSE > Class 11 > Biology

1 answers

Meghna Thapar 5 years, 4 months ago

Notochord is a skeletal rod, and nerve cord is a solid strand of nervous tissue. The main difference between notochord and nerve cord is that notochord belongs to the skeleton whereas nerve cord belongs to the central nervous system of chordates. Notochord occurs between the nerve cord and the central nervous system. A notochord is a primitive beginning to the backbone. It appears in embryos as a small flexible rod made from cells from the mesoderm, which is one of the three layers of cells of embryos. Notochords are only found in the phylum chordata, a group of animals that includes humans.

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What is meaning of slits in gills slits

Posted by Rajkumar Dhillon 7 years, 2 months ago

CBSE > Class 11 > Biology