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  • 1 answers

Preeti Dabral 1 day, 21 hours ago

The next stage of prophase I in meiosis is the zygotene stage. During this stage, the chromosomes attach themselves by their ends (telomeres) to the inner membrane of the nuclear envelope.

  • 1 answers

Preeti Dabral 1 day, 21 hours ago

Nucleo - protein complex formation stage is observed during the pachytene stage of the meiosis type of cell division. In this stage a protein is formed between the two homologus chromosomes and may led to chromosomal pairing or synapsis.

  • 3 answers

Haritima Hada 2 days, 16 hours ago

It isof blood

Haritima Hada 2 days, 16 hours ago

Explanation or definition

Haritima Hada 2 days, 16 hours ago

What do you need
  • 1 answers

Preeti Dabral 3 days, 22 hours ago

TRANSMISSION OF NERVE IMPULSE

  • Normal State/ Polarized State

In the normal (resting) condition, the outer side of the nerve fiber carries positive (+) charge. This is called polarized state. At this state more Na+ ions are outside the the axon membrane.

 

  • On Stimulation (Depolarized State),

The axon membrane at the spot where stimulation takes place becomes more permeable to Na+ which move inwards and cause loss of Polarization, i.e., they become excited (depolarized state).

 

  • Repolarization

Meanwhile, the previous region become Repolarized due to active transport of Na+ ions again to the outside. (This transport is achieved by using energy thru ATP and its called ‘‘Sodium Pump’’).

 

‘‘Conduction of nerve impulse is a wave of depolarization followed by repolarization’’

Which means conduction of nerve impulse takes place by the movement of Na+ ions in and out of the axon membrane. While depolarization, Na+ ions move inside the membrane, and during repolarization they move outside the membrane due to the active transport of Na+ ions using energy thru ATP.

  • 1 answers

Preeti Dabral 4 days, 1 hour ago

Holozoic nutrition involves the ingestion and internal processing of solid and liquid food in an organism. This involves the steps of ingestion, digestion, absorption, assimilation and excretion. Ingestion is the intake of food, which is broken down into simpler organic matters by a process called digestion.

  • 2 answers

Sachin Yadav 3 days ago

Volvox

Adithya Dev A 4 days, 16 hours ago

Volvox.
  • 1 answers

Preeti Dabral 3 days, 23 hours ago

Red Algae Brown Algae Green Algae
Mainly marine. Marine forms. Chiefly freshwater.
Only a few are unicellular. Unicellular forms do not exist. Unicellular species are more.
Thylakoids unstacked. Occur in groups of three. Stacked in groups of 2-20.
Only chlorophyll-a present. Chlorophyll ‘a’ and 'c' present. Chlorophyll 'a' and ‘b’ is present
Fucoxanthin present Fucoxanthin is present. Fucoxanthin is absent.
Phycobilins present Absent Phycobilins absent.
Reserve food is Floridean starch. Reserve food is Laminarin. Reserve food is starch.
Motile stages are not observed. Present. The motile stage is present.
  • 2 answers

Adithya Dev A 4 days, 16 hours ago

No. As there are certain living organisms which do not reproduce like MULES, STERILE WORKER BEES and INFERTILE HUMAN COUPLES.

Abhay Singh 4 days, 18 hours ago

No. Because some living organisms can't do reproduction.
  • 1 answers

Sia 🤖 5 days, 1 hour ago

Modern taxonomy, also known as biosystematics, is a branch of systematics that identifies taxonomic affinity based on evolutionary, genetic, and morphological characteristics. The typological concept has been abandoned. Every category is the result of a process of evolution.
  • 2 answers

Khushi Tiwari 4 days, 20 hours ago

😂

Nishant Singh 5 days, 17 hours ago

Don't know
  • 1 answers

Abhay Singh 4 days, 18 hours ago

Nucleosides are the structural subunit of nucleic acids such as DNA and RNA.
  • 1 answers

Abhay Singh 1 week, 1 day ago

No. Because there are some living organisms which doesn't reproduce. eg. - mule, worker bee. Etc.
  • 1 answers

Abhay Singh 1 week, 1 day ago

... Growth is also not a defining characteristics of living or non living because growth means increase in mass and this contradict that non- living also live as we increase their mass by some means.
  • 5 answers

Khushi Tiwari 4 days, 20 hours ago

biology is the study of life .🎓📚

Yashika Chauhan🎓 6 days, 23 hours ago

Biologyis the branch of science it deals with the microgranisms

Abhay Singh 1 week, 1 day ago

Simply biology is study of life forms and living beings.

Naushin Fatima 1 week, 3 days ago

Biology is the study of science in which we study about the life of living organism.

Adithya Dev A 1 week, 4 days ago

Biology is the science of LIFE, its origin, evolution, classification and composition. Aristotle is considered to be the "Father of Biology".
  • 2 answers
He is father of zoology

Adithya Dev A 1 week, 4 days ago

Aristotle was the Greek scientist who was the first to classify living organisms based on certain basic features. He classified plants into HERBS, SHRUBS and TREES and animals into ENAIMA (with red blood) and ANAIMA (without a red blood). Also known as father of ZOOLOGY.
  • 4 answers

Abhay Singh 1 week, 1 day ago

All chemical processes occuring inside our body is metabolism.

Adithya Dev A 1 week, 4 days ago

The sum total of all biochemical reactions taking place within the body of an organism which indirectly stimulates the occurrence of life processes is known by the term METABOLISM. It is a combination of CATABOLISM (breakdown) and ANABOLISM (combination).

Omm Rahil 1 week, 5 days ago

The prosses in which the chemical reaction takes place is called metabolism

Robert V 1 week, 5 days ago

Energy or biochemical reactions
  • 4 answers

Royal Boy 1 week, 4 days ago

Maths is best

Sai Sudeep Kumar Das 1 week, 5 days ago

Bio - Truman's elementary or MTG at fingertips or CENGAGE PHY - CONCEPT OF PHYSICS BY HC VERMA CHEM- MTG AT FINGER TIPS OR FOUNDATION OF CHEMISTRY

, 🙂 1 week, 6 days ago

Other than it

Saswat Kumar Jena 1 week, 6 days ago

Ncert is the best book for neet preparation
  • 1 answers

Preeti Dabral 3 days, 20 hours ago

As the solubility of CO2 is 20-25 times higher than that of O2, the amount of CO2 that can diffuse through the
diffusion membrane per unit difference in partial pressure is much higher compared to that of O2.

  • 1 answers

Himanshu Pandey 2 weeks, 1 day ago

Sry dhivu,pr whatsapp hi ek aisa platform h jha mai tumhe send kr skta hoon😔
  • 0 answers
  • 0 answers
  • 2 answers

Sai Sudeep Kumar Das 1 week, 5 days ago

In cell biology, the nucleus is a membrane-bound organelle found in eukaryotic cells. Eukaryotes usually have a single nucleus, but a few cell types, such as mammalian red blood cells, have no nuclei, and a few others including osteoclasts have many. The main structures making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and isolates its contents from the cellular cytoplasm; and the nuclear matrix (which includes the nuclear lamina), a network within the nucleus that adds mechanical support, much like the cytoskeleton supports the cell as a whole.The cell nucleus contains all of the cell's genome, except for the small amount of mitochondrial DNA and, in plant cells, plastid DNA. Nuclear DNA is organized as multiple long linear molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are structured in such a way to promote cell function. The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression—the nucleus is, therefore, the control center of the cell.

Abhay Singh 2 weeks, 4 days ago

In the eukaryotic cell - _It is an organelle _ enclosed by nuclear membrane _ it contains most of cell's genetic material. FUNCTION:- _The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) . _ carries the genes, structures that contain the hereditary information.
  • 1 answers

Sia 🤖 2 weeks, 6 days ago

Epithelial tissues line the outer surfaces of organs and blood vessels throughout the body, as well as the inner surfaces of cavities in many internal organs. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
  • 1 answers

Sia 🤖 2 weeks, 6 days ago

Constipation is characterised by small amounts of hard, dry bowel movements usually fever than three times a week. In constipation, the faeces are retained within the rectum as the bowel movement occurs irregularly. The causes for constipation involve water deficiency, lack of roughage in diet, spasm of colon, lack of exercise, emotional stress and certain drugs. Indigestion is the condition in which the food is not properly digested leading to a feeling of fullness. The cause of indigestion are inadequate enzyme secretion, anxiety, food poisoning, over eating and spicy food consumption.
  • 2 answers

Your Crush😉😘😘 2 weeks, 4 days ago

Main difference is bacteria lacks cell wall .

Sia 🤖 3 weeks, 1 day ago

Differences between Bacteria and Cyanobacteria. Cyanobacteria is also known as blue-green algae. They differ from other bacteria in that cyanobacteria possess chlorophyll-a, while most bacteria do not contain chlorophyll. Chlorophyll-a gives them their characteristic blue-greencolor.

  • 2 answers

Abhay Singh 3 weeks, 1 day ago

In simple way key is a taxonomical aid which gives a chance of acception or rejection in character of organisms which helps in identification of organisms based on their similarities and dissimilarities .

Sia 🤖 3 weeks, 2 days ago

Key is a taxonomical aid that helps in identification of plant and animal species. These keys are based on similarities and dissimilarities in characters, generally in a pair called couplet. Each statement in a taxonomic key is referred to as a lead. It is also useful in identification of unknown organisms.

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