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  • 1 answers

Satyam Prajapati 36 minutes ago

External type of fertilisation occur in their reproduction
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Gaurav Seth 5 hours ago

There is alternation of generations between haploid gametophyte (male gametophyte and female gametophyte) and diploid sporophyte (main plant body) in the life cycle of a plant.

The anthers, which contain microsporangia, produce microspores by meiosis, and the microspores develop into male gametophytes called pollen.

The ovaries, which posses megasporangia simultaneously produce megaspores which grow into female gametophytes, called ovules. It is a seven celled structure with one large central cell containing two polar nuclei and one egg cell.

By the process of pollination, the pollen is transferred to the stigma of the pistil. The pollen grain germinates and a pollen tube grows down into the ovary. Eventually, two sperm nuclei travel down the pollen tube. One sperm nuclei fertilizes the egg forming zygote (which grows into an embryo) and the other two polar nuclei forming triploid cell (endosperm) which often serves as food for the embryo. This is called double fertilization. The Zygote which begins the next sporophyte generation, on complete development forms a seed. When the seed germinates, the sporophyte matures and the life cycle begins again.

 

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Yogita Ingle 8 hours ago

Objects having characteristics of cellular organisation,growth,reproduction,ability to sense environment & give response, metabolism etc.

  • 1 answers
Books is for studies bt ncert is more comfortable
  • 1 answers
It is the sub phylum of chordata
  • 2 answers
Mammalia have a unique features called mammary glands
Viviparous animals are called mammlia
  • 1 answers

Jagtar Mistri 1 day, 3 hours ago

Hi but i can't give you answer because i am the student of non medical
  • 2 answers

Sia 🤖 1 day, 6 hours ago

<th scope="col">

1. Vascular bundles are arranged in a ring.

1. Vascular bundles are scattered.

2. Secondary growth takes place.

2. Secondary growth does not happen.

3. Wood is formed.

3. Wood is not formed.

Tushar Tuhar 1 day, 1 hour ago

In dicot the secondary growth takes place
  • 2 answers

Satyam Prajapati 2 days, 1 hour ago

Brayophyta

Gaurav Bagga 2 days, 5 hours ago

Bryophytes and pteridophytes
  • 2 answers

Shahwez S 2 days, 13 hours ago

What is root

Ritusree Roy 2 days, 23 hours ago

Quickly
  • 1 answers

Sia 🤖 3 days, 6 hours ago

  • The proenzyme pepsinogen gets converted into the active enzyme pepsin in the presence of hydrochloric acid.
  • Pepsin acts on proteins and breaks them into proteoses and peptones (peptides).
    Pepsinogen {tex}\xrightarrow{{{\text{HCl}}}}{/tex} Pepsin + Protein {tex}\longrightarrow{/tex} Proteose + Peptone
  • 3 answers

Mehak Gautam 1 day, 6 hours ago

Mycoplasma are able of changing their shape according to the needs of the environment and lack cell wall hence, they are known as joker of the plant kingdom .

Sumit Verma 3 days, 3 hours ago

Why

Avneesh Singh 3 days, 12 hours ago

Mycoplasma
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  • 1 answers

Aditi ~Angel🙂 4 days, 2 hours ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.
  • Don't post personal information, mobile numbers and other details.
  • Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
  • Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
  • Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.
  • 1 answers

Sia 🤖 3 days, 11 hours ago

Secretes digestive enzymes and hormones. The intestinal villi are part of the mucosa.

  • 1 answers

Kailash Jangir 3 days, 17 hours ago

It means that diameter is same
  • 1 answers

Mehak Gautam 1 day, 6 hours ago

Meiosis is also known as reduction division. It is a special type of cell division that reduces number of chormosome by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them. This process occurs in all sexually reproducing single-celled and multicellular eukaryotes, including animals, plants, and fungi
  • 4 answers

Chhotu Kumar 4 days, 2 hours ago

Ye Cell chapter ka question h

Sumit Verma 4 days, 2 hours ago

Pleuro pneumonia like organism

Sakshi 🤗 🤗 4 days, 3 hours ago

Pleuro pneumonia like organisms

Akhand Pratap (Krishna) 4 days, 14 hours ago

PPLO stands for Pleuron pneumonia like organisms. For Eg. Mycoplasm. . . . . . . . . . . . Gud Morng
  • 2 answers

Ayush Singh 2 days, 3 hours ago

Pleuro pneumonia

Gaurav Seth 4 days, 13 hours ago

<th>BASIS FOR COMPARISON</th> <th>MITOSIS</th> <th>MEIOSIS</th>
Meaning Mitosis is the process of cell division which occurs in all types of cells (excluding *** cells), with the purpose of the asexual reproduction or the vegetative growth. Meiosis is the process occurs in the specialized type of cell called as meiocytes, which supports the sexual reproduction by the gametogenesis.
Discovered by Walther Flemming. Oscar Hertwig.
Steps required to complete the cycle Prophase, Metaphase, Anaphase, Telophase. Prophase I, Metaphase I, Anaphase I, Telophase I; (Meiosis II), Prophase II, Metaphase II, Anaphase II and Telophase II.
Occurs in Somatic cells. Germ cells.
  • 2 answers

Mamta Vishwakarma 4 days, 8 hours ago

1. Freshwater ,free-living, found in pond and ditches. 2. Absence of cell wall but certain flexible pellicle made up of protein. 3. It is mixotropic mode of nutrition.i.e., photosynthesis but also heterotrophic in absence of light.
1.They are photosynthetic in day and heterotrophic at night. 2.They have two flagella,one is long and other is very short. 3.They lack cell wall. Byt a thin layer of pellicle is present.
  • 1 answers

Aditi ~Angel🙂 5 days, 2 hours ago

The two kingdom classification was proposed by Aristotle and carolus linnaeus the father of taxonomy in 1768 it was very difficult to draw a line between Kingdom plantae and kingdom animalia for there were some organisms who had characteristics of animal kingdom and kingdom plantae for example euglena organism which was heterotrophic but have the capacity to do photosynthesis for it contain chlorophyll and it also possessed a cell wall which Kingdom animalia did not Robert H whittaker and American taxonomist in the year 1969 proposed five kingdom classification that was Kingdom animalia Kingdom plantae Kingdom fungi Kingdom Protista and Kingdom Monera virus was not included this was an appropriate division of kingdoms and now they could easily be a line drawn between all the kingdom's @diti😅
  • 1 answers

Mamta Vishwakarma 5 days, 2 hours ago

Diploid cells are those which contain a complete set i.e., 2n number of chromosomes whereas haploid cells are those that have half the number of chromosomesi.e., n number of chromosome in the nucleus.
  • 0 answers
  • 3 answers

Akhand Pratap (Krishna) 4 days, 12 hours ago

Do bar fretillisation is called double fretilisation. It occours in plant reproduction.

Yogita Ingle 5 days, 3 hours ago

Double fertilization means the fusion of one male gamete with egg cell and other male gamete with the polar nuclei, this is known as triple fusion.

Anjali Kumawat 5 days, 3 hours ago

Defination of double fertillization: Fertillization characteristic of seeds plants in which one sperm nucleus fuses with the egg nucleus to from an embryo & another fuses with polar nuclei to form endosperm.
  • 1 answers

Anjali Kumawat 5 days, 3 hours ago

Ribosomes The only organelles found in prokaryotic are ribosomes & cytoplasm which means the membrane bound organelles are absent in prokarypties lack true nucleus & membrane bound cell organelles.

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