Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Yakshi Baliyan 6 years, 8 months ago
- 1 answers
Posted by Yakshi Baliyan 6 years, 8 months ago
- 1 answers
Akarsh Kondapur 6 years, 8 months ago
Posted by Puthi Namitha 6 years, 8 months ago
- 1 answers
Yogita Ingle 6 years, 8 months ago
Oestrous cycle is the cyclical change in the reproductive phase of animals that is mainly non-primates. It involves changes in the ovaries, accessory ducts and hormones they secrete. Non-primates breed only during favourable conditions in the season. This breeding process comprise many cyclical changes constituting oestrous cycle. These organisms are called as seasonal breeders. Oestrous cycle stops once the female becomes pregnant.
Posted by Dancer Bk Kumawat 6 years, 8 months ago
- 2 answers
Yogita Ingle 6 years, 8 months ago
Genes are functional units of heredity as they are made of DNA. The chromosome is made of DNA containing many genes. Every gene comprises of the particular set of instructions for a particular function or protein coding. Speaking in usual terms, genes are responsible for heredity.
Gursharn Kaur 6 years, 8 months ago
Posted by Abhishek Vishwakarma 6 years, 8 months ago
- 1 answers
Meghna Thapar 5 years, 5 months ago
The oestrous cycle is the reproductive system in most mammals where reproductive hormones cause the cycles to start after puberty in sexually mature females. The menstrual cycle is the regular natural change that occurs in the female reproductive system that makes pregnancy possible. An oestrous cycle is a period of time in a female, between two subsequent heats or estrus. They occur during her reproductive cyclicity, after reaching puberty. Polyestrous continuous, such as cows and sows, present heats between regular periods of time during all the year. During oestrous cycle, the reproductive tract is prepared for estrus or heat (the period of sexual receptivity) and ovulation (ovum release). The cycle is divided into four parts: proestrus, estrus, metestrus and diestrus.
Posted by Priya # 6 years, 8 months ago
- 3 answers
Md Shaifuddin 6 years, 8 months ago
Mansi Sharma 6 years, 8 months ago
Posted by Subhi ? 6 years, 8 months ago
- 2 answers
Mrutyunjay Khatua 6 years, 8 months ago
Posted by Subhi ? 6 years, 8 months ago
- 1 answers
Priya # 6 years, 8 months ago
Posted by Nirbhay Singh 6 years, 8 months ago
- 1 answers
Subhi ? 6 years, 8 months ago
Posted by Prasansha Dutta 6 years, 8 months ago
- 0 answers
Posted by Mohamed Tousif Ahamed 6 years, 8 months ago
- 1 answers
Meghna Thapar 5 years, 5 months ago
Only 1 in 14 million of the ejaculated sperm will reach the Fallopian tube, but once there the sperm should pick up chemical signals from the egg to help them find their way forward. The sperm finally near the egg and push towards its shell (called the zona pellucida). Fertilization occurs in the fallopian tubes. As the fallopian tube pushes the egg towards the uterus, cilia push the sperm towards the egg. Progesterone and estrogen influence this process by increasing the number of cilia and how fast they move. As the sperm approaches the egg, they bind to the zona pellucida in a process known as sperm binding. This triggers the acrosome reaction, in which the enzymes of the acrosome are freed. These enzymes then begin to digest the zona pellucida and allow the sperm to tunnel toward the egg's plasma membrane.
Posted by Amit Khomane 6 years, 8 months ago
- 0 answers
Posted by Himanshu Mahajan 6 years, 8 months ago
- 0 answers
Posted by Himanshu Pushpakar 6 years, 8 months ago
- 1 answers
Yogita Ingle 6 years, 8 months ago
The meiotic division in MMC gives rise to a tetrad of megaspores out of which 3 degenerate and 1 becomes the functional megaspore. this megaspore undergoes mitosis to form the embryo sac.
Posted by Vishal Peru 6 years, 8 months ago
- 1 answers
Gursharn Kaur 6 years, 8 months ago
Posted by Lavanya ❤️? 6 years, 8 months ago
- 1 answers
Yogita Ingle 6 years, 8 months ago
Fission / Binary fission / Longitudinal fission / Multiple fission
Binary fission is the type of asexual reproduction in which two individuals are formed from a single parent and the parental identity is lost..
Posted by Jai Shiv Raj Selvam 6 years, 8 months ago
- 0 answers
Posted by Kanishka Sharma 6 years, 8 months ago
- 3 answers
Yogita Ingle 6 years, 8 months ago
Nucellus is the central part of a mature ovum that contains embryo sac. It is a mass of parenchyma tissue with diploid cells that protects the embryo and stores reserve food materials for the development of embryo.
Posted by Shaim Khan 6 years, 8 months ago
- 1 answers
Yogita Ingle 6 years, 8 months ago
Marigold , rice and wheat are annual plants hence they will flower in the same year in which the seed is sown. It takes approximately 3 months to flower after sowing the seeds.
Coconut and mango are trees hence they take a long time to flower. Mango flower after 3-6 years of sowing the seed, depending on the variety and grown conditions. Coconut takes longer time upto 7 years.
The plants which flower more than once, their inter flowering period is juvenile phase. Although they pass mature phase in flowering for the first time, but for the next time they need further development.
Posted by Himanshu Mamgain 6 years, 8 months ago
- 1 answers
Yogita Ingle 6 years, 8 months ago
The breaking up of a body of a simple multicellular organism into two or more pieces on maturing,each of which grows to form a complete new organism is called fragmentation.
For example: Spirogyra(a green filamentous algae plant found in ponds,lakes etc),sea anemones(marine animal)
Posted by Anuranjan Lakra 6 years, 8 months ago
- 1 answers
Posted by Vishal Kumar 6 years, 8 months ago
- 0 answers
Posted by Ishika Rani 6 years, 9 months ago
- 0 answers
Posted by Pawan Kumar 6 years, 9 months ago
- 0 answers
Posted by Prashant Kumar 6 years, 9 months ago
- 1 answers
Gaurav Seth 6 years, 9 months ago
Germplasm is the sum total of all the alleles of the genes present in a crop and its related species. Germplasm collections are usually maintained at very low temperature in the form of seeds. In case of fruit trees, the germplasm is maintained as trees grown in the field.
Posted by Astha Dewangan 6 years, 9 months ago
- 4 answers
Astha Dewangan 6 years, 9 months ago
Posted by Richa Sharma 6 years, 9 months ago
- 1 answers
Posted by Sakshi Jha 6 years, 9 months ago
- 0 answers
Posted by Aman Rajwar 6 years, 9 months ago
- 2 answers
Sayeda Iram Ateeq 6 years, 9 months ago
Posted by Janvi Dahre 6 years, 9 months ago
- 3 answers
Alia Siddiqui 6 years, 9 months ago
Alia Siddiqui 6 years, 9 months ago
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
Meghna Thapar 5 years, 5 months ago
Kingdom Animalia is subdivided into phyla and it starts from phylum Porifera. Members of this phylum are commonly known as sponges. They are generally marine. These are primitive multicellular animals and have a cellular level of organization. Sponges have a water transport system. They have pores on the surface of their body called Ostia from where water enters their body and leaves from a comparatively large pore called the osculum. They possess intracellular digestion. Their body is supported by a skeleton made up of spices or spongin fibres. Sexes are separate i. e., they are hermaphrodite. Fertilization is internal and development is indirect having a larval stage which is morphologically distinct from the adult.
Examples of sponges are:sycon, spongilla and euspongia
0Thank You