Botany

Aestivation: Definition, Types, and Examples for Class 11th and NEET

Ovary Apocarp and Syncarp
The number of carpels in an ovary in the female reproductive organ of the flower gynoecium is varied. The monocarpellary ovary includes one carpel; the Polycarpellory ovary contains more than five carpels. Apocarpous ovary: When carpels are separated from one another, they are referred to as “Apocarpus ovary.” Michelia, Syncarpus ovary’, for example, Ladies finger is an example of syncarpus ovary, which occurs when carpels are joined.

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INFLORESCENCE: Denifition and Types For class 11th and NEET

Denifition: Inflorescence
An Inflorescence is a cluster of flowers produced by a plant and carried on a specific reproductive axis. The “Peduncle” refers to the main axis of the inflorescence. The pedicel is the name given to the flower’s stalk. A bract is a leaf-like structure that contains a flower or inflorescence. ‘Bracteate’ refers to a flower with bracts, while ‘Ebracteate’ refers to a flower without them. ‘Bracteolate’ refers to flowers having bracteoles, whilst ‘ebracteolate’ refers to flowers without bracteoles. “Bracteoles” refers to the flower and the Bract. ‘Bracteolate’ refers to a flower having bracteoles, while ‘Ebracteolate’ refers to a flower without them.

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LEAF: Features, Types, Functions, and Modification For class 10th,  11th, and NEET

Insectivorous plants: “Insectivorous plants” or “Carnivorous plants” are plants whose leaves have been adapted to capture insects to meet their nitrogen requirements.
1)The spoon-shaped Drosera Lamina is covered in sticky hairs called Tentacles that shimmer like dew in the sunlight. Insects mistook it for Nector and landed on it to feed. Sensitive tentacles bend over insects, trapping and digesting them using tentacle secretions.
2)In Nepenthes (Pitcher) complete Leaf is changed into a beautifully colored Pitcher, with a top to capture the Insects. The Pitcher’s inner wall is covered in hairs that prevent insects from escaping and secrete digestive enzymes that help it digest its protein. The Pitcher’s edge is a little slick. When an insect lands on a pitcher, it crawls inside and is digested.
3)Dionea muscipulata (Venus Fly Trap): It traps prey via trapping structures made by the margins of rosette leaves, which are equipped with tiny hair known as ‘Trigger hair.’ These are touch-sensitive. The lamina’s inner surface is brilliantly colored.
4) Utricularia (Bladderwort) is a submerged Hydrophyte with floating and submerged leaves. A Bladder with a Trap door is created from the floating leaf. It permits small aquatic insects to enter, then closes the trap door, imprisoning and digesting the bug to meet the nitrogen requirement.

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Stem: Features, Types, Functions, and Modification For class 11th and NEET

A) Herbs: ‘Herbs’ are little plants with soft, succulent, green, and less branching stems. Example, Sunflower, and paddy.
B) Shrubs: Shrubs are medium-sized plants with a hard, woody stem that is branched and has a bushy appearance.Example Hibiscus, and Custard apple.
C) Trees: ‘Trees’ are huge, tall plants with very hard, woody stems that have distinct trunks and are densely branched. Mango and Eucalyptus are two examples.

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DNA REPLICATION: DNA STRUCTURE, DNA-Dependent DNA Polymerase, Leading and Lagging strand

DNA REPLICATION: Definition During cell division, DNA replication occurs. It’s bidirectional, discontinuous, and semi-conservative (semi-conservative mechanism was demonstrated by Meselson and Stahl in 1958).DNA replication is a critical mechanism for an organism’s cell development, repair, and reproduction. OVERVIEW OF DNA STRUCTURE James Watson and Francis Crick established the structural model of DNA for the first

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DNA Packaging: Definition, Histone proteins, and Non-Histone proteins

Why is it necessary to package DNA?
The DNA is around 3 meters long and must fit into the nucleus, which is only a few micrometers in diameter. The DNA molecules must be packed into an incredibly compressed and compact structure called chromatin to fit into the nucleus. The DNA is reduced to an 11 nm fiber during the earliest phases of packaging, which represents approximately 5-6 folds of compaction. This is accomplished by packaging nucleosomes in a specific order. DNA packaging is divided into three categories.
1. The nucleosome is the first-order DNA packing.
2. Solenoid fiber is a type of second-order DNA packing.
3. Scaffold loop Chromatids Chromosome is the third order DNA packaging.

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Chromosome- Structure, Types, and Functions for Class 12th and NEET students

The Role and Importance of Chromosomes
Storage of Genetic Code: The genetic material essential for the organism’s development and growth is stored in the chromosome. A series of components called genes make up DNA molecules. Genes are regions of DNA that code for certain proteins that the cell needs to function properly.
Sex Determination: Humans have 23 pairs of chromosomes, one of which is designated as the sex chromosome. The gender of a child is determined by the chromosome passed down by the father. The child will be female if the X chromosome is passed out of the XY chromosome, and a male child will develop if the Y chromosome is passed out of the XY chromosome.
Control of Cell Division: During the process of mitosis, chromosomes check for successful cell division. The parent cells’ chromosomes ensure that the necessary information is passed on to the daughter cells that the cell needs to grow and develop properly.
Protein Synthesis and Storage: Chromosomes direct the sequences of proteins synthesized in our bodies and also keep DNA in order. The proteins are also kept in the chromosomes’ coiled shape. These proteins that are linked to DNA aid in the correct packaging of DNA.

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Mutation: Definition, Types, Effects, and Examples

Aneuploidy: It is characterized by the loss or gain of a chromosomal set. It’s a situation in which one or a few chromosomes are added or removed from the usual amount of chromosomes. As a result, the number of chromosomes in aneuploidy can differ from the number of chromosomes in the wild type.
Nullisomy, monosomy, and trisomy are three different kinds of aneuploidy.
1. Nullisomy (2n-2) is the lack of both homologous pair chromosomes. Most creatures may die as a result of these conditions.
2. Monosomy (2n-1) is the loss of one of the homologous pair’s chromosomes.
3. Trisomy refers to the addition of a second chromosome (2n+1). Trisomy includes conditions such as Klinefelter syndrome (44+XXY/XYY) and Down syndrome.

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