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CARBON DIOXIDE CONCENTRATION► Carbon dioxide is the major limiting factor for photosynthesis.► If the C*O_{2} concentration increases the rate of photosynthesis also increases but in the presence of higher concentration of C*O_{2} it is declined.► Increased rates of photosynthesis leading to higher productivity that has been used for some greenhouse crops such as tomatoes and bell pepper.► They are allowed to grow in carbon dioxide enriched atmosphere that leads to higher yields.► CO2 compensation point: It is a point on which amount of► CO2 consumption in photosynthesis is equal to the amount of C*O_{2} liberation in Respiration.

MEIOSIS▸ Meiosis involves two sequential cycles of nuclear and cell division called meiosis I and meiosis II but only a single cycle of DNA replication.▸ Meiosis I is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase.▸ Meiosis involves pairing of homologous chromosomes and recombination between non-sister chromatids of homologous chromosomes▸ Four haploid cells are formed at the end of meiosis II.Stages of Meiosis (Meiosis consists of two divisions)(i) Meiosis I (Reductional Division): During meiosis I, the number of chromosome is reduced to half. The homologous pairs of chromosomes get separated and cells become haploid. The two chromatids of the chromosome become genetically different due to crossing over.Meiosis I is followed by meiosis II at the end of which four haploid cells are formed

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BIOLOGY TRICKS ✨✨Learn the type of epithelium present at various sites in our body:1. Simple Squamous: BLEM B - Bowmans Capsule L- Lung Alveoli E- Endothelium M - Mesothelium2. Simple Cuboidal: ROT R- Renal tubules O -Outer Enamel Epithelium T- Thyroid Follicles3. Simple Columnar: BIG SIR B - Brain I - Intestines G- Gall Bladder S- Stomach I - Inner Enamel Epithelium R - Resp Tract4. Pseudostratified Columnar: Pls doNNT Booze P - Paranasal Sinus N- Nasal Cavity N- Nasopharynx T-Trachea B- Bronchi