what are cyanophycean granules - biology - cell the unit of life 
what are cyanophycean granules??
cyanophysin granules are inclusion particles in the cyanobacteria
they mostly store nitrogen and carbon
a)



antipodals side is called chalazal end.

b) becausethe cells get packed with reserve food supplies, used for providing the nutrition to the developing embryo.

c)cells with 16 chromosomes is calledzygote and cells with 24 chromosome is called endosperm different cells in the body have different instructions or marching orders as to how they are to grow and function. sometimes clumps of cells with diverse marching orders form a tumor and mature into very different types of tissue. one type is called a dermoid cyst. these can contain a variety of different tissues including hair. see more... chloroplast is a powerhouse for the synthesis of carbohydrates in plants. it is broadly divided into three parts (fig 3) namely:a) membrane: chloroplast is double walled organelle viz. it contains inner and outer membrane.b) stroma corresponds to the cytoplasm of chloroplast. it also serves as site for dark reaction of photosynthesis to take place.c) thylakoids/ granum: thylakoids contains chlorophyll that absorbs light. stacks of thylakoids are known as granum.fig 3 shows different parts of chloroplast peculiarities of the dna structure: dna is a double helical structure having nucleotides. these nucleotides are made of deoxyribose sugar, phosphoric acid and nitrogenous bases such as adenine, thymine, cytosine and guanine. the nucleotide sequence of the dna molecule is called a gene. genes are present on dna. a type of gene is responsible for the synthesis of a particular protein. changes in the gene can alter the characteristics of the organisms. phylum platyhelminthes (flat worms) -

free living, commensal or parasite with dorsoventrally flattened body, bilaterally symmetrical, triploblastic and acoelomate.

- wherein

eg. taenia, fasciola

 

 


option 1)

flat worms

this is correct option

option 2)

sponges

this is incorrect option

option 3)

ctenophores

this is incorrect option

option 4)

corals

this is incorrect option **Hint—**  Vacuoles not only store many important substances, they also contain cell sap that give turgidity to cell hierarchical classification is a system of classifying organisms in different hierarchical levels. it includes the sequence of categories in a decreasing or increasing order from kingdom to species and vice versa. the domain is the highest rank in the hierarchy followed by division or kingdom, phylum, class, order, family, genus, and species. species is the lowest rank in the hierarchy. the species is the basic unit of biological classification and a taxonomic rank. these are the large number of physically similar organisms which can exchange genetic information. the centimetre (cm) is a unit of length in the metric system, equal to one-hundredth of a meter. the millimetre (mm) is a unit of length in the metric system, equivalent to one-thousandth of a meter and is the si base unit of length. 1 mm = 1/10 cm 1 mm = 0.1 cm to convert the unit of length in millimetres to centimetres follow the below steps: take the value of length in millimetres and multiply it by 0.1 cm the obtained value is the answer in centimetres 25mm x 0.1cm= 2.5 cm answer hence, 25 mm = 2.5cm yes, the plants have chloroplasts and they have chromoplasts. 

chromoplasts contain pigments, just like chloroplasts, but the pigments are not photosynthetic. their abundant pigments overwhelm the light reflected from the chloroplasts making the leaf another color. chromoplasts are what color flowers, fruit and other plant parts. the function of chromoplasts pigments can be as a signal or protective.

chromoplast content in leaves varies naturally in plants. plants with more chromoplasts can survive regions of marginal nutrient resources because they are better protected from both oxidative and uv stress. the green leaved sugar maple is more sensitive to nutrient stresses associated with low ph soils than the red maple acer rubrum. acidic soils are less fertile. an increase in chromoplast content can mediate the negative effects of nutrient imbalances on maples by relieving uv & oxidative stress. red maples can out compete other maples for nutrient poor acidic soils by having more chromoplasts. 
http://www.ingentaconnect.com/content/bsc/pce/2005/00000028/00000007/art00005 
http://www.rsc.org/delivery/\_articlelinking/displayhtmlarticleforfree.cfm?journalcode=pp&year=2005&manuscriptid=b417802e&iss=4

chromoplasts content in flowers signals to pollinators while in fruit it signals to seed dispersers when the plant is ready for them. chromoplasts are not different organelles they are chloroplasts that continued to mature with regulation to produce more carotenoids or anthocyanins than chlorophylls. a) the megasporogenesis occurs in the nucellus (towards the micropylar end).

the process of formation of megaspores from the megaspore mother cell is called megasporogenesis. ovules generally differentiate a single megaspore mother cell (mmc) in the micropylar region. of the nucellus. it is a large cell containing dense cytoplasm and a prominent nucleus. the mmc undergoes meiotic division. meiosis results in the production of four megaspores. in a majority of flowering plants, one of the megaspores is functional while the other three degenerate.

b)



the three celled male gametophytes has one vegetative cell and two male gametes and no generative cell.