In an amphitropous ovule, the embryo sac becomes horse-shoe shaped and the funiculus and m...

Poison fangs are for defensive purpose not to escape predation. Hence it is the option .

Endonucleases hydrolyse internal phosphodiester bonds in a polynucleotide chain (.i.e., DNA). While...

Salivary gland chromosomes are very useful in gene mapping because they have endoreduplicated chromo...

About 20% of plasma fluid filters out into the Bowmans capsule through a thin&nb...

Gamma rays (from cobalt 60) is generally used for induced mutation in crops plants.

Plates having streptomycin allow to propagate only those bacteria which are resistant to the antibio...

$A ^2 +2Aa+a ^2 =1$$(o.6)2 + 2 (o.6)(0.4) +(o.4)^ 2$0.48 is the heterozygous condition.

Frankia is a bacterium, it grows in symbiotic association with the roots of at least eight families ...

Adventive embrony, also called sporophytic apomixes, sporophytic budding or nucellar embryony. Here ...

Golden rice is improved with the gene that produces Vitamin A in the rice.

Green house effect is due to emission of green house gases like $CO_ 2$ and $CH_ 4$ .

In litchi, aril forms the edible part in fruit. It is a collar like out growth f...

The most common medical problem associated with glucose-6-phosphate dehydrogenase de...

Ectophloic siphonostele is a monostele version of siphonostele. In this, a circular ring o...

4 ATP are formed in glycolysis ,2 ATP in Krebs cycle and 34 ATP&n...

The plant has tiny hair like structures protruding on its outer surface, when an insect touches this...

It is due to trisomy of 21 st chromosome.

Prairies contain tall grasses and shrubs

Chlorophyll present in the membrane of thylakoid , where granum is the sac of thylakoid

Newly formed protein enters within the cavity of rough ER and follows following path: Protein →

The fixation of $CO_ 2$  in $C_4$ -plants takes place in two places and by two differ...

Cretinism is due to hypothyroidism.

Fungus provides protection, absorbs and helps in anchorage to alga while alga photosynthesizes and p...

Fungus provides protection, absorbs and helps in anchorage to alga while alga photosynthesizes and p...

Statement (1) is incorrect because flip-flop or transmembrane movement is due to the migration of li...

Centromere plays an essential role in proper chromosome segregation during mitosis and meiosis ...

Cycads is a group of gymnosperms which have top shaped multiciliated male gametes (largest male game...

Norman Borlaug is considered to be the father of Green revolution.

In C4 -plants every CO2 molecule has to be fixed twice, so these plants are needed more en...

Resolving power or resolution is the ability of the lens to distinguish fine details and structure....

Resolving power or resolution is the ability of the

In reverse transcription, RNA is used to make the DNA template, contrary to the central dogma of mol...

Synergids direct the entry of the male gametes present in the pollen tube towards the egg cell and p...

Cu, Mn and Fe are those micronutrients which affect both photosynthesis and mitochondrial electron t...

“ELISA” is used to 'detect viruses', where “Alkaline phosphatase is the key reagent”. The most

Fresh water protozoans live in hypotonic solution so, for regulation of excess of water which comes ...

A segment (T-DNA) of tumour-inducing plasmid (T1) can be transformed from the bacterium Agrobacteriu...

LH and FSH influence ovulation.

Serratia species are opportunistic gram-negative bacteria classified in the tribe Klebsielleae ...

Mast Cells are found close to small blood vessels in loose connective tissue. They co...

Water conservation is most important for terrestrial animals as it is a limiting factor.

Fat soluble vitamins are A, D, E and K. Deficiency of vitamin A leads to night blindness or nyctalop...

The most likely reason for the development of resistance against pesticides in insects damaging a cr...

In case of transition, purine is replaced by another purine base and pyrimidine by another pyrimidin...

Retroviruses are named due to the presence of RNA as the genetic material and contain the enzyme rev...

In the resting nerve fibre, the cytoplasm inside the axon has a high concentration of K+ a...

Restriction enzymes are enzymes which recognizes and cuts up DNA that is foreign to a cell. These en...

In Echinoderms, adults exhibit radial symmetry wile larval forms show bilateral symmetry. Example: B...

DNA fingerprinting is a modern technique that compares sets of DNA by locating identical sequences o...