Maharashtra Board Class 12 Biology Guess Paper 2027

When food is translocated from phloem to pith, it is called _____ translocation. (a) radial (b) tangential (c) upward (d) downward

Identify 'A' from the graph given below showing species area relationship : [species-area relationship graph]

Rivet Popper Hypothesis explains (a) loss of biodiversity (b) biomagnification (c) species area relationship (d) significance of diversity

[figure of population growth curve] Choose the correct name of phases A, B and C in the given figure : (a) Stationary, Log, Lag (b) Log, Lag, Stationary (c) Log, Stationary, Lag (d) Lag, Log, Stationary

The microorganism used for production of beverages like wine, whisky, etc. is _____. (a) Streptomyces venezuelae (b) Saccharomyces cerevisiae (c) Aspergillus niger (d) Streptomyces griseus

Which of the following is NOT a Day Neutral Plant (DNP)? (a) Cucumber (b) Tomato (c) Cotton (d) Tobacco

Flavr savr tomato is genetically modified variety for improving _____. (a) shelf life (b) disease resistance (c) iron content (d) yield

A petridish containing nutrient medium shows tremendous increase in number of bacteria in short time. It is _____ growth. (a) slow (b) exponential (c) logistic (d) linear

Weight loss, increased BMR and protruding eyeballs are the characteristics of _______. (a) Cretinism (b) Exopthalmic goitre (c) Myxodema (d) Simple goitre

Charas and ganja are different products obtained from ______. (a) Papaver somniferum (b) Erythroxylum coca (c) Atropa belladonna (d) Cannabis sativa

Name the causative agent of typhoid.

How many meiotic divisions are required to produce 80 male gametes in Angiosperms?

Name the process in which swelling of hydrophilic colloids occur due to adsorption of water.

What are Long Day Plants (LDP)?

Which part of human brain is responsible for maintaining body balance?

What is the approximate volume of blood pumped out during one cardiac cycle in adult human?

Name the milk secreted by mammary gland soon after parturition.

Give the function of Leydig's cells.

Differentiate between Inspiration and Expiration with respect to position of diaphragm and working of intercostal muscles.

Complete the chart showing human proteins produced by DNA technology to treat human diseases and re-write. Disorders/diseases | Recombinant Proteins: ? | Erythropoietin; Asthma | ?; ? | Tissue plasminogen activator; Emphysema | ?

Draw a neat diagram of structure of root hair showing vacuole, mitochondria and nucleus.

Give the skeletal features of Homo erectus.

Sketch and label the Graafian follicle showing theca externa, antrum and corona radiata.

Identify A, B, C and D from the following table regarding respiratory system : Organism/Habitat/Respiratory organ - A(Terrestrial, Tracheal tubes and spiracles), Scorpions(Terrestrial, B), Sponges(C, Plasma membrane), Turtles(Underwater, D).

Arrange the following steps of DNA fingerprinting in correct sequence : (a) Gel electrophoresis (b) Isolation of DNA (c) Southern blotting (d) Restriction digestion

Mention any four factors affecting water absorption.

Explain leaching, humification and mineralization as the steps of decomposition process.

Write the name and position of any three valves in human heart.

Define : (a) Siphonogamy (b) Parthenocarpy (c) Polyembryony

Write any three characters each of Archaeopteryx showing Reptilian and Avian features.

(a) Give the composition of biogas. (b) Enlist the benefits of biogas.

Mention any six symptoms of disorder caused by trisomy of 21st chromosome.

Give the different steps involved in formation of m-RNA from hn-RNA.

(a) Following are the diagrams of entry of pollen tube into ovule. Identify the type A and B. [diagrams of pollen tube entry into ovule] (b) Give any four points of significance of double fertilization.

(a) Write a note on Holandric genes. (b) Complete the following table: A / B: (i) Monosomy - (1) ___ (ii) ___ - (2) 2n-2 (iii) Trisomy - (3) ___ (iv) ___ - (4) 2n+2

Explain nuclear and helobial type of endosperm with suitable examples.

With the help of labelled diagram describe the structure of human sperm.