Biology today

...

Subscribe online atwww.mtg.in Owned, Printed and Published by Mahabir Singh from 406, Taj Apartment, New Delhi - 29 and printed ...

SECTION - A Which factor stimulates the secondary oocyte to complete the suspended second meiotic division in humans? Mention t ...

...

(a) What is the fate of part labelled as 'A'? (b) How does chromosome number change when 'A' changes to 'B'? Karyotype of a hum ...

Statins competitively inhibit the enzyme b-hydroxy-b- methyl glutaryl CoA reductase responsible for synthesis of cholesterol an ...

meiosis-I and meiosis-II to give rise to spermatids, which are haploid (n = 23, in humans). So, when 'A' changes to 'B' chromoso ...

Pyramid of numbers is a graphic representation of the number of individuals per unit area at various trophic levels. In most ca ...

linker DNA together constitute chromatosome. Nucleosome chain gives a beads on string appearance under electron microscope. The ...

...

Which of the following is/are correct statement/s? (i) at high light intensity, chloroplast in mesophyll cells of leaf, lies pe ...

Energy required for aTP synthesis in Z-scheme comes from (a) electron gradient (b) oxidation of glucose (c) reduction of gluco ...

Form IV Place of Publication : New Delhi Periodicity of its publication : Monthly Printer’s and Publisher’s Name : Mahabir Sing ...

Water will move from the root hair through cortex to xylem, if the water potentials (ψw) are Root hair Cortex Xylem (a) 0 +1 + ...

Which of the following is a true statement? (a) Nerium has sunken stomata like Cycas to decrease rate of transpiration. (b) hy ...

Fermentation takes place under anaerobic conditions in many (a) prokaryotes (b) unicellular eukaryotes (c) germinating seeds ( ...

Which one is paired incorrectly? (a) auxin – Isolated in pure form from human urine. (b) Zeatin – Isolated from corn kernels. ( ...

Assertion: movement of materials inside phloem is bidirectional i.e., it can be both upwards or downwards. Reason: movement of ...

(c) r = intrinsic growth rate (d) dN dt = population density In an exponential growth, where each symbol has its usual meaning ...

(n) World’s Summit on Sustainable Development held in year 2002 in South africa. (a) 3 (b) 2 (c) 4 (d) None of these IUcN red L ...