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The product formed in the following reaction sequence is:
Examine the figures A, B, C and D. In which one of the four options all the items, A, B, C and D are correct?
The Golgi complex participates in
Conifers are adapted to tolerate extreme environmental conditions because of?
Phylogenetic system of classification is based on:
Which one of the following structures is haploid in its ploidy level?
Identify the pair of heterosporous pteridophytes among the following :
The net resistance of a voltmeter should be large to ensure that:
If a charged particle (charge q) is moving in a circle of radius R at a uniform speed v, then the value of its associated magnetic moment μ will be:
A wheel with 20 metallic spokes, each 1 m long, is rotated with a speed of 120 rpm in a plane perpendicular to a magnetic field of 0.4 G. The induced emf between the axle and rim of the wheel will be: (1 G = 10⁻⁴ T)
Which one of the following is considered important in the development of seed habit?
Which one of the following is heterosporous?
In bryophytes, the gemmae help in which one of the following?
Which one of the following acids is a derivative of carotenoids?
Which classes of algae possess pigment fucoxanthin and pigment phycoerythrin, respectively?
The correct sequence of events in the life cycle of bryophytes is: A. Fusion of antherozoid with egg. B. Attachment of gametophyte to substratum. C. Reduction division to produce haploid spores. D. Formation of sporophyte.
Two spheres A and B of masses $m_1$ and $m_2$ respectively collide. A is at rest initially and B is moving with velocity $v$ along x-axis. After collision B has a velocity $\frac{v}{2}$ in a direction perpendicular to the original direction. The mass A moves after collision in the direction:
If you are asked to classify the various algae into distinct groups, which of the following characters you should choose?
Given below are the stages in the life cycle of pteridophytes. Arrange the following stages in the correct sequence: A. Prothallus stage B. Meiosis in spore mother cells C. Fertilisation D. Formation of archegonia and antheridia in gametophyte
Pneumatophores occur in