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Ray florets have:
Which stage of meiosis can last for months or years in the oocytes of some vertebrates?
A particle is projected up with an initial velocity of $80\text{ ft/sec}$. The ball will be at a height of $96\text{ ft}$ from the ground after (Given $g=32\text{ ft/s}^2$):
Given below are two statements: One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A): During menstrual cycle, the ovulation takes place approximately on 14th day. Reason (R): Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum. In the light of the above statements, choose the most appropriate answer from the options given below.
Select the correct match:
Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage?
A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. If the current in the circuit is 0.5 A, what is the terminal voltage of the battery when the circuit is closed?
In Antirrhinum, two plants with pink flowers were hybridized. The F1 plants produced red, pink, and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by RR, and White by rr genes.
When a ball is thrown up vertically with velocity $v_0$, it reaches a maximum height of '$h$'. If one wishes to triple the maximum height then the ball should be thrown with velocity:
How does steroid hormone influence the cellular activities?
Haemophilia is more commonly seen in human males than in human females because:
Chromosomal theory of inheritance was proposed by:
The centriole undergoes duplication during:
If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three seconds, the time of the travel is:
The magnetic force acting on a charged particle of charge $-2 \mu C$ in a magnetic field of $2 T$ acting in y-direction, when the particle velocity is $(2\hat{i} + 3\hat{j}) \times 10^6 \text{ ms}^{-1}$ is:
A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by:
Axile placentation is present in?
Among China rose, mustard, brinjal, potato, guava, cucumber, onion and tulip, how many plants have superior ovary?
Correct position of floral parts over thalamus in the mustard plant is:
A train moving at a speed of $220 \text{ ms}^{-1}$ towards a stationary object, emits a sound of frequency $1000 \text{ Hz}$. Some of the sound reaching the object gets reflected back to the train as an echo. The frequency of the echo as detected by the driver of the train is (speed of sound in air is $330 \text{ ms}^{-1}$)