List of practice Questions

Species 1 and 2 belong to the same genus and co-occur at the same site. Which one or more of the following strategies would facilitate their coexistence at the site?
A researcher carried out an experiment to study how daylength and temperature influence diapause in a moth species. He placed larvae in one of four treatment conditions for 2 weeks, with 30 larvae in each condition. The treatments involved two temperatures (18°C or 27°C) and two lighting conditions (12h:12h Light:Dark (LD) or complete darkness (DD)). At the end of the experiment, he counted the number of larvae that had entered diapause and those that had not. The data are shown below.
ConditionLarvae in diapauseLarvae NOT in diapause
Treatment 1 (27°C, 12:12 LD)228
Treatment 2 (18°C, 12:12 LD)723
Treatment 3 (27°C, DD)1218
Treatment 4 (18°C, DD)291
Which one or more of the following conclusions can he reasonably make from these findings?
Population growth of a species can be modelled as \[ \frac{dN(t)}{dt}=rN(t)\left(1-\frac{N(t)}{K}\right), \] where \(N(t)\) is the population size at time \(t\), \(r\) is the growth rate, and \(K\) is the carrying capacity of the environment. For \(K=9000\), \(\dfrac{dN(t)}{dt}\) is maximized at \(N=\) ______ (Answer in integer)
The genome of a diploid species has 10 genes. In a population of this species, if each gene has two unique alleles, then the number of possible unique genotypes in this population is ______ (Answer in integer)
Bob is studying the effect of coral and sponge species on reef ecosystems using experiments in artificial square tanks. In each tank, he places 3 species of corals and 2 species of sponges. If there are 6 species of corals and 5 species of sponges to choose from, the minimum number of tanks required to test all combinations of 3 coral and 2 sponge species is ______ (Answer in integer)
Select the composer of Tillana :
A relation $R$ on set $A=\{1,2,3\}$ defined as $R=\{(1,2),(2,1),(2,2)\}$ is
Which of the following encourages development and implementation of open standards for geospatial content and services?
Name any two types of antibodies found to give humoral immune response in humans.
When two activities are grouped together and scheduled together to save time and energy, it is called __________
Why are magnesium blocks attached to iron water pipelines?
What type of assistance will be required during natural/other calamities?
Name any four communication barriers.
Explain the concept of market segmentation and its importance in targeting consumers.
Two parallel plate capacitors X and Y are connected in series to a 6 V battery. They have the same plate area and same plate separation but capacitor X has air between its plates, whereas capacitor Y contains a material of dielectric constant 4. Calculate the capacitances of X and Y, if the equivalent capacitance of the combination of X and Y is \( 4 \, \mu\text{F} \). Calculate the potential difference across the plates of X and Y.
The state where the movement against outsiders was started by students.
Give reasons for the development of bead-making industry at Kodumanal.
Define: (i) True North, (ii) True Bearing.
Write any four benefits of green jobs.
Vitamin $B_{12}$ is a complex compound of :
Write any two fat soluble vitamins.
Identify the Indian social reformer of the nineteenth century with the help of the following information and choose the correct option :
• Opposed child marriage
• Advocated for social justice
• Campaigned for reform of Hinduism
• Known for Vedantic theory
A tech company has launched a new tablet designed specifically for artists, with enhanced stylus sensitivity, high-resolution displays, and a suite of professional-grade creative software. The company believes that the tablet will appeal to both professional and amateur artists looking for a versatile, portable device for digital art creation. Early reviews have praised the tablet's impressive performance and the quality of its drawing features. Which of the following may most reasonably be inferred from the statements above?
Oliver has done great work in neurology, but his paper mixes too much of his personal life with his research. The inclusion of so many anecdotes makes it less objective, so the scientific community doesn’t see it as a rigorous study. Which of the following conclusions can be most reasonably drawn from the passage above?
Several travellers complain about the bland food provided to them on airlines. Actually, airline food tastes bland due to the combination of low humidity and low cabin pressure at cruising altitude, which suppresses the senses of taste and smell. The dry air dehydrates your nasal passages, and the reduced pressure makes you less sensitive to salty and sweet flavours. Which of the following can be most reasonably inferred from the information in the passage?