A land breeze blows when the air above land is ___________ and the air above sea is ____________.
A Colder, Warmer
B Warmer, Lighter
C Heavier, Colder
D Warmer, Colder
its not mentioned during day or night in the question.so r we supposed to assume its night?
Three organisms possess some of the characteristics shown in the chart below. An X indicates the characteristic that is present. Which statement best describes these organisms?
AA could be an alga, B could be an Amoeba, and C could be a Paramecium
BA could be a plant, and B and C could be coelenterates
CA could be a yeast, and B and C could be bacteria
DA could be a moss, B could be a Hydra, and C could be an earthworm
Small populations of three types of organisms X, Y and Z were kept in captivity. Plenty of plants were present in that area.
The change in the population of these organisms with time was plotted in the graph as shown here.
Which of the following conclusion is incorrect regarding their eating habits?
A X could be a carnivore that feeds on Z but not on Y.
B Both X and Y could be herbivores and Z could be a carnivore whose population declines as it does not prey on both X and Y.
C If X and Y are herbivores, then X has higher reproductive potential than Y.
D None of these
Refer to the given diagram and select the correct option regarding it.
A X – Rubber, Y – Plastic
B Z – Wood, X – Cardboard
C Y – Sponge, X – Rubber
D Z – Glass, X – Paper
How can pape
Which of the following adaptations peculiar to the polar bear are structural adaptations?
P : Hibernating during cold
Q : Having a thick coat of fur
R : Having stiff hairs on the underside of its feet
S : Having a layer of fat under the skin
(A) P and Q
(B) Q and R
(C) P, Q and R
(D) Q, R and S
Sound waves travel at 350 ms-1 through warm air and at 3500 ms-1 through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
ADecrease by a factor 10.
BIncrease by a factor 20.
CIncrease by a factor 10.
DDecrease by a factor 20.