Which one of the following is NOT a component of conducting tissue in plants?
Fibres
Tracheids
Pericycle
Sieve tubes
Which one of the following cell organelles does NOT possess nucleic acid?
Nucleolus
Chloroplast
Ribosome
Plasma Membrane
Which one of the following cell organelles does NOT possess its own genetic material encoding proteins?
Ribosome
Nucleus
Mitochondria
Chloroplast
A.
Ribosome
Ribosomes are the molecular machines responsible for protein synthesis. It’s made out of RNA and proteins, and each ribosome consists of two separate RNA-protein complexes, known as the small and large subunits.
Which one of the following organisms has vascular tissues?
Cladophora
Penicillium
Marsilea
Anabaena
Which one of the following organisms represents the primary consumer category in an ecosystem?
Caterpillar
Crabapple tree
Frog
Sparrowhawk
Spring tides refer to:
Greatest difference in the sea level at high and low tides.
Lowest difference in the sea level at high and low tides.
No difference in the sea level at high and low tides.
Counteraction of gravitational pull of the Sun to that of Moon.
Which one of the following energy is stored in the links between the atoms?
Nuclear energy
Chemical energy
Potential energy
Thermal energy
The light energy escaping from the Sun can be spread by:
A shower of rain drops
A plane mirror
A convex lens.
A combination of a convex lens and a concave lens.
The correct sequence of energy transfer that occurs when an apple falls to the ground is:
Gravitational potential energy → heat energy to air → kinetic energy → heat energy to ground and apple → sound energy.
Gravitational potential energy → sound energy → kinetic energy → heat energy to air → heat energy to ground and apple.
Gravitational potential energy → kinetic energy → heat energy to air → heat energy to ground and apple → sound energy.
Gravitational potential energy → kinetic energy → sound energy → heat energy to air → heat energy to ground and apple.
Which one of the following minerals is used as a fuel in nuclear power stations?
Bauxite
Quartz
Feldspa
Pitchblende