Fertilization occurs in sexual reproduction, where male and female gametes fuse to form a zygote.

Sexual reproduction involves the combination of genetic material from two parents, leading to genetic variation.

Regeneration is a form of asexual reproduction where an organism can regrow lost parts.

Parthenogenesis is a form of asexual reproduction where the offspring develops from an unfertilized egg.

Covalent network solids are held together by a network of covalent bonds, resulting in very high melting points.

Molecular solids are held together by van der Waals forces.

Iron deficiency causes interveinal chlorosis, where the areas between the veins of leaves turn yellow.

Iron is crucial for chlorophyll synthesis and is involved in various enzymatic reactions in plants.

Sulfur is a key component of certain amino acids, which are the building blocks of proteins.

The average speed of gas molecules is given by the formula v_avg = (8kT/πm)^(1/2), where k is the Boltzmann constant, T is the temperature, and m is the mass of a gas molecule.

The average speed of gas molecules is given by the formula v_avg = sqrt(8kT/πm), where k is the Boltzmann constant, T is the temperature, and m is the mass of a molecule.

According to Archimedes' principle, the buoyant force is equal to the weight of the fluid displaced by the object.

According to Archimedes' principle, the buoyant force on a submerged object is equal to the weight of the fluid displaced by the object.

Capacitance (C) is directly proportional to the area of the plates (A) and the dielectric constant (ε) and inversely proportional to the distance (d) between the plates.

The capacitance (C) of a parallel plate capacitor is given by the formula C = ε₀A/d, where A is the area of the plates and d is the separation between them.

'Survival of the fittest' is a phrase often associated with Darwinism, which emphasizes the role of natural selection in evolution.

'Survival of the fittest' is a phrase often associated with Darwinism, which emphasizes natural selection as a key mechanism of evolution.

'Survival of the fittest' is a phrase often associated with Charles Darwin's theory of natural selection, emphasizing that those best adapted to their environment are more likely to survive and reproduce.

Absolute zero is defined as the temperature at which molecular motion ceases, corresponding to 0 Kelvin.

Absolute zero refers to the lowest possible temperature, at which gas molecules theoretically stop moving, making both A and B correct.

The critical angle occurs when light travels from a denser medium (water) to a less dense medium (air).

The Earth's magnetic field is approximately 1000 times weaker than that of a typical refrigerator magnet.

The efficiency of a Carnot engine is determined by the temperatures of both the hot and cold reservoirs, given by the formula η = 1 - (T_c/T_h).

The electric field (E) between the plates of a parallel plate capacitor is given by the expression E = V/d, where V is the voltage and d is the distance between the plates.

The electric field (E) between the plates of a parallel plate capacitor is given by the formula E = V/d, where V is the voltage and d is the separation between the plates.

The electric field E due to a dipole at a point along the axial line is given by E = (1/4πε₀) * (2p) / r³.

The electric potential (V) due to a point charge (Q) at a distance (r) is given by V = kQ/r, where k is Coulomb's constant.

The electrochemical series arranges elements based on their standard electrode potentials.

The electrochemical series is a list of electrodes arranged by their standard electrode potentials, indicating their tendency to gain or lose electrons.

The energy of a simple harmonic oscillator is maximum at the amplitude, where the velocity is zero and all energy is potential.