Early land animals had to return to the water to reproduce.

The statement ‘Early land animals had to return to the water to reproduce.’ Is true. Their form of living before was based on the use of water as their food source and also, where females lay their eggs. They are called terrestrial animals.

The right answer is True.

Amphibians are the first vertebrate animals to come out of the water to land.

** In frogs and toads, there is mating but external fertilization in water. Indeed, males have rough balls on the legs to be able to hold on to females during mating and deposit their sperm as and when the female is laid. The eggs of the frogs are laid in packs, while the eggs of the toads are laid in ribbon. The females lay a lot of eggs, left alone in the pond, because predators of eggs or tadpoles are numerous in the pond!

The midwife toad male retrieves the ribbon of eggs laid by the female and wraps it around her legs and moves to the hatching eggs.

** In newts, there is no mating. After the courtship, the male deposits the spermatophore (a "sticky" bag containing sperm) in the water, then advances a few steps. The female who follows it, is obliged to stop in such a way that the spermatophore penetrates into her genitals and fertilizes her eggs. There is internal fertilization without mating! Then the female lays her eggs one by one in the pond and lays them gently on leaves that she folds around each egg to protect them.

did you mean: energy is defined ashyperactivitya caloric measurementthe ability to move matterthe ability to think and analyze this form of energy is called "energy in motion" or "energy of moving matter"potential energy kinetic energy electrical energy1 ptlights on a stage can be examples of all of the following forms of energy exceptelectrical energylight energythermal energysound energywhen one type of energy changes to another this is called energy energy is stored based on their position or shape this is called energy.kinetic potential sound electromagnetic

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.