Explanation

The Paleozoic Era was a time of significant diversification of life, marked by the Cambrian Explosion, during which many major groups of animals first appeared in the fossil record.

Explanation

• An Exothermic Reaction is a chemical reaction that releases or gives off heat, often accompanied by light, sound, or other forms of energy.
• This type of reaction involves a decrease in the system's energy, which is released into the surroundings as heat.

Explanation

• Meiosis is a type of cell division that occurs in spore-producing organisms, such as plants and fungi, to produce spores.
• In meiosis, a diploid spore mother cell (sporocyte) undergoes two successive cell divisions (meiosis I and meiosis II) to produce four haploid spores.

Explanation

Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Sunlight and wind, for example, are such sources that are constantly being replenished.

Explanation

Invertebrates are animals that do not have a backbone or spinal column. This group includes:

• Insects
• Arachnids (like spiders and scorpions)
• Crustaceans (like crabs and lobsters)
• Mollusks (like squids and octopuses)
• Echinoderms (like starfish and sea urchins)
• Worms

Explanation

Reverse osmosis is a water purification process

that uses a partially permeable membrane to remove ions,

unwanted molecules and larger particles from drinking water.

Explanation

Red blood cells (RBCs) are primarily responsible for transporting oxygen from the lungs to various tissues in the body.

They contain a protein called hemoglobin, which binds to oxygen molecules, facilitating their transport.

Explanation

Cytosine does not form a bond with adenine because its hydrogen bond donors and acceptors are not complementary.

Cytosine typically forms three hydrogen bonds with guanine, whereas adenine forms two hydrogen bonds with thymine.

The patterns of hydrogen bonding in cytosine and adenine do not match, preventing the formation of a stable pair.

Explanation

• An atom is the smallest particle of an element that retains the properties of that element.
• It is the smallest unit of a chemical element, and it cannot be broken down into smaller particles.

Explanation

"Polytities" is not a valid or recognized sound made by monkeys.

Monkeys make various vocalizations like screeching, chattering, or howling, but not "polytities".