Explanation

A plasmid is a small, extrachromosomal, circular DNA molecule that is commonly used as a vector in genetic engineering and molecular biology.

Plasmids are capable of replicating independently of the host cell's genome and can carry genes of interest.

It making them useful for gene cloning, expression, and transfer.

Explanation

Most living things, including animals, plants, and microorganisms, use oxygen (O2) to produce ATP through cellular respiration.

ATP is the primary energy currency of the cell, and it's essential for various biological processes like muscle contraction, nerve impulses, and biosynthesis.

Explanation

A solid has a fixed shape and a definite volume, regardless of its container.

The particles (molecules, atoms, or ions) in a solid are closely packed and have a fixed position, giving the solid its rigidity and shape.

Explanation

Elastic deformation occurs when a material temporarily changes shape in response to an external force, but returns to its original dimensions when the force is removed.

This type of deformation is reversible, meaning the material returns to its original state.

Explanation

• The atomic number 19 corresponds to the element Potassium (K).
• The electron configuration of Potassium is: 1s² 2s² 2p⁶ 3s¹
• Which can be simplified to: 2, 8, 8, 1.

Explanation

• A hypothesis is a proposed explanation for a phenomenon or a problem that can be tested through scientific investigation.
• It is a educated guess that provides a possible answer to a question or problem.
• A hypothesis must be testable and falsifiable, meaning that it can be proven or disproven through experimentation or data collection.

Explanation

• Quantitative observation involves the use of instruments, tools, or equipment to measure and collect numerical data about the world.
• This approach focuses on quantifying properties, such as length, mass, temperature, or time, to describe phenomena accurately.

Examples of equipment used in quantitative observation include:

• Thermometers
• Spectrophotometers
• Microscopes
• Telescopes
• Stopwatches
• Balances

Explanation

Microscopes are instruments designed to produce magnified visual images of small objects or samples.

It allowing us to see details that are not visible to the naked eye.

Explanation

Homologous structures are those that have different functions (physiology) but share similar internal architecture or morphology, indicating a common evolutionary origin.

Examples include:

• Forelimbs of vertebrates (e.g., human arms, bird wings, whale flippers)
• Pelvic bones of different mammals

Explanation

Telescopes are designed to collect and magnify light from distant objects, such as stars, planets, and galaxies.

They are ideal for viewing faint or dim objects in the night sky, as they can gather more light than the human eye alone.