Ribosomes are the sites of protein synthesis, where mRNA is translated into polypeptides.

Stomata are responsible for gas exchange in plant leaves.

Stomata facilitate gas exchange, allowing oxygen and carbon dioxide to enter and exit the plant.

Tendons connect muscles to bones, facilitating movement when muscles contract.

The bladder serves as a storage organ for urine before it is expelled from the body.

The myelin sheath insulates axons and speeds up signal transmission.

Spindle fibers attach to kinetochores and help separate sister chromatids during mitosis.

The xylem is responsible for transporting water and minerals from the roots to the rest of the plant.

tRNA (transfer RNA) brings the appropriate amino acids to the ribosome during protein synthesis.

Water provides electrons during the light-dependent reactions of photosynthesis.

Phototropism is the growth response of a plant to light.

The epidermis is the outer protective layer of a plant.

The process of urine formation involves filtration, reabsorption, and secretion, but the term specifically refers to the initial filtration.

Residual volume is the amount of air that remains in the lungs after a person has exhaled forcefully.

The 9/11 Terrorist Attacks occurred on September 11, 2001, leading to significant changes in U.S. foreign policy.

The cerebellum is responsible for balance and coordination.

The S phase is where DNA replication occurs, resulting in the duplication of chromosomes.

Photosynthesis is the process by which plants convert sunlight into chemical energy.

The INF Treaty, signed in 1987 and effective in 1991, aimed to eliminate intermediate-range nuclear missiles.

Severe DNA damage can trigger apoptosis to prevent the propagation of damaged cells.

Adipose tissue is a type of connective tissue that stores fat and provides insulation and energy reserves.

Simple columnar epithelium is specialized for absorption and secretion, commonly found in the intestines.

A point mutation involves a change in a single nucleotide in the DNA sequence.

A point mutation is a change in a single nucleotide, which can affect protein function.

Thymine is not found in RNA; instead, uracil is used in its place.

Emphysema is a condition characterized by the destruction of alveoli, which impairs gas exchange.

Asthma is characterized by inflammation and narrowing of the airways, causing difficulty in breathing.

Proteinuria is the condition characterized by the presence of excess protein in the urine, often indicating kidney damage.

China is one of the five permanent members of the UN Security Council and holds veto power.

The United States was the first country to recognize South Sudan's independence on July 9, 2011.