Red blood cells contain hemoglobin, which binds to oxygen and transports it throughout the body.

The primary component of natural gas is methane (CH4).

Plasma is composed of approximately 90% water, which serves as a solvent for various substances in the blood.

Phospholipids are the primary component of cell membranes, forming a bilayer.

The cell wall of plant cells is primarily made of cellulose, providing structural support.

Cellulose is the primary component of the cell wall in plants, providing structural support.

The Earth's crust is primarily composed of oxygen, which combines with silicon to form silicate minerals.

The Earth's crust is primarily composed of basalt (oceanic crust) and granite (continental crust).

The inner core is primarily composed of solid iron, along with some nickel.

The outer core is primarily composed of liquid iron and nickel, which is crucial for generating the Earth's magnetic field.

The passage discusses the negative effects of social media, particularly its role in spreading misinformation and contributing to feelings of isolation among users.

The primary criterion for classifying organisms into different kingdoms is cell structure, distinguishing between prokaryotic and eukaryotic cells.

Gases are highly compressible while liquids are not, due to the distance between particles in each state.

The primary difference is that chemisorption involves the formation of chemical bonds, while physisorption involves weaker van der Waals forces.

Solids have a fixed shape and volume due to closely packed particles, while liquids take the shape of their container but have a fixed volume.

The primary disadvantage of a general partnership is that partners have unlimited personal liability for business debts.

The primary disadvantage of a partnership is that partners have unlimited liability for business debts.

Physisorption is primarily driven by weak van der Waals forces.

-CN exhibits a -M effect as it withdraws electron density through resonance.

Cortisol has multiple effects including increasing blood sugar levels, decreasing inflammation, and regulating metabolism.

Deforestation leads to the loss of habitat for many species, contributing to biodiversity loss and ecosystem degradation.

Parathyroid hormone (PTH) increases calcium levels in the blood by promoting the release of calcium from bones and increasing absorption in the intestines.

The -COOH group primarily exhibits a -M effect as it withdraws electron density through resonance.

-COOH exhibits a -M effect as it withdraws electron density through resonance.

The inductive effect involves the shifting of electron density through sigma bonds, which stabilizes positive charges.

The inductive effect involves the shifting of electron density through sigma bonds, which can stabilize positive charges.

Creatine phosphate provides a rapid source of energy for muscle contraction during short bursts of activity.

ATP (adenosine triphosphate) is the primary energy source for muscle contraction.

Urea is the primary excretory product formed from the breakdown of proteins in the liver and is excreted by the kidneys.

Urea is the primary nitrogenous waste product excreted by humans, formed in the liver from ammonia and carbon dioxide.