Cyclohexane is a cyclic hydrocarbon with a ring structure.

The kingdom Animalia is defined by multicellular and heterotrophic organisms.

Mollusca includes soft-bodied animals, many of which have a hard shell for protection.

Food availability is a density-dependent factor because its effect on population growth changes with population density.

All of the above options are direct threats to biodiversity, affecting species and ecosystems.

Asexual reproduction lacks genetic variation, which can make populations more vulnerable to diseases and environmental changes.

HIV/AIDS is caused by the Human Immunodeficiency Virus (HIV), which is a virus.

All of these factors influence the rate of transpiration in plants.

Algae are primarily characterized by their ability to perform photosynthesis using various pigments, but they do not have true roots or vascular tissues.

Angiosperms are characterized by producing seeds, having vascular tissues, and producing flowers.

Dicots are characterized by having two cotyledons and net-like venation in their leaves.

Dicotyledons are characterized by having two seed leaves (cotyledons) and net-like venation in their leaves.

Monocots are characterized by having parallel leaf venation and one cotyledon.

Prokaryotic cells have circular DNA and lack a true nucleus.

Sexual reproduction involves two parents and results in genetic variation among offspring.

Plants have cell walls made of cellulose and are primarily autotrophic.

Living organisms exhibit complex organization, which is a key feature of life, distinguishing them from non-living entities.

Annelids, such as earthworms, are characterized by their segmented bodies.

Echinoderms exhibit radial symmetry and have a calcareous endoskeleton.

Porifera, or sponges, are characterized by their porous bodies that allow water to flow through.

Viruses can only reproduce inside host cells, as they lack cellular structure and metabolism.

Cutting is a method of vegetative propagation where a part of a plant is used to grow a new plant.

Cytokinins stimulate lateral bud growth and delay leaf senescence.

Plasma is the liquid component of blood that carries nutrients, hormones, and waste products throughout the body.

The primary function of the respiratory system is gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled.

Mass is a fundamental quantity in the SI system.

Bt cotton is a genetically modified crop that has been engineered to express a bacterial protein that is toxic to certain pests.

Carbon dioxide is a greenhouse gas that contributes to the greenhouse effect and global warming.

The Modern Synthesis integrates natural selection with Mendelian genetics, providing a comprehensive explanation of evolution.

Neodymium (Nd) is a member of the lanthanide series.