Elias Ntezimana

Homeostasis

Jul 02, 2026 Elias Ntezimana

Homeostasis is the ability of a living organism to maintain a stable internal environment despite continuous changes in the external environment.

Biological Interactions and Relationships

Jul 02, 2026 Elias Ntezimana

Biological interactions and relationships are the various ways in which living organisms interact with one another within an ecosystem.

LICHEN

Jul 02, 2026 Elias Ntezimana

Lichens are unique living organisms formed through a close symbiotic relationship between a fungus and a photosynthetic partner, which is either a green alga or a cyanobacterium

Earthworm

Jul 02, 2026 Elias Ntezimana

An earthworm is a soft-bodied invertebrate animal that lives mainly in the soil. It belongs to the phylum Annelida and plays a crucial role in maintaining soil fertility and ecosystem health.

The endocrine system is a network of glands that produce and release hormones directly into the bloodstream. Hormones are chemical messengers that regulate and coordinate many important body functions

The Endocrine System

Jul 02, 2026 Elias Ntezimana

The endocrine system is a network of glands that produce and release hormones directly into the bloodstream. Hormones are chemical messengers that regulate and coordinate many important body functions. They help maintain communication between different organs and ensure that the body functions properly

Sexually Transmitted Infections (STIs)

Jul 02, 2026 Elias Ntezimana

Sexually transmitted infections (STIs), also known as sexually transmitted diseases (STDs), are infectious diseases that are mainly spread through sexual contact

Myopia

Jul 02, 2026 Elias Ntezimana

Myopia, also known as short-sightedness or near-sightedness, is a common eye disorder in which a person can see nearby objects clearly but distant objects appear blurred. It occurs when light rays are focused in front of the retina instead of directly on i

The Theory of Darwin (Theory of Evolution)

Jun 29, 2026 Elias Ntezimana

The theory of Darwin, also called the theory of evolution by natural selection, was proposed by Charles Darwin in the 19th century

Ontogenesis

Jun 29, 2026 Elias Ntezimana

Ontogenesis (also called ontogeny) is the process by which an organism develops from a fertilized egg (zygote) to a fully grown adult.

Seed Dispersal (Dissemination)

Jun 29, 2026 Elias Ntezimana

Seed dispersal, also called dissemination, is the process by which seeds are spread away from the parent plant to different locations

Pollination

Jun 29, 2026 Elias Ntezimana

Pollination is the reproductive process in flowering plants in which pollen is transferred from the anther (male part) to the stigma (female part)

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