56 results found

Search Results for: population growth

Population Growth and Survivorship

By: Maria Victoria Gonzaga Previously, we learned about biodiversity and endemism. Now, let's look at the... Read More

Carrying capacity

Carrying Capacity Definition What is carrying capacity? In biology and environmental science, the carrying capacity of a... Read More

Limiting factor

Limiting factor in biology refers to any of the factors (variables) in an environment capable of limiting a process, such as... Read More

Population

Reviewed by: Jonathan Cumming, PhD Definition noun, plural: (genetics, ecology) A group of organisms of one... Read More

Fecundity

Fecundity Definition The meaning of fecundity is the reproductive rate (fecundity rate) or the performance of an individual... Read More

Natural selection

Natural Selection Definition What is natural selection in biology? Natural selection is defined as a process in nature... Read More

Density dependence

Definition noun (population ecology) An effect in which the intensity changes with the increasing population density, e.g.... Read More

Sympatric speciation

Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... Read More

Null hypothesis

Null Hypothesis Definition Null hypothesis is defined as “the commonly accepted fact (such as the sky is blue) and... Read More

Community Patterns

By: Maria Victoria Gonzaga In the previous lesson, we learned what a population is, its attributes, and processes... Read More

Fluctuation test

Fluctuation test (Science: investigation) test devised by Luria and Delbruck to determine whether genetic variation in a... Read More

Living things

Living Things Definition A living things pertains to any organism or a life form that possesses or shows the... Read More

Human

Definition noun plural: humans hu‧man, (h)yo͞omʹn A bipedal primate belonging to the genus Homo, especially Homo... Read More

Biosphere

What is biosphere? The biosphere is that part of the Earth where living things thrive and live. It is the portion of the... Read More

Biosecurity and Biocontrol

By: Maria Victoria Gonzaga In the previous lesson, we learned about the importance of modern science... Read More

Allee effect

The Allee effect is a phenomenon in biology characterized by a correlation between population size or density and the mean... Read More

Ecosystem

Ecosystem Definition An ecosystem is a system consisting of biotic and abiotic components that function together as a unit.... Read More

A Look Into Natural Selection and its Mechanisms

Charles Darwin is credited with outlining the fundamentals of evolution. He was a smart and eager pupil and protégé,... Read More

Asexual reproduction

Asexual Reproduction Definition What is asexual reproduction? Asexual reproduction is a mode of reproduction that does not... Read More

Arthropod

Arthropod Definition What is an arthropod? An arthropod is an invertebrate living organism characterized by the presence of... Read More

Exponential growth

Definition noun A growth in which the rate is proportional to the increasing number or size in an exponential (rather than... Read More

Density dependent factor

Definition noun, plural: density dependent factors (ecology) A factor whose effects on the size or growth of population vary... Read More

Demographic transition

Definition noun A concept in demography that elucidates the transition from high to low birth and death rates as a country... Read More

Fragmentation

Fragmentation Definition What is fragmentation? In general, fragmentation refers to the state or the process of breaking... Read More

Cell growth

Definition noun (1) The increase in cytoplasmic volume, as in cell development and cell reproduction. (2) The increase in... Read More

Density dependent limiting factor

Definition noun A limiting factor of a population wherein large, dense populations are more strongly affected than small,... Read More

Inbreeding depression

Definition noun, plural: inbreeding depressions The loss of vigour or the reduced biological fitness in a particular... Read More

Biology

Biology Definition Biology is the branch of science that primarily deals with the structure, function, growth, evolution,... Read More

Freshwater Communities & Plankton

Plankton are microscopic organisms that live suspended in the water environment and form a very important part of the... Read More

Northern Africa and biodiversity

Northern Africa and biodiversity Content Partner: United Nations Environment Programme (other articles) Article Topics:... Read More

Primary succession

Primary succession definition Primary succession is an ecological succession where a newly formed area is colonized for the... Read More

Environment

Environment Definition What does environment mean? If you mean physical environment, then it is defined as the surrounding... Read More

Gamete

Definition of Gamete What is a gamete? A gamete is the mature reproductive or sex cell that contains a haploid number of... Read More

New Zealand’s Unique Flora

By: Maria Victoria Gonzaga In the previous lesson, we've come to know some of the most fascinating endemic... Read More

Smooth endoplasmic reticulum

Smooth Endoplasmic Reticulum Definition Smooth endoplasmic reticulum (sER) is (a part of) endoplasmic reticulum that is... Read More

Growth rate

Growth rate (Science: biology, cell culture, Ecology) The rate, or speed, at which the number of organisms in a population... Read More

Flow cytometry

Flow cytometry (Science: technique) flow cytometry is an emerging technique which holds great promise for the separation,... Read More

Biotic potential

Biotic potential (Science: biology, ecology) The potential growth a population of living things can expect if it were living... Read More

Axenic culture

Definition noun A microbial culture that contains only one species, variety, or strain of... Read More

Selective Breeding

Reviewed by: Mary Anne Clark, PhD Thousands of years before Darwin proposed evolution by natural selection and... Read More