Definitions Bio

Question 1

Define Carry Capacity

Answer 1

The size of the population that can be supported indefinely on the available resources and services of that ecosystem

Question 2

Define a Clade

Answer 2

A group of organisms that contains a common ancestor and all its lineal descendants

Question 3

Define an ecological niche

Answer 3

The role and space of an organism fills in an ecosystem, including all its interactions with the biotic and abiotic factors of its environment

Question 4

Define evolution

Answer 4

Change in the genetic composition of a population during successive generations, which may result in the development of new species.

Question 5

Define a gene

Answer 5

Regions of DNA that are made up of nucleotides; the molecular unit of heredity

Question 6

Define a genome

Answer 6

All the genetic material in the chromosomes of an organism, including its genes and DNA sequences

Question 7

Define a keystone species

Answer 7

A plant or animal that plays a unique and crucial role in the way an ecosystem functions

Question 8

Define Macroevolution

Answer 8

The variation of allele frequencies at or above the level of species over geological time, resulting in the divergence of taxonomic groups, in which the descendants is In different taxonomic group to the ancestor

Question 9

Define microevolution

Answer 9

Small scale variation of allele, frequencies within a species or population, in which the descendants is of the same taxonomic group as the ancestor

Question 10

Define polygenic inheritance

Answer 10

When one characteristic is controlled by two or more genes