A group of organisms that can breed together to produce fertile offspring.
A group of similar organisms.
The environment in which an organism lives.
Pregunta 2
Pregunta
It is not just the environment that affects the chances of a [blank_start]organism[blank_end] surviving. Organisms are also dependant on other [blank_start]species[blank_end] for their survival. They may depend on other species for food or for their habitat. Many species of insect, for example, have habitats within or on particular [blank_start]plants[blank_end].
In a particular habitat there will be competition between species for resources. [blank_start]Animals[blank_end] may compete for breeding sites or territories, food, mates or living space. Plants may compete for space, [blank_start]light[blank_end], nutrients and water.
A food web shows the feeding [blank_start]interactions[blank_end] of some of the species within a habitat. Because species depend on each other in many ways, any impact on one species within a food web will have a [blank_start]knock-on effect[blank_end] on many of the other species that are part of the same food web. Food webs are extremely useful because they give us a visual representation of [blank_start]interdependence[blank_end].
Respuesta
organism
species
plants
Animals
light
interactions
interdependence
knock-on effect
Pregunta 3
Pregunta
Using the diagram, choose the correct equation for photosynthesis.
carbon dioxide + water (+sunlight) -> glucose + oxygen
oxygen + water (+sunlight) -> glucose + carbon dioxide
glucose + oxygen -> carbon dioxide + water (+sunlight)
Pregunta 4
Pregunta
The efficiency of transfer of energy at each level of a food chain is the ratio of the energy available in the organism's tissues to the total amount of energy the organism has ingested.
percentage efficiency = (energy in tissues/energy in food eaten) x 100
Organisms can be [blank_start]classified[blank_end] in many different ways. In the past, organisms were classified mainly by their [blank_start]appearance[blank_end]. Today, we have a much more [blank_start]accurate[blank_end] way of classifying organisms, based on their DNA [blank_start]sequences[blank_end]. Organisms with more similar DNA are likely to be more [blank_start]similar[blank_end] species. Classifying organisms in this way helps us to see how they [blank_start]evolved[blank_end]. A [blank_start]common[blank_end] ancestor is the most recent individual from which all organisms in a group are descended. Organisms with the most similar DNA have more [blank_start]recent[blank_end] common ancestors than those with [blank_start]less[blank_end] similar DNA.
Respuesta
classified
appearance
accurate
sequences
similar
evolved
common
recent
less
Pregunta 9
Pregunta
Biodiversity is the word used to describe the variety of living things in a habitat.
Respuesta
True
False
Pregunta 10
Pregunta
Define 'Sustainability'.
Respuesta
Finding a way to meet our needs now without stopping future generations from meeting their needs.
Using renewable resources.
Pregunta 11
Pregunta
How can we improve sustainability?
Respuesta
recycle more
use products that need little energy to be produced