1 1 characteristics classification and features of organisms

The G in MRS GREN stands for growth.

The two Rs in MRS GREN stand for reproduction and respiration.

Sensitivity refers to an organism's ability to detect and respond to stimuli in its environment.

Movement is any action causing a change in position or place by an organism.

Traditional classification makes use of the structural characteristics of living organisms, e.g. body shape and internal anatomy.

False. The binomial naming system uses genus and species.

The name *Canis lupus *tells us that wolves belong to the *genus Canis ***and the species lupus.

A species is a group of organisms that can reproduce to produce fertile offspring.

A dichotomous key is a key used to identify organisms based on a series of questions about their features. It leads the user through to the name of the organism by giving two descriptions at a time and asking them to choose.

False. In a dichotomous key you need to follow the statements from the beginning to successfully identify an organism.

Classifying organisms on the basis of evolutionary relationship means grouping organisms on the basis of shared common ancestry; organisms with more recent common ancestors are grouped more closely than those with more distant common ancestors.

DNA sequencing technology means that organisms can be classified on the basis of their DNA base sequences rather than on the basis of their observable characteristics.

True. The more recent the common ancestor, the more DNA base sequences the organisms will have in common.

True. Mammals are more closely related to other mammals than to any other vertebrate group, so their DNA base sequences will be more similar to each other than to those of any other group.

The main features used to classify animals into the animal kingdom include:

True. All animals are multicellular organisms.

False. Animal cells do not contain chloroplasts.

The main features used to classify plants into the plant kingdom include:

Vertebrates are animals that have a backbone.

The main groups of vertebrates are:

The main features of mammals include:

Arthropods are invertebrates with jointed legs.

The main groups of arthropods are:

Crustaceans have:

The five kingdoms are:

Features of fungi are:

Protoctists are unicellular or multicellular organisms with a nucleus. Some may have cell walls and chloroplasts while some do not, and some can photosynthesise while others feed on organic substances.

Features of prokaryotes include:

False. Some plants, like ferns, reproduce by spores instead of flowers and seeds.

Two differences between monocotyledonous and dicotyledonous leaves are that:

The key difference between the flowers of monocotyledonous and dicotyledonous plants is that monocotyledonous flowers have petals in multiples of 3, while dicotyledonous flowers have petals in multiples of 4 or 5.

A virus consists of genetic material (RNA or DNA) inside a protein coat.