Biodiversity of animals

Question 1

what is biodiversity

Answer 1

a wide range of animals

Question 2

how do scientist classify different animals

Answer 2

according to how their bodies arecreated.Each animal has abody planthat is explained by the evolution of the animal.

Question 3

what is a Phylum

Answer 3

a scientific term that groups related organisms based on their fundamental characteristics. Animals withsimilar body plans

are put into thesame phyla

Question 4

what are some common features used to classify animals

Answer 4

1. Symmetry
2. Cephalisation
3. Embryonic tissue layers
4. Development of a coelom
5. Number of gut openings
6. Blood systems

Question 5

what is symmetry

Answer 5

Symmetry is how similar and repetitive parts of an animal arearranged.

Question 6

what are the three parts of symmetry

Answer 6

1. Asymmetry
2. Radial symmetry
3. Bilateral symmetry

Question 7

what is Asymmetry

Answer 7

A fewsimple animalsareasymmetrical. In other words, the body is a group of cells withno particularpattern. Sea sponges are an excellent example of an asymmetrical animal. Asymmetrical animals show the following characteristics:

• Irregularly shaped
• Simpleorganisms
• Sedentary, they do not move and occupy the same space during an entire lifetime
• Usually,filter feeders
• Lack sensory organsas they do not actively seek food

Question 8

what is Radial symmetry

Answer 8

Radial symmetrymeans that thebody can be divided intotwo equal partsin several differentplanes. Animals with radial symmetry have acircular planethat does not have a front or a back, nor left or right side. Radial symmetry is found in animals thatdo not moveormove very littlebut can sense things in their environment around their entire body. Features of radial symmetry are:

• Organisms are usuallysedentary
• Organisms havedeveloped basic sensesto be aware of their immediate surroundings for feeding
• Capturing/obtaining foodcan occur over a360° radius

Question 9

what is Bilateral Symmetry

Answer 9

The human body has bilateral symmetry. This means that the human body can be divided intotwo identical halvesin only one plane. The two halves aremirror imagesof each other. Animals with bilateral symmetry have a distinct front and back and a distinct right and left side. Animals that move around have bilateral symmetry, with the primary senses gathered near the front so the animal can sense food, danger and direction. Features of bilateral symmetry are:

• The body plan showstwo halves
• Organisms aremobile
• Greatcephalisation(formation of a ‘head’) concentratessense organsto make detecting prey and danger etc., much easier