Phylum Arthopoda
What are invertebrate animals in the last phylum that you have studied?
Arthropods
Are most Crustaceans aquatic?
Yes, they are. Some can be terrestrial.
Name an Arachnid.
It could be a spider, scorpion, mite or tick.
Are Arthropods segmented? Say the parts in that case.
Yes, the parts are: head, thorax and abdomen.
Are mites and ticks arachnids?
Yes.
Where do Arthropods live?
In the ocean (most of them). Many of them are aquatic animals but some are terrestrial too.
How many pairs of legs do crustaceans have? Say their function.
Five pairs. The first pair are claws to capture food, the rest have got locomotive function.
How many appendages with locomotive function (legs) do Arachnids have?
Four pairs.
What kind of skeleton do Arthropods have?
An exoskeleton (external skeleton that usually can be made of chitin or calcium carbonate).
What is the composition in the crustaceans skeleton?
Calcium carbonate
Are earthworms Arthropods?
No, they are annelids.
How many parts is the body of a crab (for example crayfish) divided into?
Two parts that are cephalothorax and abdomen and also the legs.
What kind of nutrition do spiders have?
They are carnivorous and they breath with book lungs.
What is the general name (the group) for a kind a worm with the trunk divided into segments and multiple pair of legs?
Myriapod (for example centipede and millipede)
Millipedes have how many legs on each body segment?
And what about centipedes?
Two.
Only one pair on each segment.
Name two subphylums of Arthopods.
Crustaceans, Arachnids, Myriapods and Insects
Insects
In what group of invertebrates do you organise lice?
Artrhopods--> Insects
How does an Arthropod grow? What is necessary to do in orden to grow up?
It grows by shedding its exoskeleton. They suffer shedding to renovate the shed and to grow up.
Did insects evolve from Arthropods?
Yes.
Name three types of Crustaceans.
They include shrimps (prawns), lobsters, crabs, crayfish, barnacles.
What do the pedipalps of an Arachnid help with?
They have sensory function. They help for eating or holding food.
What is the process that undergo many insects throughout life in which they change their body shape from birth to adulthood?
It's called metamorphosis.
How can ocelli be? Describe the different types
They can be simple or compound. The simple ocelli capture ligth and the compound ones detect movements.