Archivos de la categoría practical skills

Classification of living organisms by Tomas Braun and Bautista Buljevich

 

Verbrates

  • Vertebrates is one of the two phyla from the kindom animalia. The animals that belong to this phylum are characterized by their internal characteristics that separate them from the invertebrates: they have a backbone.
  • Vertebrates have a skeleton which is formed by bones. They also have a backbone formed by little bones in the back called vertebrae. This gives vertebrates the posibility to be flexible and to do certain moves. The entire body is separated into three parts:head, torso and limbs (arms and legs)
  • Vertebrates are clasified into five groups called classes. These are the Mammals, Reptiles, Birds, Fish and Anphibians:

Mammals:

-They have hair
-They have different types of teeth (incisors, canines, premolars and molars)
– They, all, have a diaphragm
– They are endothermic
– They have planceta
– Their heart has four chambers
– Young feed on milk from mammary glands
-They live on land
-They mobilize by walking, swimming, flying, jumping and, when it is necesary, running
-They give birth after having them in their uterus for some time, depending on their size
-Their heart has four chambers

Fish:

-They have scaly skin
– They have fins
-They have gills instead of lungs
-They live on water
-They mobilize swimming
-They lay eggs

Reptiles:

-They have scaly skin
-They lay eggs with soft shells
-They mobilize by crawling, walking and swimming.
-They live on land

Birds:

-They have feathers all around their body
-They have wings
-They lay eggs with strong shells
-They are endotheric
-They have a bick
-Their heart has four chambers
-They mobilize by flying
-They live on high places

Anphibians:  -They have a moist, soft skin
-They lay eggs in water, the larva lives in water
-They usually live on land, but they also can live on water
-The larva has gills, the adult has lungs

Invertebrates

  • Invertebrates is the other one of the two phyla of the kindom animalia
  • They don’t have bones
  • They are oviparous
  • They are clasified into six groups:

Sponges

Jellyfish

Corals

Worms

Mollusks

Echinoderms

Arthropods:
-Of every 100 animals that exist, 80 are arthropods
-They have an external skeleton called cuticle
-They have jointed legs
-They are divided into four groups depending on the number of their legs:

Insects:
-They have an exoskeleton
-They have three pairs of jointed legs
-They breath through tracheae
-They can have wings
-The mobilize by flying and walking
-They have a head, a torax and an abdomen

Arachnids:
-They live on land
-It has four pairs of jointed legs
-They breathe through their “book lungs”, which are gills
-They mobilize by walking

Crustaceans:
-They breathe through gills
-They live in wet places
-They have more than four pairs of jointed legs
-They are not centipedes or millipedes

Myriapods:
-Their are centipedes ans millipedes
-Their body consists of different parts
-They have more than ten jointed legs

Monocots and Dicots

In this table, we can see the difference between a monocot and a dicot:

 

 

Monocots Dicots
Seed 1 cotyledon 2 cotyledon
Flower parts Multiples of 3 Multiples of 4 or 5
Leef Paralleled veined Netted (like a net)
Stem Scattered vascular bundles To the side of the stem (vascular bundles)