Archivo de la categoría: biology

Specialisation of cells

Our biology teacher, Male Ravagnan gave us an activity. We had to look for images of different specialised cells. I worked with Agostina Alday and here is our work!

CILIATED CELL: It has cillium (tiny hairs) to protect our respiratory system.

ROOT HAIR CELLS: It increases the surface area for absorption.

XYLEM VESSELS: It has a thick cell wall to support the plant.

PALISADE MESOPHYLL CELL: It’s full of chloroplasts because it has a major role in photosynthesis.

NERVE CELLS: The Axon of the nerve cell is used to transmit the information in the form of electrical impulses.

RED BLOOD CELLS:   The cells have no nucleus, leaving more space for haemoglobin, and they are very flexible (they can be forced through even the narrowest of blood vessels).

SPERM CELLS:   It has a long tale called Flagellum which allows the cell to move to swim to the female reproduction system. It’s neck is full of mitochondria to give energy so that the flagellum can move.

EGG CELLS:  It has a light jelly layer outside the membrane to protect the cell.

 

Classification of living organisms

Our teacher Magdalena Ravagnan gave us a task. We had to work on the different living organisms. I worked Agostina Alday and Delfina Nicora. Here is our work!

1) Construct a table to compare the characteristic features of animals, plants, fungi, protoctists and prokaryotes: number of cells, differences in the cell structure, nutrition. You can upload the activity as a PDF file on your blog.

TABLE!

 

2) Create an infographic showing the external features only of the following animals. Make it visual,  so choose any animal which represents the class. For e.g. from the class reptiles, snake.

Infographic

 

Here are the other infographics my partners made that will help me to study!

VERTEBRATES
Group 1: Mammals: Anania T. and J. Lutowicz
Group 2: Birds: Monguzzi N., Perez Muñiz L. and Catani J.
Group 3: Reptiles: V. Ávila G. and Mosquera F.
Group 4: Amphibians: Olaizola B. ans Venini J.
Group 5: Fishes: Segura A., Araya F. and Roggero L.

ARTHROPODS

Group 6: Insects: Miy Uranga D., G. Fernandez L. and Hartmann R.
Group 7: Crustaceans: Borda T. and Ripoll M.
Group 8: Arachnids: Rela C., Alday A. and Nicora D.
Group 9: Myriapods: Santayana D., Grosso C. amd Giambruni L.

Living Organism: Beetle

 

Since in biology we have been studying about the living organisms and their characteristics, our teacher Male Ravagnan gave us a task. We had to choose an organism, illustrate it and label it. The last task was that we had to investigate to what class, specie and gene it belonged to. This last task was related to our last topic seen: The bionomial sistem. Here is our work! (I worked with Nico Monguzzi)

BEETLE
IMG_20150310_131452678IMG_20150310_131438085IMG_20150310_132600

Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Hexapoda
Class: Insecta
Subclass: Pterygota
Infraclass: Neoptera
Superorder: Endopterygota
Order: Coleoptera

source: www.wikipedia.com

Characteristics of living organisms

Male Ravagnan, our Biology teacher, gave us a TASK. We started to learn about the living organisms and the 7 characteristics they must have. Here is my work 🙂

A) Post a picture with at least two of the characteristics of living organism.sun_and_sunflower2sunflower1

In this images we can see two very important characteristics: sensitivity and movement.

B) Name and define them

Sensitivity is the ability to detect and respond to changes in the environment and movement is an action by an organism causing a change of position or place. Sunflowers have sentivity because they detect and respond to changes in the enviroment such as the sun. When the sun moves, they move, looking at the sun so they can receive nutrients from it. Also, movement is in this process, because if they didn’t move they couldn’t get enough sun and nutrients.

C) List the other characteristics which are not shown in the picture.

  1. Respiration: as the chemical reactions in cells that break down nutrient molecules and release energy.
  2. Growth: as a permanent increase in size.
  3. Reproduction: as the processes that make more of the same kind of organism.
  4. Excretion: as removal from organisms of toxic materials and substances in excess of requirements.
  5. Nutrition: as taking in of materials for energy, growth and development.

IGCSE Biology syllabus

This year, we are having a new subject: Biology. In biology we prepare ourselves for the International General Certificate of Secondary Education (IGCSE) which is an exam where we must study specific content. As not all the years the same content is tested, the university of Cambridge provides us with the content. HERE is what we are going to be tested on. This file is called “Syllabus”. Have a look!