SECOND WEEK

GOOD MORNING EVERYONE!

This week Dr. Parameswari starts the class by asking us to write our answer from the previous activity on the whiteboard about natural selection and new technology of evolution. Can you just imagine how I feel? My heart beats so fast because I did not manage to answer all of the question. Luckily my name not being called by Dr. But this make me realize that I need to prepare well before the class because anything could happen during class. Here is a video of natural selection.

What can be conclude is natural selection can be defined as the process by which random evolutionary changes are selected for by nature in non randomly way. With descent with modification, natural selection can cause a population to evolve for fitness within a given environment over multiple generations.

Next, we are told to form a group and I got a same group with Hanis, Yenni and Syazwan. Please be nice to me guys!

New topics for this week is Introduction to Origin of Life. I have ever wondered three things:

How did Earth begin?

What is the Big Bang Theory?

When did Earth form?

Mayber this video may help.

And from Prebiotic Broth Hypothesis, propose that organic molecules formed near Earth's surface:

Now that we have an idea of what Earth may have looked like, let's take a look at what steps scientists have hypothesized led to early life. It is agreed by scientists that there are four main stages to how life came from non-living things.

The first step is that small organic molecules such as amino acids that make proteins and nucleotides that make DNA. While these organic molecules are found in living things.

The second step is that these small organic molecules joined together to form larger molecules. The small molecules are called monomer since they are made of just one unit. However, when they join together creating polymers that have many repeating units. 

The third step of early life on Earth is when things start to get a little tricky. The polymers that were formed from the monomers grouped together to form protobionts. Protobionts are very important to understanding early life. The name protobionts literally means 'early form of life,' but they are basically small droplets with membranes that are able to maintain a stable internal environment. They are similar to the cells with which we are familiar in that they can reproduce, metabolize, and even respond to their environments.

The fourth step is that these simple protobionts evolved to pass on genetic information. Protobionts are capable of replicating. However, cells are the basic unit of life which unique in that they can reproduce and pass on genetic information from one generation to the next, metabolize matter and energy, and can evolve. These simple cells were created from complex molecules that were created from simple molecules, then continued to evolve into a variety of life forms.

Clear enough right how life form on earth? 

Next, we also learn on taxonomy. Learning it help me remember the organism and communicate clearly about it identity. besides, it is also help in finding the similarities of two different species of animal but in the same genus, for example this two big cats, lion (Panthera leo) and tiger (Panthera tigris). The similarities are they both hunter. For the name, genus name must be capitalized and species name must be lowercase. 

There are classified in many ways:

1) Form, colour, size, chemical structure and genetic make up.

2) Molecular similarities, proteins, DNA and genes. 

That's all. Thank you!