Biology Reflection+Questions

Biology

SUMMARY AND QUESTIONS

By Rocco PAris Dance maynard

Questions:

How are you feeling about the class?

The class this year is and will be great since we are around 9 people so there are less interruptions and your explanations are good, so far the content doesn’t seem to be a lot. The only complaint I have is that we may be doing too much. Now, what do I mean by that? Well, since we have 2 classes first thing in the morning at the end of the week, we will find it harder and it will seem like more work to do in said class rather than in comparison to a class on a Tuesday in the middle of the day.

What can we do differently?

What we can do differently could be to make the class less work oriented and do more group projects so that our grade doesn’t all count on a test. Another thing would be to do less of the unit on the thursday and friday classes.

What are you happy about?

In the class I'm happy that there are less people in class (and a nice group of people) and that the explanations are good.

A BRIEF SUMMARY OF THE UNIT

Cells are the basic and smallest units of life and we are made up of billions of them, we know that they are alive by their ability to do metabolism and replication. 2 types of living beings with cells: Unicellular (with only 1 cell) and Multicellular (with multiple cells).

All cells have Cytoplasm (the fluid in cells), DNA, Ribosomes and a cell membrane (the wall keeping everything in the cell). They are usually 1 to 100 μm in size. All cells have organelles which are like the cell's organs, they are responsible for a variety of cellular functions like producing energy.

There are also two types of cells: Eukaryotic: the DNA is surrounded by a membrane Prokaryotic: the DNA is just floating about.

Prokaryotes are the tiny single-celled organisms that include bacteria and archaea, and they don’t have a nucleus or any membrane-bound organelles. They’re smaller and simpler than eukaryotic cells. Prokaryotes also have their own special cell walls, flagella to help them move, and structures like fimbriae for sticking to surfaces and pili for swapping genetic material. On the flip side, eukaryotes, which cover plants, animals, fungi, and protists, come with larger, more complex cells that have membrane-bound organelles, including a nucleus.

LAst Part

The size of a cell plays a big role in how well it can balance surface area (for exchanging nutrients and gases) with volume (for all its metabolic activities), and smaller cells tend to keep that balance in check. Interestingly, humans have about the same number of human cells as bacterial cells; most of these bacteria are harmless or actually beneficial, helping us with digestion and our immune system, although some can make us sick.

Prokaryotes can live in all sorts of environments, even in extreme conditions like really high temperatures, thanks to their specialised cell structures. They’ve got all kinds of metabolic tricks up their sleeves: some can take nitrogen from the air and turn it into a form that plants and animals can use, while others make their own food through photosynthesis or break down hydrocarbons, which is really useful for cleaning up messes like oil spills.

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