Few questions about biology?

[Bubbles]

I'm studying grade 11 biology right now and I find it fascinating. But school doesn't cover everything and I have many questions. I hope you can clear things up for me. And maybe you'll find these questions quite annoying and nonsense, (as my mom says) but plz bear with me..
1: How do bacteria move? I mean I know for example some them have flagella, but I don't think rocks can move if they had them? I read something about electromagnetic stuff but don't really get it.

2: Exactly how did bacteria form? where did the organelles come from? How did DNA form? are they just atoms randomly came together?

3: (mitosis) In DNA replication, where did the floating nucleotides come from?

4: Do cells in our body spend all their life preparing for mitosis? Do they just perform their functions as a way to prepare for cell division?

5: Do DNA only form chromosomes before cell division?

6: In mitosis, are the spindles always there? or do they form during mitosis and then disappear?

7: Feel free to add additional information! I would love to learn more.

Answer what you like, but please don't leave out the details. I really want to get this stuff.

Appreciated!!

 

[Stephanie D]

1. The grasp onto a moist surface and pull themselves forward. They basically wiggle.
2. Bacteria forms mostly due to food or any scraps that are moist, as bacteria like fungus grow best in damp areas.Also bacteria is a prokaryote and cotain no membrane bound organelles. Organelles are things like mitochondria and endoplasmic reticulum.
DNA: Eoxyribonucleic acid is a nucleic acid that contain the genetic instruction used in the development and functioning off all living organism and viruses.
DNA is kind like blueprints. DNA consists of two long polymers of simple units called nucleotides .They run backwards and they cause people and animals to be the way they are.
DNA is embeeded in every cell in your bodys. No one really knows whre or how DNA was oringinaly formed. It comes from RNA.


Mitosis involves the replication of DNA and its speration in two new cells. WHile only four phases of mitosis are often listed, theres really six phases:
Interphae: involves extensive preparation for the division process.
Prophase: condenstation of chromosomes the nuclear membrane disappears formation the spindle apparatus chormosomes attrach to spindle fibers.
Metaphase: Chromosomes attaced by spindle fiber align along the mdiline of a cell.
Anaphase: the centromere splits and chromatids move apart.
Telophase: Nuclear membrane reforms around newly divded chromosomes
Cytokinesis: Division of cytoplasm cell membranes and organelles occur in plants a new cell wall forms.

Hope i helped alittle.