Answer:
By organising them into five major kingdoms and further dividing each kingdom into phyla (or divisions), classes, orders, families, genus, and species.
Explanation:
There are five kingdoms:
- Monera: bacteria
- Protista: amoeba, paramecium, euglena
- Fungi: yeast, rhizopus
- Plantae: flowering and non-flowering plants
- Animalia: animals (vertebrates and invertebrates)
Organisms that share the most similar features are grouped into the same species. Species with similar features fall under the same genus. Several genus make up a family, several families make up an order, several orders make up a class, several classes make up a phylum (or division), and several phyla (or divisions) make up a kingdom.
Note: there are three domains (or superkingdoms): Archea, Bacteria, and Eukarya.
Answer:
Mitosis: 2
Meiosis
Oogenesis: 1
Spermatogenesis: 4
Explanation:
Spermatogenesis
https://youtu.be/d5cQreR9h20
Oogenesis: Meiosis in Females, Part 1 of 2, Part 2 of 2, from Thinkwell's Video Biology Course
https://youtu.be/VPezOuOnq1g
https://youtu.be/pK7qjcgIox0
The work of Robert Virchow was trying to prove that cells came from preexisting cells.
Cancer is the result of unchecked cell division caused by a breakdown of the mechanisms that regulate the cell cycle. The loss of control begins with a change in the DNA sequence of a gene that codes for one of the regulatory molecules. Faulty instructions lead to a protein that does not function as it should
