to learn all the tips and tricks
on biology mastery? Learn from the
insiders and gain unfair advantage
over your peers. This free newsletter
is specifically designed for students
who are taking biology. Start having
the tips delivered to your inbox
weekly, enter your name and email
below to subscribe:
Sexual reproduction involves the formation of gametes. Fusions of gametes and formation of a zygote.
Algae, fungi and some protozoa reproduce both sexually and asexually
In meiosis a diploid parent cell creates four haploid daughter cells. The DNA has usually undergone some crossing over so the chromosomes are not only halved but are also changed through rearrangement.
Mitosis: Cells have two main stages in the life cycle. Interphase: the cells grow and duplicate their DNA, in the second stage the cell’s nucleus divides. In mitosis nuclear division starts after the cell has duplicated its DNA. The result is two exact copies of the DNA.
One of each copy goes to the new cells nucleus. Mitosis maintains the ploidy of a cell. That is a haploid nucleus undergoing mitosis creates two identical cells each with a haploid nucleus. A diploid nucleus undergoing mitosis creates two identical cells each with a haploid nucleus.
Asexual reproduction, in which a cell undergoes multiple mitoses creating a multinucleate cell is called a schizont. This multinucleate cell then simultaneously releases many uninucleate daughter cells called merozoites. Plasmodium, which causes malaria, reproduces this way inside red blood cells and within the liver. The huge release of merozoites results in the cyclic fever and chills associated with malaria.
Modern (early) 21st century classification is based on DNA and protein sequence information. This information combined with existing taxonomic information has resulted in new divisions and classifications. The kingdom Protista was reclassified into several new kingdoms: Alveolata, Euglenozoa, Diplomonadida and Parabasala. In the current classification scheme Algae are distributed in the kingdoms: Stramenophila and Rhodophyta and Plantae. Water molds belong to the kingdom of Stramonophila and slime molds are in the kingdom Mycetozoa.
Rapid Study Kit for "Title":
Core Concept Tutorial
Problem Solving Drill
Review Cheat Sheet
"Title" Tutorial Summary :
The taxonomy and classification of the eukaryotes: fungi, algae, protozoa and helminths (parasitic worms e.g. tapeworms, flukes) are introduce. Meiosis (sexual reproduction) is presented in a step by step process and contrasted with mitosis.
21st and 20th Century classification methods are compared and contrasted and applied to eukaryotes.
Specific Tutorial Features:
Meiosis and Mitosis are described in a detailed step by step process.
Protozoa nutrition reproduction and classification is described.
Fungus morphology, nutrition, reproduction and classification is examined and described.
Algae as a group are examined and described in detail. The classification and unique niches these organisms live in are explored. The essential contribution that algae make to oxygen is introduced.
Eukaryotes have great reproductive variability and benefit from genetic recombination.
Concept map showing inter-connections of new concepts in this tutorial and those previously introduced.
Definition slides introduce terms as they are needed.
Visual representation of concepts
Animated examples—of concepts are used to step wise breakdown a concepts.
A concise summary is given at the conclusion of the tutorial.
"Title" Topic List:
In sexual reproduction two gametes having a single copy of each chromosome are united. The resultant cell is 2N or diploid. The gametes are formed in a process known as meiosis. Mitosis takes place in somatic cells, (cells not involved in sexual reproduction). In mitosis the newly made cells are an exact copy of its DNA. The cell then divides with each new cell having a diploid (2N copy of the DNA).
The taxonomy and classification of the eukaryotes: fungi, algae, protozoa and helminths (parasitic worms e.g. tapeworms, flukes) are introduce.
Eukaryote DNA and genome structure and function are presented.
Classification of eukaryotes are described in terms of traditional and modern methods.