Biology
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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How many chromosones does a human have?
46
When do cells have the need to divide?
• When an organism grows • Organisms tissue gets damages and needs cells to repair the tissue
Name a type of cell division?
Mitosis
What are eukaryotic cells? What do they make up?
Cells that have a nucleus, and these cells make up plants, animals and fungi
What are prokayotic cells?
Cells that lack of nucleus and other organellas. And these cells perform more specialised functions
What is cell divison?
Cell division is the process in which a parent cell divides, giving rise to two or more daughter cells
What are the three steps of the cell cycle?
1- Interphase 2- Mitosis 3- Cytokinesis
Who uses cell division? And what for?
Multicellular organism to repair and grow
How does bacteria reproduce?
Aesexually
How do cells increase in number? What does the process include?
by dividing into two. the prcoess of cell division includes a growth phase where the cells doubles its sub-cellular stucture and DNA before it splits into two.
How does bacteria use the cell cycle?
For asexual reproduction
What is a haploid cell?
-Is half - Nucles contains half the dna
What is a diploid cell?
• duaghter cell • contains a full nucleus
Which cell is bigger, eukaryotic or prokayotic?
Eukaryotic, think of you. you are a human so your “big”
Name some similarites in animal and plant cells:
• Both have a nucles- contains gentic material/DNA • Cell membrane- controls what can pass in and out of the cell • Cytoplasm- where chemical recations take place • Mitochondria- provide energy the cell needs to function> break down glucose in aerobic process that releases enrgy • Ribosomes: where proteins are made
Name some differences in animal and plant cells:
Plant cell have a rigid cell wall made by celullose- animals dont have a cell wall but a cell membane • pemanent vacuole- mixtire of sugar, salts and water • cholorplasts- for photosynthesis • plant cells are fixed in shape while -animal shapes are not in a fixed position • vacuole in plant cells occupies more space than the vacuole in animal cells that is much smaller
What do eukaryotes have?
they have a membrane bound nucleus
Name two lens of a microscope
-eyepiece lens and e objective lens
How to measure magnification?
through: I AM, triangle I-image lenght A- Actual lenght M- Magnification
How does food pass down the oesophagus? name the process
• peristalsis is the process, its the force that helps with the push down of the chewed nutrients down the oesophagus.
What is the function of the small intestine?
• absorbs most of the nutrients in your food and your circulatory system passes them on, to other parts of your body to store or use
What is the first part of your intestine called?
duodenum
What is the function of the circulatory system in your digestive system?
The function of your circulatory system in your digestive system is after the nutrients are absorb by the small intestine, the circulatory system helps passing on the nutrients to other parts of the body, in order to store it or use it
Where is the bile produced?
the bile is produced in the liver.