Csec Flashcards
(24 cards)
State two reasons why mitosis is important to living things
it ensures that each daughter cell contains an identical combination of genes, and it also ensure that all daughter cells contain the diploid number of chromosomes
This two ways in which genetic variation occurs in living organisms
Mutation and sexual reproduction
Two substances stored in plants And where they are stored
Water in stem and calcium oxalate in leaves
Name, one part of the body in which meiosis occurs
The testes in males or the ovaries in females
The two reasons why storingfood is important to live in organisms
Three reasons why story food is important in living organism is to provide energy when Food is not available to support growth and repair in the body and maintain life processes like respiration through periods of fasting or resting
Name the structure within a nucleus, which contains the genetic material
The chromatin threads
Name the two gametes produced via meiosis in flowering plants
Sperm and egg cell
Stay two reasons why meiosis is important to living things
Meiosis is important because it produces gaits with half the number of chromosomes and ensure the chromosomes is restored due in fertilization, and it also increases genetic variation, which helps populations, adapt, and survive changes in the environment
What does the term conservation mean in biology
Conservation in biology refers to the careful use of natural resources to prevent their overuse or destruction, and to ensure they are availability for future generations
There is three materials that can be transported in multicellular organisms
Oxygen nutrients and carbon dioxide
Define the term breathing
Breathing is the process of inhaling air into the lungs and exhaling it back into the atmosphere
Define the term diffusion
Diffusion is the movement of molecules for my region of higher Concentration to Region of lower concentration until even spread
Define the term respiration
Respiration is a chemical process which occurs in the cells where glucose reacts with oxygen to create energy
Name the three muscles in the rib cage, which I responsible for breathing in human
The intracoastal muscles, the diaphragm muscles, and the abdominal muscles
Define the term egestion
Egyptian is the removal of undigested food particles from the body as feces
What is excretion?
Exclusion is a removal of ways products made by cells during metabolic activities. Example CO2 O2 and excess water.
The two organs of excretion and the substance Excreted
The lungs excrete carbon dioxide, and the kidney excrete urea
Autotrophic nutrition
Autotrophic nutrition occurs in green plants and some bacteria. It is the use of simple inorganic compound such as carbon dioxide and water to create complex organic compound, such as protein
Heterotrophic nutrition
Heterotrophic nutrition occurs in animals, fungi, and most bacteria. It is obtaining ready-made food sources to obtain nutrition.
Function of the red blood cell
Carries oxygen from the lungs to the body cells using haemoglobin.
Function of the white blood cell
Fights infections by destroying germs and producing antibodies.
Function of platelets
Helps the blood to clot and stop bleeding when there is a cut.
Three substances that can be found in the blood
Carbon dioxide glucose and hormones
