Biology chapter 4 Flashcards
What is a chromosome?
threadlike structures found in a nucleus of a cell.
What is a gene?
Codes for a particular sequence of amino acids, to make a specific protein.
Chromosome can only be visible when?
Their dividing or stained with a special dye.
What is a DNA?
a chemical molecule with a double helix structure.
What does a DNA do?
determines what the cells does, contains a complete set of instructions to make a functioning cell.
Determines the characteristics of a living organism.
Passed on from the parents to their child/offspring during fertilization.
What is a gamete?
A sex cell, sperm and egg cell are called gametes.
What is fertilization?
The joining of a sperm cell with an egg cell is called fertilization.
What is a Variation?
the differences between living things of the same species is called a variation.
What is a species?
A group of similar organisms that can breed with one another to produce fertile offspring.
What are the two types of variations?
Continuous and Discontinuous.
What is the name given to the process that causes a characteristic in a population to become more common over time?
Natural selection.
Write down the word that describes the total number of individuals of the same species.
Population
What are chromosomes made of?
DNA
What term describes the differences that occur within the same species?
varaiation.
two carbon compounds found in living organisms
lipids and carbohydrate
three effects of climate change
less predictable rainfall
rise in sea level
Tsunami
what does a renal artery do?
Unfiltered blood enters the ren artery first.
What does kidney do?
filters the blood.
what does the ureter do?
urine flows to the bladder by this tube.
What does a bladder do?
urine is stored here before excretion from the body.
what does the urethra do?
urine flos out of the bladder to the outside world.
Vitamin A
pigment in the retina for vision
Iron
to make haemaglobin
Carbohydrate
supplies energy
