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• Biologie
• Middelbare school
• vwo
• Leerjaar 3

A rhesus monkey has 46 chromosomes. How many chromosomes in its sex cell?

1. 46
2. 23
3. 44
4. 22

Gene

Allele

Phenotype

Genotype

Gene pool

Version of a gene

All copies of a gene in a population

Section of DNA that controls a particular trait

Set of alleles

Observable features

Drag the keyword to its definition

sex cell

pairs of chromosomes

fertilised egg cell

Single chromosomes

zygote

haploid

diploid

gamete

genotype

phenotype

XY chromosomes

cannot change!

you inherit this

can sometimes change during your life

you do not inherit this

a scar

Is not always visible

What are Chromosomes?

1. Little packages of DNA
2. Little packages of proteins
3. Little packages of genes
4. Little packages of cell organelles

The best description of natural selection is

1. The survival of the fittest
2. The struggle for existence
3. The reproductive succes of the members of a population best adapted to the environment
4. the overproduction of offspring in environments with limited natural resources

Which of the following is NOT a component of the theory of evolution by natural selection?

1. competition for food and space
2. variation among species
3. inheritance of acquired characteristics
4. survival and reproduction

Evolution

Life develops, new species develop

• Variation
• Selection
• Extinction

Evolution completely

Just the skeleton (from E to A)

65 million years ago in Yucatan....

EFFECTS:

- Crater of 12 km

- Deadly bombardment because of pieces of rock and metorite

-Earth covered with dust layer --> no sunlight, plants couldn't grow --> no food for animals

- Acid rain

- A lot of energy was released--> temperature rose to 1000 degrees. Trees and animals were burnt in environment of metorite.

- Above rock layers of 65 million years and older there is a layer of clay with iridium --> iridium is not found on earth. + fossils of dinosaurs below this

2,4 million years ago the first Homo Sapiens were on earth

1. True
2. False

2, 4 mln: Human kind & 200 000 years Homo Sapiens

After the extinction of dinosaurs, other mammals could develop, like: 

Period with a lot of vulcanic eruptions will cause:

1. Decrease of temperature
2. Rise of temperature

Why did dinosaurs also die at what we now call Russia

1. Everywhere on earth it became 1000 degrees
2. They died because the darkened sky due to the layer of dust
3. Bombardment of rocks and parts of the meteorite
4. Plants died because the darkened sky due to the layer of dust

Species get extinct averagely every ..... years

1. 1 million
2. 16 million
3. 23 million
4. 35 million