Meiosis & Genetics

Question 1

What are three types of biodiversity?

Answer 1

Genetic, species, and ecosystem

Question 2

Why is biodiversity important?

Answer 2

Biodiversity provides ecosystem services, increases stability, and contributes to the health of the biosphere.

Question 3

What are the direct and indirect values of biodiversity?

Answer 3

Direct use: Obtained through a removable product in nature (i.e. timber, fish, water). Indirect use value: Obtained through a non-removable product in nature (i.e. sunset, waterfall)

Question 4

What are the threats to biodiversity?

Answer 4

Extinctions, overexploitations, habitat loss, fragmentation, invasive species,…

Question 5

How is the current extinction rate different from the background extinction rate?

Answer 5

The current extinction rates are much higher than the natural background extinction rates.

Question 6

How can the decline of a single species affect an entire ecosystem?

Answer 6

The decline of a species could affect the balance of biodiversity in that ecosystem, and lead to the decline of other species that are linked.

Question 7

What are the two classes of natural resources?

Answer 7

Renewable and nonrenewable resources

Question 8

What are the methods used to conserve biodiversity?

Answer 8

• Connect smaller parcels of land, allowing organisms to move safely between them.
• Create a larger piece of land that can sustain a wider variety of species and a wider variety of genetic variation.

Question 9

What are two techniques used to restore biodiversity?

Answer 9

Bioremediation & biological augmentation

Question 10

What are the functions of proteins in the plasma membrane?

Answer 10

• When found on the outer surface of the plasma membrane, proteins called receptors transmit signals to the inside of the cell.
• Proteins span the entire membrane and create tunnels through which certain substances enter and leave the cell.
• Proteins at the inner surface of the plasma membrane anchor the plasma membrane to the cell’s internal support structure, giving the cell its shape.