Why might there be a lot of spacing between the desert plants shown growing in this photo?
A) The plants exploit water and nutrients preventing other shrubs from establishing in their area.
B) The plants need room to grow and expand as they mature.
C) The other plants around them have died because there is not enough space in the desert area where they grow.
D) The plants exploit the nitrogen produced in the atmosphere causing only stronger plants to survive the harsh desert-like environment.
E) The roots of strong plants are established and force other plants out because they are more mature.
Question 2
Vietnam's population density is high in the south, around the city of Saigon and the nearby:
A) city of Hanoi
B) Mekong River
C) Strait of Malacca
D) Khorat Plateau
Sirius A and B Hubble photo
Viruses, such as the hepatitis B virus shown here, need a host to survive and multiply
Split-brain patients were shown composite photographs
Desert soil profile