Many endoparasites lack complex digestive systems. Which is the most likely reason for this

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Marks: 1
Many endoparasites lack complex digestive systems. Which is the most likely reason for this?
Choose one answer.
a. Endoparasites do not usually kill their hosts.
b. Endoparasites feed on food already digested by the host.
c. Endoparasites live only inside their hosts, not outside.
d. Endoparasites eat only plants, which are easy to digest.
Question 2
Marks: 1
The new island of Surtsey was formed near Iceland by a series of volcanic eruptions. Which of these processes occurred first on Surtsey?
Choose one answer.
a. Plants grew on the island.
b. Volcanic rock broke down into soil.
c. Animals moved onto the island.
d. A complex ecosystem developed.
Question 3
Marks: 1
The reestablishment of a damaged ecosystem in an area where the soil is intact is called
Choose one answer.
a. symbiotic succession.
b. pioneer succession.
c. primary succession.
d. secondary succession.
Question 4
Marks: 1
To measure population density, you must divide the number of individuals living in a defined space by the
Choose one answer.
a. area of the space.
b. birth and death rates.
c. carrying capacity.
d. perimeter of the area.
Question 5
Marks: 1
Parasitism is most similar to
Choose one answer.
a. mutualism.
b. interspecific competition.
c. predation.
d. commensalism.
Question 6
Marks: 1
Pioneer species are the first
Choose one answer.
a. organisms to cross an ocean
b. organisms to live in previously uninhabited areas.
c. trees that replace the original trees after a forest fire.
d. trees to grow in an area that has been disturbed.
Question 7
Marks: 1
The mantella frog and poison dart frog occupy similar niches in similar habitats in different parts of the world. Because of this, they are considered to be
Choose one answer.