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Q 1/15
Score 0
Both primary and secondary succession begin with pioneer species that _______
300
change the area and make it safer from predatory organisms
invade the area so that new organisms cannot be established
modify the area and allow larger and more complex organisms to appear
use up all the existing resources and prevent establishment of non-native organisms
Q 2/15
Score 0
According to cell theory, all cells ________
300
carry out meiosis
contain chloroplast
have a nuclear membrane
come from other cells
15 questions
Q.
Both primary and secondary succession begin with pioneer species that _______
1
300 sec
Q.
According to cell theory, all cells ________
2
300 sec
Q.
Which statement below best describes how biodiversity contributes to the sustainability of an ecosystem?
3
300 sec
Q.
DDT is a pesticide that causes the eggshells of certain birds, like the brown pelican, to become fragile and thin. The adult birds would accidentally crush the eggs while incubating them. What happened to the brown pelican populations as a result of DDT use by humans?
4
300 sec
Q.
An energy pyramid is shown. Based on the model, which consumers would receive the greatest amount of energy captured by the producers in their food chains?
5
300 sec
Q.
How does the agricultural activity most likely affect the surface water of the area?
6
300 sec
Q.
A student drew the picture of the human body system below. The student labeled some of the organs of the system. The main function of this system is to _________
7
300 sec
Q.
Many Texas caves provide a habitat for animals. The diagram below shows the relationships of some organisms involved in a cave ecosystem. Based on the diagram, which of the following statements is valid?
8
300 sec
Q.
A student listed how different parts of the body work to aid in the digestion of food. Which of the following is a chemical change that occurs to the food?
9
300 sec
Q.
If mice were eliminated from this web, which conclusion could you make?
10
300 sec
Q.
Part of a human body system is pictured below. The main function of this system is to _______
11
300 sec
Q.
Which sentence best describes how energy flows through this pyramid?
12
300 sec
Q.
The diagram below shows parts of a cell. Which organelle stores the information that determines an individual's blood type?
13
300 sec
Q.
A group of students prepared a table listing the types of reproduction that occur in several organisms. Based on this information, which of the organisms can produce offspring that are genetically identical to the parent organism?
14
300 sec
Q.
A partial marine food web is shown below. Green crabs carry a parasitic worm that can infect organisms that prey on the crabs. Which organism is most likely to be infected with this parasite?
