Biology STAAR

A tapeworm is a worm with no digestive tract. They live in the intestines of other animals and absorb food that has already been digested by their host. What type of relationship do tapeworms exhibit?

• Commensalistic

• Mustualistic

• Parasitic

• Predation

• A

• B

• C

• D

• A

• B

• C

• D

Based on the information provided, which two species are most closely related? LOOK CAREFULLY

• Northern cricket frog and bullfrog

• Northern leopard frog and green treefrog

• Northern cricket frog and green treefrog

• Northern leopard frog and bullfrog

Which of the following is the name given to organisms that feed on dead matter?

• autotrophs

• heterotrophs

• decomposers

• producers

The energy pyramid shows the energy made available by producers. (View Image)

Base on the energy flow between trophic levels in an energy pyramid, how much energy would be expected to be found at the secondary consumer level in this pyramid?

• 100 joules

• 500 joules

• 1,000 joules

• 50 joules

What is the difference between a food chain and a food web?

• A food chain shows the many different food webs in an ecosystem

• A food web shows the many different food chains in an ecosystem

• A food web shows the many different trophic levels in an ecosystem

• A food chain and a food web are the same; there is no difference

This organelle turns the light energy into a simple sugar. 

• Mitochondria
• ER
• Chloroplast
• Nucleus

Nitrogenous bases are located on both strands of the DNA double helix. What is the significance of the nitrogenous bases?

• The number of adenines and cytosines determines the type of RNA that will be produced.

• The order of nitrogenous bases determines the order of amino acids in the proteins synthesized.

• The amount of thymine and guanine in the DNA molecules determines the length of the genes.

• The type of hydrogen bonding between the nitrogenous bases determines which amino acid will be added to the peptide chain.

What is the fluid inside a cell called? 

• Endoplasimic Reticulum
• Orange Juice
• Water
• Cytoplasm