Cell Structure & Function
Eukaryotic organisms have membrane-bound organelles. Which of these organelles is considered the "control center" and stores the genetic material for the cell?
The nucleus.
Which term best describes the type of cell division in which parent cells produce daughter cells with the same number of chromosomes as the parent cells?
What is Mitosis
Which kingdoms have photosynthetic organisms?
A fungi and plants
B fungi and protists
C protists and plants
D plants and animals
What is C
A scientist treats a cell with a chemical that destroys the ribosomes. As a result, which cell process will be stopped?
A osmosis
B photosynthesis
C protein synthesis
D respiration
C-Protein Synthesis
The crab Lybia tessellata carries a pair of sea anemones on its claws. The crab uses the sea anemone’s stinging tentacles as protection and the sea anemone obtains small food particles released by the crab as it feeds. Which type of symbiotic relationship does this best illustrate?
A commensalism
B mutualism
C parasitism
D predation
What is B-mutualism
Placing wilted lettuce in cold water will make it crisp again. Which statement best describes what happens to restore the lettuce to its original condition?
A Water left the lettuce cells by diffusion.
B Water entered the cells of the lettuce by osmosis.
C Osmosis caused salts to enter the lettuce cells.
D Salts in the leaf caused water to leave the cells.
B-Water entered the cells of the lettuce by osmosis.
This process occurs in the nucleus and produces a molecule of RNA
What is Transcription
According to fossil records, the horses that lived 50 million years ago were much smaller, weaker, and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses?
What is Natural Selection
In which way are photosynthesis and cellular respiration different?
A Cellular respiration stores ATP, while photosynthesis releases ATP.
B Cellular respiration produces oxygen, while photosynthesis uses oxygen.
C Photosynthesis releases energy, while cellular respiration stores energy.
D Photosynthesis uses carbon dioxide, while cellular respiration produces carbon dioxide.
What is-D
In an ecosystem, which is the most likely reason for an increase in the producer population if there is an increase in the carnivore population?
A fewer herbivores
B higher temperatures
C less food
D more oxygen
What is A
This organelle is the site of aerobic cellular respiration in eukaryotic cells.
What is Mitochondrion
A fertilized egg undergoes several stages before it is implanted. In which structure of the human reproductive system is the blastocyst implanted during normal human development?
What is the Uterus?
Which would most likely favor species survival in changing environmental conditions?
A genetic recombination
B energy involvement in gamete production
C length of life cycle
D number of offspring produced
What is A
In humans, glucose is kept in balance in the bloodstream by insulin. Which concept does this best illustrate?
What is Homeostasis
A fungicide was used to kill the mushrooms in a lawn. Some mushrooms were not affected by the fungacide. The resistant mushrooms reproduced. The resistance of some of the mushrooms to the fungicide was
A caused by the existence of mutations
B transmitted to the mushrooms from the fungicide
C transferred through the food web
D developed in response to the fungicide
A caused by the existence of mutations
A sugar, a phosphate group, and a nitrogen base form a nucleotide which is the building block (monomer) of which macromolecule?
What is Nucleic Acid
Some flowers show incomplete dominance. If RR = white and R′R′ = red, which phenotypic ratio would be expected in the offspring of two pink flowers?
1 Red: 2 Pink: 1 White
The presence of gill-like slits in the human embryo is considered to be evidence for
A the theory that fish and mammals have common ancestry
B the theory that the first organisms on Earth were heterotrophs
C the close relationship between fish and mammalian reproductive patterns
What is B
Pollen in plants is most similar to which type of cell in humans?
What is -Sperm
Which will most likely happen if the decomposers are removed from the carbon cycle?
A The amount of carbon dioxide in the atmosphere will increase.
B The amount of carbon dioxide in the atmosphere will decrease.
C The amount of carbon dioxide used by producers will increase.
D The amount of carbon dioxide needed by consumers will decrease.
What is B
Predict what may occur if a cell skips the S phase?
Error in mitosis. Too little DNA for daughter cells. Daughter cells not identical. Apoptosis.
A diploid cell contains 2 pairs of homologous chromosomes Ss and Tt. Due to independent assortment what is the possible genetic make-up of the gametes produced by this organism?
A SsTt
B Ss, Tt
C S, s, T, t
D ST, St, sT, st
What is D
This mechanism of evolution occurs when organisms migrate between populations:
A extinction
B genetic drift
C gene flow
D Natural Selection
B gene flow
What is the function of enzymes in biological systems?
A Enzymes act as substrates when the necessary proteins are unavailable.
B Enzymes act as products to create new chemical reactions.
C Enzymes act as catalysts to drive chemical reactions forward.
D Enzymes bond with substrates to create the new reaction products.
What is C
Why do ecosystems rarely contain more than a few trophic levels?
Energy transfer efficiency is low; 10% rule