Biology- Missed Questions

A student observes dark X-shaped structures in some onion root cells. Based on the observation, which process are these cells most likely performing?

Mitosis

What would most likely result if cytokinesis did not occur at the end of mitosis?-- ______ cell with ______ nuclei

1, 2

Having freckles is dominant over not having freckles. If two individuals heterozygous for freckles have a child, what is the probability the child will have freckles?

75%

Stem cells are immature cells that do not have a specific function. What causes these cells to become specialized cells such as blood cells?-- Certain genes are __________ and cause a particular cell to develop

Activated

How does the body of a runner keep up with the demand for energy when cellular oxygen levels are low? Through __________ respiration in the ________

Anaerobic, cytoplasm

Which transgenic organism has been used to clean up oil spills?

Bacteria

Which is a way prokaryotic and eukaryotic cells differ?-- Prokaryotic cells divide by _______ fission; eukaryotic cells _______ mitosis

Binary, undergo

Which statement best compares muscle cells with other types of body cells?-- Both muscle cells and other types of body cells have the same ______ sequence

DNA

In some ecosystems, wolves have been eliminated due to their threats to humans. How can the reintroduction of wolves benefit the ecosystem?-- It can eliminate weak animals from a prey population, thereby ______________ ____________for natural resources

Decreasing competition

Which word equation best represents the process of cellular respiration?

G + O to CD + W

Some scientists claim recent evidence suggests birds should be reclassified to share more taxonomic groups with dinosaurs. What type of evidence would provide the best support for this claim?--Evidence showing birds shared a common _________ history with dinosaurs

Genetic

An insecticide kills most of the ants on a plant. Over time, it is determined that the insecticide is not as effective for killing ants. Which statement best explains this observation?-- The ants killed by the insecticide and the surviving ants were _____________ different

Genetically

Scientists believe that the polar bear in Alaska and the brown bear in Russia evolved from a common ancestor. Which would be responsible for this evolutionary change?

Geographic isolation

Which process can occur in both mitosis and meiosis?

Independent assortment

Why does an animal cell swell and burst when placed in distilled water?-- Water moves _____ the cell because the concentration of water outside the cell is ________ than the concentration of water inside the cell

Into, higher

Genetically identical plants will produce either pink flowers or blue flowers, depending on the type of soil in which they are planted. What is most likely the explanation for the differences in flower color?-- ___________ factors effect the flower color

Inviromental

A student noticed that the freshwater plant, Elodea, produced bubbles when placed in direct light. What could the student most likely conclude? -- Bubbles of ____________ were produced as a result of _______________.

Oxygen, photosynthesis

Multicellular eukaryotic autotrophs belong to which kingdom?

Plantae

More ________ __________ of natural resources is likely occur if the population of the world continues to increase at predicted rates

Rapid Depletion

Which statement best describes natural selection?-- Organisms better adapted to their environment are more likely to ___________ and pass on their ______ to their offspring

Reproduce, traits

What carries the instructions for making amino acids in a protein?--The ___________ of nitrogen bases on the ________

Sequence, mRNA

Which best explains why the rate of a biochemical reaction decreases at high temperatures?-- The __________ of the enzyme changes

Shape

Why are many farmers encouraged to plant different types of crops on the same land throughout the year?-- It helps to preserve the quality of the ______

Soil

How can cells from the same organism have such different shapes and functions?-- During differentiation, different parts of the DNA in each type of cell are activated, resulting in the different ___________ and __________ of the cells

Structure, function

Which adaptation do ferns, gymnosperms, and angiosperms have that mosses do not have?

Vascular tissue

Which part of a plant cell helps it to maintain homeostasis?

cell membrane