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50 Question Test #2

Which group contains single-celled organisms? fungus
What conclusion can be made about earthworms because they do NOT have an internal skeleton? They are invertebrates.
Organisms can be separated by their most basic characteristics into the broadest groups known as domains
The classification of some organisms has changed. What new process is used to reclassify organisms? Structures are now examined at the molecular level.
Single-celled organisms that cause disease can be found in which domain? Bacteria and Eukarya
Some prokaryotes once classified in the domain Bacteria are now classified as Archaea
How are organisms classified as Eukarya different from organisms classified as Archaea and Bacteria? They all have membrane-bound nuclei.
Prokaryotes that live in extreme environments. Archaea
Which system groups life forms by Domains? Archaea, Eubacteria, Eukaryota
Which cellular organelle modifies fatty acids? endoplasmic reticulum
Statements that are TRUE for plant cells and FALSE for animal cells. Plant cells make their own food, but human cells do not.
Which body system is responsible for breaking down food into molecules that it absorbs? digestive
What part of the body receives information from the senses? brain
Which two human body systems are MOST responsible for getting oxygen to cells? circulatory and respiratory
Which of these is a function of all cells? to transfer genetic information from one generation to the next
Which of these is the basic building block of complex organisms? a cell
How do muscles and bones work together to create body movement? The muscles pull on the bones.
The nucleus of the cell controls cell activity. Which body system performs a similar function in humans? central nervous system
A child's sex is determined by the sex chromosomes of which person? father
Which of these cell parts contain instructions for the passage of traits from one generation to the next? chromosomes
DNA stores the genetic instructions transferred from one generation to the next. What is DNA? a molecule
Which of these cell parts store genetic instructions for the entire organism and transfers them from one generation to the next? DNA molecules
What is the definition of heredity? The passage of genetic information from one generation to the next.
Some fungi can reproduce either asexually or sexually, resulting in offspring with different characteristics. Sexually produced offspring have a combination of genetic material from each parent cell.
This is a part of the process of sexual reproduction. pollination
Potatoes reproduce by growing sprouts on their surfaces. When planted, these sprouts grow into new plants. This is an example of asexual reproduction
A statement which describes a characteristic of both sexual and asexual reproduction New cells are produced
What is a benefit of sexual reproduction? Ability to produce genetically different offspring.
What structure is found in producers in nearly all ecosystems? chloroplasts
A statement that explains why photosynthesis is the foundation of most food webs. Sunlight is the source of energy for nearly all ecosystems.
How does the water in an estuary compare to the water in the open ocean? Estuaries have more concentrated nutrients and less concentrated salt.
A true comparison of ecosystems. Grasslands get more rain than deserts.
What is a true of mutualistic relationships among organisms? The organisms cooperate with each other.
In a completely cooperative relationship, each organism benefits equally. What sequence lists these relationships in order of increasing cooperativeness? predation, parasitism, commensalism, mutualism
A statement that describes two species of animals that live in biological coexistence with each other. They live in the same area but have different food and nesting needs.
Animals depend on plants for many things, including food. What do plants depend on from animals? carbon dioxide
This statement best describes biomes. Large ecosystems that have distinctive organisms and a particular climate.
As members of a food web, humans are considered to be consumers
What has to happen for an inherited trait to increase in a population? Organisms with the trait need to bear more offspring than organisms without the trait.
As some organisms die, their remains become buried by mud and are eventually compressed into a type of rock. What rock type forms from this process? sedimentary
Fossil records indicate that species changes generally.\ take place over many generations
What factor MOST accurately describes the statement "survival of the fittest" in relation to natural selection? The ability of offspring to reproduce
In what scenario would natural selection MOST likely occur? centuries of gradual climate change
While digging in the side of a hill, students found fossils in the rock layers. From the fossils they uncovered, what was the MOST likely progression of environments in that area? It was first a forest and then became a lake.
Diversity among members of a species is important because diversity increases the chances of survival under changing conditions.
In what type of rock would a geologist MOST likely find evidence of ancient life? sedimentary
Sedimentary rock helps scientists piece together the history of Earth MOST likely using clues from fossils
What would help determine the changes in a plant species over geologic time? examining the fossil record of the plant