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bảng tínhCh. 1 Biology in the 21st Century
Total câu hỏi: 15
Worksheet time: 9mins
At which stage of scientific thinking are scientists most likely to consider the data and conclusions of other scientists to propose new experiments?
observing
testing hypotheses
analyzing data
forming hypotheses
A physical environment with different species that interact with one another and with nonliving things is called a(n)
biosphere
ecosystem
habitat
adaptation
The various parts of Earth's biosphere are connected and
similar
nonliving
diverse
aquatic
During an experiment, which factors are observed and measured?
dependent variables
independent variables
constants
hypotheses
The study and manipulation of DNA on a molecular level is known as
biochemistry
genomes
molecular genetics
evolution
What is the name given for genetic changes in living things over time?
adaptation
homeostasis
evolution
negative feedback
Scientists use observations and data to form and test
constants
hypotheses
theories
conclusions
Similar organisms that can reproduce by interbreeding belong to the same
ecosystem
environment
habitat
species
How have computer models expanded biological research?
they help scientists design better experiments
they simulate complex biological systems that cannot be studied directly
they give scientists the ability to observe molecules directly
they allow the use of human experimental subjects
Which phrase best describes scientific theories?
explain few observations
serve as speculations
are never proven
cannot be replaced
The variety of life across the biosphere is called
biodiversity
genomic
homeostasis
ecology
Organisms rely on both negative feedback processes and behavior to maintain
homeostasis
adaptations
ecosystems
evolution
Finch species in the Galapagos Islands have a wide variety of beak shapes. The theory of natural selection suggests that these differences arose because:
changes occurred over a short period of time
finches with certain beak shapes survived in greater numbers
conscious decisions allowed certain finches to survive
individual finches adapted to their environment
What are two ways scientists can describe the quality of measurements?
accuracy and precision
quality and quantity
observation and experiment
hypothesis and theory
Joaquin recorded in his field journal that he had observed 18 blue birds feeding outside his classroom window. This is an example of what type of observation?
hypothetical
theoretical
quantitative
qualitative
