Bio 121 exam - Study guides, Class notes & Summaries

A student was studying cell growth using cells grown in laboratory cultures. The cultures were synchronized so that all of the cells passed through the same stage of the cell cycle at the same time. The cells were examined during five different periods of time, intervals (A-E). The amount of DNA present per cell was determined for each interval. The graph shows the result of this study. 1. Most of the cells examined during interval A have half as much DNA as those measured in interval...

BIO 121 Exam 1 Review Spring 2024 Evolution The gradual change in a species over time. Adaptation When the heritable trait increases an individuals fitness in a particular environment. Ancestral trait Is a character that existed in an ancestor. Derived trait Is one that is a modified form of the ancestral trait, found in a descendants. Vestigial trait A reduced or incompletely developed structure that has no (or reduced) function (e.g. human tailbone or wisdom teeth). Homologous str

BIO 121 Exam 1 Review Spring 2024 Evolution The gradual change in a species over time. Adaptation When the heritable trait increases an individuals fitness in a particular environment. Ancestral trait Is a character that existed in an ancestor. Derived trait Is one that is a modified form of the ancestral trait, found in a descendants. Vestigial trait A reduced or incompletely developed structure that has no (or reduced) function (e.g. human tailbone or wisdom teeth).

What are the characteristics of life? organization, metabolism, responsiveness, growth, development, reproduction What are the levels of biological organization molecules-Organelles-cells-tissue-organs and organ systems-organisms-populations-communities-Ecosystems-The biosphere Biotic Vs. Abiotic Biotic: living ex. animals, plants, bacteria Abiotic: nonliving ex. rock, water, air What is emergent property? They result from the arrangement and interaction of parts within a system What are two...

Respiration Breakdown of fuel (food) molecules to release energy; ALL living organisms do this Photosynthesis Using sunlight energy and atmospheric CO2 to make food molecules; Autotrophs Photosynthesis equation Energy+ 6CO2+ 6H2O= C6H12O6+ 6O2; reverse of respiration; synthesizes carbohydrates Where does photosynthesis take place? Chloroplasts- the leaf mesophyll cells Things that use photosynthesis photosynthetic autotrophs; plants & green algae, non-plant eukaryotes (kelps, diatoms), bacte...

Lamarck's hypothesis of "inheritance of acquired characteristics". an individual adapts in its lifetime, and that this adaptation is passed on to the next generation. the various example of inspiration that led Darwin to develop his idea Extinct glyptodons (giant armadillo) and modern-day armadillos (seven-banded armadillos) looking similar to each other, suggesting that they were related, but changed to adapt to their environment. b) Extinct megatherium and tree sloths looking similar to ea...

Environmental Science The scientific study of how the natural world works, how our environment affects us, and how we affect our environment Natural Resources the goods provided by the environment. Can be renewable or nonrenewable Ecosystem Services natural systems provided by the environment Ecological Footprint a quantitative measure of resource consumption based on the cumulative area of biologically productive land and water Two Big jumps in our population due to: Agricultural Revolution...

Bio 121 Exam 1 Povinelli Questions and answers latest update

BIO 121 Exam 1 Review Spring 2024 Evolution The gradual change in a species over time. Adaptation When the heritable trait increases an individuals fitness in a particular environment. Ancestral trait Is a character that existed in an ancestor. Derived trait Is one that is a modified form of the ancestral trait, found in a descendants. Vestigial trait A reduced or incompletely developed structure that has no (or reduced) function (e.g. human tailbone or wisdom teeth). Homologous str...

CCU BIO 121 EXAM 1 QUESTIONS & ANSWERS (2023/2024)(VERIFIED ANSWERS)