Exam prep · Free college course
A complete second-semester college biology course for science majors, built from OpenStax Biology 2e chapters 18 through 47, the C-ID BIOL 135S organismal descriptor and AP Biology units 7 and 8. It opens with evolution - natural selection, population genetics and Hardy-Weinberg, speciation and phylogenetics - then works through the diversity of life: viruses, prokaryotes, protists, fungi, plants and animals. The middle third covers plant form and physiology, then animal body systems (homeostasis, nervous and sensory, endocrine, musculoskeletal, respiratory and circulatory, osmoregulation, immunity and reproduction) at an intro depth - Encodr's Ultimate MCAT Deck and UNE MSBS decks go deeper on human physiology. The course closes with ecology: population growth, community interactions, energy flow and biogeochemical cycles, and conservation. Hardy-Weinberg allele and genotype frequencies, population growth models and trophic-transfer calculations are worked calculations, each recomputed by script before publishing.
Copied straight from the course. In the app, each wrong option also gets its own explanation.
Card 1A person feels dizzy and off-balance while spinning their head quickly, but their sense of gravity when standing still is unaffected. Which structures are most directly involved in detecting the spinning motion?
The semicircular canals. The semicircular canals specifically detect angular acceleration and rotation, matching the spinning-motion symptom.
Card 2Yew trees produce taxol because their associated fungi transferred taxol-production genes to the tree; aphids acquired fungal carotenoid-pigment genes plausibly tied to their diet. What do both examples illustrate?
Horizontal gene transfer in eukaryotes. Both the yew-fungus and aphid-fungus examples are named eukaryotic cases of horizontal gene transfer, genetic material moving between unrelated lineages rather than from parent to offspring.
Card 3In the Silver Springs case study, GPP was 20,810 kcal/m^2/yr and producer respiration used 13,187 kcal/m^2/yr. What is the net primary productivity (NPP)?
7,633 kcal/m^2/yr. NPP = GPP minus the producers' own respiration, so 20,810 - 13,187 = 7,633 kcal/m^2/yr is the energy actually available to primary consumers.
Yes. Create a free Encodr account and all 18 units and 1,398 cards are yours to study, with spaced repetition scheduling your reviews.
This course assumes first-semester biology (cell structure, metabolism, genetics). The two semesters do not depend on each other content-wise, but General Biology I is the more natural starting point.
OpenStax Biology 2e chapters 18 through 47: evolution and population genetics, phylogenetics, viruses, prokaryotes, protists, fungi, plant and animal diversity, plant physiology, animal body systems, and ecology.
Intro depth only. Encodr's Ultimate MCAT Deck and UNE MSBS post-bac decks cover human physiology in much greater depth - this course links to them rather than competing.
Hardy-Weinberg allele and genotype frequencies, exponential and logistic population growth, and the 10% trophic-transfer rule are worked calculations. Every numeric card states its rounding rule and was independently recomputed before publishing.