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1.1 IB Biology Vocabulary

Across
ratio of image size to actual size.
states that all organisms are composed of cells, and that all cells come from pre-existing cells. (2 words, no space)
in behavioural science, the behaviour that is the consequence of a stimulus.
Surface area to ___________ ratio: a variable that decreases as cells grow, so that it sets a limit to the size of cells.
the alteration of a cell’s morphology and physiology through changes in gene expression
lens part of the microscope that gathers light from the specimen and focuses it to produce a real image
genus of single-celled ciliated organisms.
Focus dial used to initially focus a light microscope on a specimen.
metric prefix 1/100th
metric prefix 1 X 10–3.
a group of cells with a common function and structure.
Down
the process in which an organism regulates activities within cells and their bodies to keep conditions stable.
the synthesis of a functional gene product, often protein, but also rRNA, tRNA, or snRNA. (2 words, no space)
metric prefix 1 X 10–6.
metric prefix 1 X 10–9.
an increase in physical size
the sum of all of the chemical reactions that occur within an organism or within a cell
a degenerative eye disease that has been the target of stem cell research.
a relatively undifferentiated cell that can give rise to other types of cells and retains the ability to divide. (2 words, no space)
a means of visually indicating the magnification of an image. (2 words, no space)
a property of a system that emerges from the interaction of the elements of the system
a level of organization that emerges due to the interaction of elements.