Definitions
the system formed by the living beings on Earth and the relationships that are established between them and their environment.
biosphere
inorganic biomolecule with unique properties that make it essential for living beings, as they use it in their cellular processes
water
surrounds the cell, separating it from the external environment. it's semipermeable, which means that only certain molecules can pass through it.
cell membrane
how many main tenants are there of Cell Theory?
3
proposes that the origin of life is extraterrestrial and that the first organic molecules or cells arrived to Earth in the meteorites or the comets that hit our planet.
panspermia hypothesis
the minimum units capable of performing vital functions and the functional, structural, reproductive and genetic unit of all living beings
cells
organic biomolecules that contain the genetic information of living beings and are responsible for cellular functioning
nucleic acids
the viscous materials inside cells
cytoplasm
how many centuries later was Cell Theory developed?
2 centuries
according to this theory, life began in the water. As time passed, life evolved and spread throughout the land surface.
the primordial soup (theory of chemical evolution)
the simplest cells that we know and their main characteristic is that they do not have a defined nucleus. BACTERIA
prokaryotic cells
organic biomolecules that perform very varied functions: they form muscles, nails and hair, participate in the defense of the body, transport substances, etc.
proteins
it is deoxyribonucleic acid (DNA). it contains the genetic information of the individual and conducts all cellular functions.
genetic material
all living beings are composed of one or more _______.
cells
the ___________ is the gaseous layer that cover the Earth, protects it from harmful radiation, creates a temperature suitable for life and provides essential nutrients like oxygen and carbon dioxide
atmosphere
cells that have a nucleus. two different types of these cells: animal and plant.
eukaryotic cells
also known as fats or oils. biomolecules that function as an energy deposit, although they also have a structural function, for example, in cell membranes
lipids
organelle that is responsible for photosynthesis. ONLY IN PLANT CELLS
chloroplast
the cell is the ___________ part of a living being with the capacity to nourish, interact and reproduce
smallest
the surface of the ____________ provides the solid support and the elements that are necessary for life
geosphere
all cells contain ______________, _______________ and ______________.
cell membrane, cytoplasm, genetic material
organic biomolecules that are a source of energy and also have a structural function.
carbohydrates
layer that provides shape and rigidity to the cell. ONLY IN PLANT CELLS
cell wall
every cell comes from the _______________ of an existing cell
reproduction
the ___________ is the set of different forms of water that we can find on Earth and is the main source of this essential substance
hydrosphere