Answer:
Pteridophyta Characteristics
Pteridophytes are considered as the first plants to be evolved on land: ...
They are cryptogams, seedless and vascular: ...
They are cryptogams, seedless and vascular: ...
Spores develop in sporangia: ...
Sporangia are produced in groups on sporophylls: ...
Sex organs are multicellular: ...
They show true alternation of generations:
The right answer is a. they contain many small, repeating subunits bonded together.
In chemistry and biology, a polymer is a molecule made up of a chain of similar molecules, called monomers; a polymer is a macromolecule resulting from the assembly of many identical units (monomers), a chemical compound with repetitive structural units.
DNA, glycogen and proteins are polymers
The answer is B solubility in water
Respuesta:
B. pastoreo excesivo de animales de granja
Porque son lugares secos.
Explicación:
Las políticas e infraestructuras que promueven la agricultura en las tierras de pastoreo que no pueden mantener sistemas viables de cultivo, contribuyen a la desertificación. La mayoría de las áreas de tierras secas (el 65%) son tierras de pastoreo que son más adecuadas para el pastoreo sostenible que para el cultivo.
Iron, oxygen and water react with the iron creating a substance known to us as rust.
Hope this helps.