The root system of a grass plant interacts with the vascular system to increase the ability of the plant to Group of answer choices a. absorb carbon dioxide for photosynthesis
b. manufacture pigments for protection
c. obtain nutrient molecules
d. carry on gas exchange and absorb inorganic substances

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.