Shapley found the distance to the center of the galaxy by studying the distance to open clusters.
a. True
b. False
Indicate whether the statement is true or false
Question 2
A ZAMS star evolves __________ and to the __________ on the H-R diagram because ________________.
a. downward, left, the core expands which causes the outer layers to expand b. upward, right, the core contracts which causes the outer layers to expand
c. upward, left, the core expands which causes the outer layers to contract d. downward, right, the core contracts which causes the outer layers to contract
Open space is found in a Lodgepole pine stand after thinning.
Studying the Canopy
This jumping spider's main ocelli (center pair) are very acute.
Geoffroy's tamarin (Saguinus geoffroyi), also known as the Panamanian, red-crested or rufous-na
A spider from the genus Selenops, which have been found to be able to glide thro
Valves in veins open to permit blood flow, close to prevent backflow.