HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP Describe the following words as they relate to air masses: Continental, Maritime, Tropical, Polar and Arctic.

Which of the following statements is true? a. the main cause for speciation is an increase in gene flow. b. organisms that reproduce asexually are not considered part of a species. c. on a tree of life diagram, speciation is shown by the merging of two different lineages. d.the size of the geographic area inhabited by a population can cause speciation.

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)

Are humans interfering with or a part of evolution happening today? find examples of evolution seen in recent history that could be caused by human activity.