The "spikes" on the corona virus act like which lock into receptors on the lungs and elsewhere. A) QR codes
B) keys
C) bullets
D) needles

Which one of these is a involving in both sexual and asexual reproduction

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.

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?