When scientists raise newly hatched birds that have lost their parents, the scientists often use puppet-like devices to feed and care for the young birds. these puppet-like devices look like adult birds of the same species as the newly hatched birds. why do the scientists use these puppet-like devices?

This is a coral reef ecosystem. many biotic and abiotic factors affect the health of this ecosystem. which set correctly pairs a biotic factor and an abiotic factor?

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Plants that have reproductive structures called cones are?