DNA can be introduced into bacteria by a mechanism called ____________
(a) transcription.
(b) ligation.
(c) replication.
(d) transformation.
(d)
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How do archaea differ from bacteria? What will be an ideal response?
What occurs when a photosynthetic protist is taken up by a heterotrophic protist and evolves into a chloroplast?
a. multicellularity b. primary endosymbiosis c. colonialism d. chloroplasty e. secondary endosymbiosis
The antidiuretic hormone (ADH) is regulated by negative feedback. Which of the following statements is correct about ADH regulation?
A) A high blood concentration of ADH will make you feel thirsty. B) A high blood concentration of ADH will cause you to excrete dilute urine. C) Drinking a lot of water will increase the rate of ADH production. D) A high blood concentration of ADH will increase the rate of ADH production. E) Loss of water from your bloodstream will limit further production of ADH.
Which of the following examples indicates the level of the best method for protecting biodiversity in the species-rich regions referred to as hot spots?
a. Individual elephants in the savanna b. All of the populations of all species in the savanna c. The entire population of elephants in the savanna d. The populations of all species and the abiotic components of the environment in the savanna.