Contrast the two major groups of prokaryotes.

Chemotaxis is a process by which bacteria select one: a. respond to the presence of autoinducer molecules. b. move toward an attractant or away from a repellent. c. move on solid surfaces by means of type iv fimbriae. d. avoid phagocytosis.

These movable segments are now called A) DNA sequencing. B) recombinant DNA. C) transposons or jumping genes. D) transgenic or McClintock plasmids.

The esophagus, stomach, and small intestines all function together to digest food and absorb nutrients. Which level of organization is being described? tissue organism organ organ system

Explain how Earth's spheres may be affected by the droughts brought on by El Niño.

Which concept reflects the increasing numbers of species present in an area that includes a wide variety of habitats, vegetation types, and small-scale environments? a. beta-diversity b. conservation biology c. alpha-diversity d. landscape ecology

Which of the following is a characteristic of protein

Ticks suck blood from a host organism. This is an example of A) commensalism. B) competition. C) mutualism. Eliminate D) parasitism.

What is an important characteristics of the plant cell wall?

Which of these resources cannot be renewed? biomass, hydropower, geothermal, fossil fuel

Which of the following statements justifies that meiosis is a reduction division? Meiosis results in the formation of gametes. Meiosis produces recombinant chromosomes. Meiosis begins with a diploid cell, but produces four haploid cells.