According to the food web shown, which organism is both a primary consumer and a secondary consumer?

A. fish

B. other seals

C. other herbivorous zooplankton

D. krill

Suppose you want to study the transcription in vitro of one particular gene in a dna molecule that contains several genes and promoters.

How do I use eukaryote in a sentence

In pea plants, purple flowers ("P") are dominant to white followers ("p"). A white-flowered plant is crossed with a plant that is heterozygous for the trait. What percentage of the offspring will have purple flowers?

Biotic factors cannot live without abiotic factors. True or false

13. What is an entomologist? 14. How do scientists test theories? 15. Write down ONE of Kettlewell's predictions. 16. Dark moths were found in what parts of the country? 17. How did Kettlewell directly study the moths? 18.

Many virues infect only a certain type of cell because they bind to certain

What can be bio-genetically grow tissues and organs

Whole muscles can respond in a graded fashion to stimuli by varying Select one: a. the force of contraction of individual muscle fibers. b. the number of motor units recruited. c. the amplitude of the action potential. d. the frequency of stimulus.

Why does the oxygen atom in water a molecule have a negative charge

What is continental crust and ocean crust composed of