Question 16 According to the food web, which food chain is correct?
А
phytoplankton
- krill – fish
penguins – elephant seal
other herbivorous zooplankton
- fish-
leopard seal –
B
phytoplankton
toothed whales
other herbivorous zooplankton
-
squid
-
penguins
С
phytoplankton
leopard seal
D
phytoplankton
- krill – carnivorous zooplankton – seals – toothed whales

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

Anton created a chart listing different types of materials. which best complete the chart?

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes