Choose the correct statement 

a. The nucleosome is a disc with DNA organized into 22/3 turns around the core .

b. The nucleosome is a disc with DNA organized into 12/3 turns around the surface.

c. The nucleosome is a disc of 11 nm diameter and 6 nm height.

d. The nucleosome is a cylinder of 6 nm diameter and 11 nm height.

#Question id: 11382

#Unit 10. Ecological Principles

Ecologist has proposed following explanation to lead biodiversity at tropic.

a) Higher productivity in the tropics allows for more species

b)  Environments are more stable and predictable in the tropics, with fairly constant temperatures and rainfall levels year-round

c) Predators and pathogens limit competition in the tropics, which allows more species to coexist

d) High evolutionary speed at tropic than temperate

#Question id: 21279

#Unit 12. Applied Biology

#Question id: 1377

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements apply to both eukaryotic cell walls and animal cell extracellular matrices? Please select all that apply.

a) They are inflexible structures that support cells.

b) They are built to a common overall structure that can be described as 'fibres in a matrix'.

c) Their protein components are synthesized by ribosomes of the rough endoplasmic reticulum.

d) They limit the diffusion of ions and small molecules into the cell.

#Question id: 4942

#Unit 11. Evolution and Behavior

Which of the following has not yet been synthesized in laboratory experiments studying the origin of life?

#Question id: 11917

#Unit 10. Ecological Principles

Which one of the following  features of an early community?