Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,

#Question id: 16089

#Unit 7. System Physiology – Animal

#Question id: 3408

#Unit 11. Evolution and Behavior

New species originated via punctuated equilibrium having some characterstic feature

a. occur during cladogenesis from ancestral species

b. subpopulation of ancestral species transform in to new species

c. Morphological change is sudden and rapid

d. continuously change in their morphology

which above statement is correct

#Question id: 19456

#Unit 13. Methods in Biology

#Question id: 15882

#Unit 12. Applied Biology

#Question id: 1378

#Unit 4. Cell Communication and Cell Signaling

Which of the following apply to fibronectins? Please select all that apply.

a) They are disulphide linked dimers, with each polypeptide composed of a number of binding domains joined together by short flexible segments.

b) They have an essential role in linking the extracellular matrix to its underlying cells.

c) Like integrins, fibronectins are directly connected to the cytoskeleton.

d) They participate in 'inside out' and 'outside in' signalling mechanisms.