No two different species can share the same niche but can have similar niches,  this is because of competition for resources like food, space etc

Two species cannot coexist permanently in a community if their niches are  identical

TLS Online TPP Program

#Id: 10565

#Unit 4. Cell Communication and Cell Signaling

Ca2+ influx causes the cell and its organelles to swell

and burst, releasing its contents into the extracellular space which trigger activation of immune-system cells

and cause tissue inflammation and damage

TLS Online TPP Program

#Id: 1595

#Unit 5. Developmental Biology

The primitive streak defines the major body axes of the avian embryo. 

TLS Online TPP Program

#Id: 10112

#Unit 4. Cell Communication and Cell Signaling

Ions, low-MW precursors of cellular macromolecules, products of intermediary metabolism, & small intracellular signaling molecules can pass from cell to cell through gap junctions.

TLS Online TPP Program

#Id: 8475

#Unit 1. Molecules and their Interaction Relevant to Biology

Repeat period is shorter for the parallel conformation (6.5 Å, vs. 7 Å for antiparallel)

TLS Online TPP Program

#Id: 1699

#Unit 4. Cell Communication and Cell Signaling

Granulocytes

1. Neutrophils

2. Basophils

3. Mast cells

4. Eosinophils