Which statements about the proteins and glycoproteins in cell surface membranes are correct? 1
They can allow cells to bond together to form tissues.
They can recognise messenger molecules like hormones.
2
3
They can be antigens and allow cell to cell recognition.
A
1, 2 and 3
B
1 and 2 only
С
1 and 3 only
2 and 3 only
D

When is your respiration rate likely to change? a. when your intestines are digesting b. when your cells have too much glucose c. when your cells need more oxygen d. when your liver is working after a meal

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

What will happen to the amount of food available as a pondwater ecosystem ages