O2 output method 

TLS Online TPP Program

#Id: 7604

#Unit 5. Developmental Biology

MMP2 is a protein that digests extracellular matrices (such as the zona) and may be responsible for digesting a pathway to the oocyte Acrosin bind secondarily to the zona, keeping the sperm in the channel it creates

TLS Online TPP Program

#Id: 7762

#Unit 1. Molecules and their Interaction Relevant to Biology

In a covalent bond, electrons are shared between atoms. In an ionic bond, electrons are transferred between atoms.

TLS Online TPP Program

#Id: 5950

#Unit 10. Ecological Principles

Trophic-level transfer efficiency is low for the two reasons

a- Many organisms cannot digest all their prey.  

b- Much of the energy assimilated by animals is used in maintenance.

c- The dead organisms and feces become dinner for decomposers.

TLS Online TPP Program

#Id: 7985

#Unit 10. Ecological Principles

Some plants of arid habitats close their stomata in the day and open them at night, when it is cooler.

TLS Online TPP Program

#Id: 4512

#Unit 13. Methods in Biology