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TLS Online TPP Program

#Question id: 5006

The oxygen revolution changed Earthʹs environment dramatically. Which of the following adaptations took advantage of the presence of free oxygen in the oceans and atmosphere?

#Unit 11. Evolution and Behavior

  1. the evolution of cellular respiration, which used oxygen to help harvest energy from organic molecules

  2. the persistence of some animal groups in anaerobic habitats

  3. the evolution of photosynthetic pigments that protected early algae from the corrosive effects of oxygen

  4. the evolution of chloroplasts after early protists incorporated photosynthetic cyanobacteria

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TLS Online TPP Program

#Question id: 19917

#Unit 13. Methods in Biology

Antigen-Antibody interactions are__
TLS Online TPP Program

#Question id: 1787

#Unit 4. Cell Communication and Cell Signaling

The classical and alternative pathways meet at complement component
TLS Online TPP Program

#Question id: 4567

#Unit 11. Evolution and Behavior

Charles Darwin was the first person to propose
TLS Online TPP Program

#Question id: 11222

#Unit 7. System Physiology – Animal

A chemical that affects neuronal function but is not stored in presynaptic vesicles is ________.
TLS Online TPP Program

#Question id: 34167

#Unit 7. System Physiology – Animal

I. The adrenal medulla does not regenerate, but when the inner two zones of the cortex are removed, a new ZF and ZR regenerate from glomerular cells attached to the capsule.
II. Immediately after hypophysectomy, the ZF and ZR begin to atrophy, whereas the ZG is unchanged because of the action of angiotensin II on this zone. 
III. The ability to secrete aldosterone and conserve Na+ is normal for some time after hypophysectomy, but in longstanding hypopituitarism, aldosterone deficiency may develop, apparently because of the absence of a pituitary factor that maintains the responsiveness of the zona glomerulosa.