Why is it necessary for the trachea to have rings of cartilage in its walls?

Which life-form existed on Earth for the shortest period of time? dinosaurs trilobites ammonoids placoderm fish

What is plimsoll line?

During what part of the water cycle does the water from the surface of earth get back into the atmosphere? * precipitation run off condensation evaporation

5. There is a Y-shaped replication fork on each side of each replication bubble. What are the sides of the replication fork called?

What develops when cells undergo metastasis

Read the list of common household substances. Antacid, orange juice, toothpaste, vinegar Which of these substances are likely to have a bitter taste? Antacid, vinegar Antacid, toothpaste Orange juice, vinegar Orange juice, toothpaste

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs

Imagine a protein that has been engineered to contain a nuclear localization signal, a nuclear export signal, a C-terminal peroxisomal targeting sequence, and a canonical endoplasmic reticulum (ER) signal sequence.

Which organelle receives protein from endoplasmic reticulum and sorts and packages it for delivery outside cell?

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.