Answer: (D) all of the above.
Explanation:
The kidneys remove wastes and <u>extra water</u> from the blood to form urine. Urine flows from the kidneys to the bladder through the ureters.
<u>Ammonia is an extremely toxic base and its accumulation in the body would quickly be fatal.</u> The liver contains a system of carrier molecules and enzymes which quickly converts the ammonia (and carbon dioxide) into urea (waste).
Calcium excretion in the urine is a function of the balance between the calcium load <u>filtered by the kidneys</u> and the efficiency of reabsorption from the renal tubules.
Answer: Aquatic fossils would be found near the bottom of the core sampleRock cores provide valuable sources of information to geologists because it presents very accurate measurements of porosity of the rock. If a geologist obtained the rock core from a hillside and found aquatic fossils near the bottom of the core sample, he can conclude that this hillside was once covered by a body of water.
Instead of roots, threadlike structures called rhizoids.
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Answer:
In most cells, DNA directs the production of a molecule of mRNA which then enters a ribosome. The ribosome produces the final product, a protein. Retroviruses do the opposite. They use the enzyme reverse transcriptase to use a template of mRNA to produce DNA.
Explanation:
The central dogma of molecular biology describes how a cell uses its genetic information to synthesize a protein. The first step called 'transcription' consists of using an RNA polymerase enzyme and a fragment of DNA (i.e., gene) as a template to synthesize an RNA molecule, usually a messenger RNA (mRNA). Subsequently, the genetic code in the mRNA sequence is read by the ribosomes in order to produce a protein, a process known as 'translation'. Retroviruses are viruses that have the ability to integrate into the host genome by using a reverse transcriptase enzyme that allows reverse transcription of mRNA to complementary DNA, which then integrates into the host's genome.
Following are the definitions matched with the words given
Explanation:
Social behavior
having a complex social structure marked by role specializations.
Hydrodynamic :
related to movement of fluids or related to objects moving in fluids.
Forage :
to forage is to search for and collect food.
Migrate :
to move from one location to another seasonally.
Eusocial :
the interaction between two or more members of the same species.<u> These interactions are highly ritualized and follow the same pattern every time.</u>
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