During what geologic time period did more than 80% of marine species become extinct?

How does the male gamete in flowers differ to the animal male gamete?

In which of the following cells are ribosomes found? A. inside eukaryotic cells B. inside prokaryotic cells C. inside animal cells D. inside plant cells

Describe the craters found on the moon?

During what period of time does the Moon appear in the sky on a new-moon day?

The presence of wastes, such as plastic bags and motor oil, in lakes and streams miles away from developed areas, suggests that a) ecosystems are interconnected and human action can alter ecosystem equilibrium b) recycling programs have failed to

As the total cross-sectional area of blood vessels increases to the maximum area, the velocity is the? A: Highest as found in arteries B: Highest as found in capillaries C: Lowest as found in capillaries D: Lowest as found in veins

The nurse is providing medication teaching to a home care patient of asian descent. which nursing action is culturally appropriate?

Which of the following describes how the Domain Archaea is different from the Domain Bacteria? A.) Its organisms have cells with a nucleus B). Its organisms are multicellular C). Its organisms have cells with a different cell wall D).

Which structure of the nephron reabsorbs the most substances? A. Glomerular capsule B. Loop of Henle C. Ascending limb D. Collecting duct E. Proximal convoluted tubule

A 74-year-old man has experienced a very sudden decrement in attention, language production, and memory. ct scans show localized damage to specific areas of the brain. he has a history of cardiovascular disease. his diagnosis would most likely be