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3 years ago

How do the four female hormones control the menstrual cycle

2 answers:

7 0

Answer: The menstrual cycle is regulated by hormones. Luteinizing hormone and follicle-stimulating hormone, which are produced by the pituitary gland, promote ovulation and stimulate the ovaries to produce estrogen and progesterone.There are four major hormones (chemicals that stimulate or regulate the activity of cells or organs) involved in the menstrual cycle: follicle-stimulating hormone, luteinizing hormone, estrogen, and progesterone. hope this helps have a nice night❤️❤️❤️

Explanation:

never [62]3 years ago

3 0

The correct answer is A. It emphasizes that Japan had purposely deceived the United States

Explanation:

The excerpt presented belongs to toFranklin Roosevelt's speech in reference to the Pearl Harbor attack that took place in 1941 as the Japanese forces attacked one military based on Hawaii. In this speech Roosevelt states "the distance of Hawaii from Japan makes it obvious that the attack was deliberately planned" that shows from Roosevelt's perspective the attack was not spontaneous but has been planned which is emphasize with the use of "the distance of Hawaii from Japan" that show the attack followed a plan and especially the use of the word "deliberately" that means carefully considered or discussed before action, which shows the attack had been considered and planned before it occurred and therefore Japan attack on purpose to the U.S. Considering this, it can be concluded Answer:

hope this helps have a nice day❤️❤️❤️

Explanation:

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3 years ago

A. True

AleksAgata [21]

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Which term does the letter X represent in the graphic organizer?

sasho [114]

The Letter X can represent any of the following options but the most correct option is ; Cell ( A )

Although your question lacks the required graphic organizer a general answer is provided within the concept of your question

A graphic organizer is a tool ( learning tool ) used by educators to present contents in a visual and text format. it is mainly used to establish connections between related components or concepts. they can also be referred to as knowledge maps.

The graphic organizer in this question will show the relationship between, cell --> organism --- >biosphere --->Ecosystem

Hence we can conclude that most correct option is ; Cell ( A ).

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2 years ago

Sea organisms rely on the deep oceanic currents for food and nourishment.

Paha777 [63]

Answer: Currents are powerful physical forces in the seas. They move water and heat around the globe, and help determine the chemical make-up of the water column. Currents also are a major factor in ocean ecosystems. Two types of current motion, upwelling and downwelling, strongly influence the distribution and abundance of marine life.

Upwelling

Currents play a huge role in marine productivity, through a process called upwelling. Sea life is concentrated in the sunlit waters near the surface, but most organic matter is far below, in deep waters and on the sea floor. When currents upwell, or flow up to the surface from beneath, they sweep vital nutrients back to where they're needed most.

Nowhere is the link between ocean circulation and productivity more evident than around Antarctica. There, strong currents pump nitrogen and phosphate up from the deep sea to fuel vast blooms of algae and other plants. These plankton are eaten by swarms of shrimp-like crustaceans called krill. Because of upwelling nutrients, krill are abundant enough to feed the largest animals on earth, baleen whales, as well as myriad penguins, seals, and seabirds. In fact, despite the harsh conditions, the biomass of Antarctic krill is thought to be greater than that of any other animal on Earth.

Downwelling

The importance of upwelling to surface organisms is matched by the need of sea bottom life for downwelling, or the sinking of surface water. Surface water can be forced downward by the pressure of the “pile” of water that forms where currents converge or wind drives the sea against a coastline. But for bottom dwellers, the sinking of water caused by density changes is especially noteworthy. The global conveyer belt takes oxygen-rich surface water and flushes it through the deep sea. Without this renewal, the dissolved oxygen in bottom sediments and waters would quickly be used up by the decay of organic matter. Anaerobic bacteria would take over decomposition, leading to a build up of hydrogen sulfide. Few benthic animals would survive such toxic conditions.

In the most extreme cases, a lack of downwelling may lead to mass extinctions. Paleontologists have suggested that 250 million years ago, deep circulation slowed nearly to a stop, and the ocean began to stagnate. Low oxygen, sulfide and methane-rich waters filled the ocean deeps and then spread onto the continental shelves, wiping out 95% of all marine species in the greatest extinction event in Earth history.

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