Light reaches organisms in the photic zone, where microscopic Phytoplankton and multicellular algae provide food for the animal community. Light levels in aphotic zone are too low to support photosynthesis. The seafloor is called the Benthic realm. Fishes and marine mammals swim in open water known as the Pelagic realm. A distinctive Biome called an Estuary is found where a freshwater stream or river merges with the ocean.
Photic zone is the surface layer of the ocean that receives sunlight, which means it permits photosynthesis by plants and phytoplankton. In aphotic zone , there is no light, therefore the phytoplankton and algae can not grow and undertake photosynthesis, the carbon dioxide is accumulated, there is less Oxygen and the pH is lower than in the photic zone.
The uterus is part of the female reproductive system. It looks like an inverted pear. It is also known as the womb. Normally, the size of the uterus is about as big as a fist but when a female is pregnant, it can stretch many times its size to accommodate the growing fetus.
The hypothalamus is the part of the brain. It is located at the bottom region of the brain typically near the pituitary gland. It plays important functions like releasing hormones, and regulating the body temperature.
It has connection with the autonomic nervous system. It can send signals to various parts of the body and can influence the functions such as heart rate, perspiration, digestion which are not under the voluntary control of the organism.
The correct order of phases in the menstrual cycle is; menses, .estrogenic phase, ovulation, and progestational phase. The menstrual cycle is complex and is controlled by many different glands and hormones that these glands produce. There are four phases of menstrual cycle; namely, menstruation, the follicular phase, ovulation and the luteal phase.
The correct answer is letter c. a salinity of less than 1%. Fresh water is considered to be any natural occurring streams of water on the surface of the Earth. Sea water and Brackish waters are not to be considered fresh water. The Fresh Water Biome are home to many fresh water fishes that are not compatible in water forms with high salinity levels.