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Anonymous users2024-02-15The Mariana Trench is the deepest trench in the world, and there are undiscovered creatures in it.
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Anonymous users2024-02-14How terrifying is 10,000 meters under the sea? Are there living things? Diver: I'm scared.
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Anonymous users2024-02-13Cetaceans, dolphins, seals, sea lions, dugongs, horseshoe crabs, shrimps, crabs, turtles, mussels, pearl oysters, scallops, oysters, clams, squid, octopuses, turtles, sea otters, sponges, anemones, etc. A total of 20,278 species of marine life have been recorded in the waters under China's jurisdiction. These sea creatures belong to 5 kingdoms and 44 phyla.
Among them, the animal kingdom has the largest number of species (12,794 species) and the prokaryotic kingdom has the least (229 species).
Cetaceans, dolphins, seals, sea lions, dugongs, horseshoe crabs, shrimps, crabs, turtles, mussels, pearl oysters, scallops, oysters, clams, squid, octopuses, turtles, sea otters, sponges, anemones, etc. A total of 20,278 species of marine life have been recorded in the waters under China's jurisdiction. These sea creatures belong to 5 kingdoms and 44 phyla.
Among them, the animal kingdom has the largest number of species (12,794 species) and the prokaryotic kingdom has the least (229 species).
1. Cetaceans: The most successful marine mammals on Earth are cetaceans. Their bodies and limb bones have evolved to resemble fishes, and it's no wonder they're commonly known as whales.
2. Dolphins: Dolphins are a general term for a class of aquatic mammals in the dolphin family, which is a small or medium-sized toothed whale, which lives widely in the world's oceans, and is also distributed in brackish and fresh water near the inland sea and river estuary, and individual species are found in inland rivers.
3. Seal: Seal is a general term for the pinniped subspecies seals. The body of the seal is thick and round, spindle-shaped.
The whole body is covered with short hair, the back is blue-gray, and the belly is creamy yellow with blue-black spots. The head is nearly rounded, the eyes are large and rounded, there is no external auricle, the snout is short and broad, and the upper lip tentacles are long, thick and hard, in the shape of a rosary.
4. Sea lions: Sea lions include 5 genera and 7 species. Distributed in the Northern Hemisphere. They are small in size and generally do not exceed 2 meters in length. The northern sea lion is the largest species of sea lions. Males are 310-350 cm long and weigh more than 1000 kg.
5. Dugong: The dugong is a marine herbivorous mammal. The body of the dugong is spindle-shaped, about 3 meters long, and weighs 300-500 kilograms.
There are sparse short body hairs all over the body. There is no pronounced neck, the head is small, the upper lip is horseshoe-shaped, the snout is protruding with bristles, and two nearly circular breathing holes are placed side by side at the front of the top of the head; There is no external auricle, and the ear hole is located behind the eye.
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Anonymous users2024-02-12It includes benthic plants (almost all macroalgae and seed plants such as mangroves), benthic animals (sponges, coelenters, links, linears, software, crustaceans, echinoderms, vertebrates and other phyla). According to their relationship with the substrate, benthic organisms can be divided into three major life types: above-bottom, inner-bottom and bottom-swimming. There are also intertidal organisms on the shore. It lives on the hard seabed.
It includes animals that live sessile on various substrates (e.g., anemones, hydras, barnacles, oysters, stalk sea squirts), attached (e.g., purple mussels, attached diatoms, macroalgae), and creeping seabed (e.g., horse manure sea urchins, sea cucumbers, and red snails). The sedentary animals have degraded locomotor organs, but have well-developed tactile organs, passive feeding, and larvae are planktonic and rely on ocean currents to expand their distribution area. Organisms that are sessile or attached to the bottom of ships, buoys, factory sewage pipes, offshore oil platforms, and other offshore facilities are known as fouling organisms (including microorganisms, algae, and animals).
They are hazardous to traffic, military and production.
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Anonymous users2024-02-11Why do so many creatures live in the sea? What secrets are hidden in the depths of the sea?
Underwater animals include: sharks, whales.
Dolphins, jellyfish, manatees, etc., their characteristics are as follows: >>>More
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Love is an emotion, and it is not necessarily limited to men and women. It is an emotion of mutual affection, and it can affect all of you. The meaning of existence lies in the fact that we can intentionally integrate family affection and love as one, and get along with the other half.
The nutrients are complete and can improve soil compaction caused by the use of chemical fertilizers. Improve the physical and chemical properties of the soil, and enhance the ability of soil to retain water, fertilizer and fertilizer. After the beneficial microorganisms in the bio-organic fertilizer enter the soil, the microorganisms in the soil form a symbiotic proliferative relationship with each other, control the growth of harmful bacteria, and transform them into beneficial bacteria. >>>More
Normal plasmids are closed double-stranded DNA. During electrophoresis, the plasmid may be loop-opened, or the loop-opening spiral may become linear. These three forms have different separation rates and different separation speeds during electrophoresis, and are divided into three bands. >>>More