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Rays
Rays are cartilaginous fishes related to sharks with flat, disk-like bodies.
1,174 Questions
How does a ray differ from a line?
A ray starts at a point and extends forever in ONE direction. A line starts at a point and extends forever in TWO directions.
stingrays are cartilaginous ..quick answer : Stingrays have no bones in their body
The stingrays are a family---Dasyatidae---of rays and are a cartilaginous fish related to sharks , cartilaginous fish are jawed fish and skeletons made of cartilage rather than bone. The skeleton is cartilaginous. The notochord--A flexible rod-like structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates, which is present in the young, is gradually replaced by cartilage.
The class Chondrichthyes ( Cartilaginous fish) also lack ribs, so if they left the water, the larger species's own body weight would crush their internal organs long before they would suffocate.
since they do not have bones and therefore no bone marrow, red blood cells are produced in the spleen of cartilaginous fish as well as in special tissue around the gonads
Xray speed in a vacum is equal to the spped of visible light, 186,000 miles per second, or 300,000 km per second. Outside of a vacum, x-ray waves are subject to various factors that change speed.
A ray line has an endpoint with the point on the left side, connected to a line with a arrow pointing towards the right side.
What is the relationship between a manta ray and a remora?
A ray and Remoras show an example of Commensalism. The way that Remoras
benefit from a ray is, the Remora gets a ride from the ray by sucking on the ray's skin. The other way it benefits is that it eats scraps of what the Ray eats, and that's the answer.
Does skin block gamma rays from getting in the body?
No. Gamma rays are similar to X-rays in that they can penetrate deep into the human body. Gamma rays are electromagnetic radiation which is produced by the decay of some radioisotopes and from nuclear reactions. A form of radiation which will be blocked by the skin is alpha particles, which are helium nuclei.
What are the skeletons of skates and rays made from?
sharks, skates, and rays have skeletons made of cartilidge
What jobs were in 1900 that don't exist anymore?
A street sweeper who would actually walk in the street. Another one is the guy who lit all the gas street lamps, the town crier who told of important news, the coal tender on a steam locomotive.
Gamma rays originate from nuclear reactions, such as those in supernovae, quasars, or radioactive decay. X-rays are produced by high-energy processes, such as those in black holes, neutron stars, and certain astronomical phenomena. Both gamma rays and x-rays are forms of electromagnetic radiation with different wavelengths and energies.
This usually refers to a light ray that hits a surface at 90 degrees, or perpendicular. In physical science the word "normal" is often used to mean perpendicular.
What is the Stingray's environment?
The stingray's environment is in the Pacific Ocean. It lives under water.
