Answer:
At the base of Actinopterygii
*This is a unique characteristic of this group.
Explanation:
A peculiar characteristic organ observed in ray-finned fish (as well as in Sarcopterygii, or lobe-finned fish) but not in cartilaginous fish like shark is the swim bladder.
This organ is often described to be a sac containing gas. It helps these set of fish adjust its buoyancy and its position in the water by regulating the concentration of gas present in it.
The swim bladder is formed as a pouch coming off the embryonic digestive tract, and in chondrosteans and holosteans, with a set of teleosts e.g. the eels, it maintains an open pathway to the esophagus. In majority of the bony fish, the swim bladder is totally sealed off, as gas levels in their swim bladder are regulated by producing gas into the bladder via a network of capillaries, the rete mirabile (Latin word for "marvelous net").
The swim bladder is homologous to the lungs of tetrapods. Since they are formed in the same vein. Few fishes that have an open swim bladder employs it as a breathing organ.
Answer:
Explanation:
methods produce new plants from vegetative parts of the original plant, such as the leaves, stems and roots. These
The energy source that is described in the image is light energy from the sun. The correct option is A.
<h3>What is chloroplast?</h3>
Chloroplast is a cell organelle that contains chlorophyll and aids in the process of photosynthesis in the presence of sunlight using carbon dioxide and water.
The missing image of the question is attached as an image.
The energy source that is described in the image is light energy from the sun.
Thus, the correct option is A.
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Answer:
Germ Cell DNA.
Explanation:
Mutations are only passed on to offspring when they occur in germ cell DNA, which are the cells that create sperm or ova.
mutations only occur in germ cells and their DNA.
