A Swim Bladder is not present in cartilaginous fishes. Also called a fish maw or gas bladder the swim bladder is a gas-filled bladder that allows many bony fish to control their buoyancy by filling or releasing gas form the bladder. This allows them to change bouyancy without wasting metabolic energy by swimming.
Answer:
The major sources of evidence of evolution are: Anatomy, Molecular Biology, Biogeography, Fossils, and Direct observation.
Explanation:
<span>The answer would be: host symbionts with colorful photosynthetic pigments
Coral can host symbionts that will help in their growth. There are algae that could live on the coral surface, giving them some of the energy from photosynthesis and help in calcification while the coral protects the algae. </span>The symbiosis will be formed when nearby algae attach to the corals. A stress on the coral can cause the algae to eject the algae.
The reason for the shift of mammals from the ecosystem due to increased temperatures and decreased rainfall is the change in the abiotic factors of that region.
Ecosystem is defined as how the living species of an area interact within themselves as well as the with the abiotic factors of the region.
Abiotic factors are the non-living things present in an area. These are the soil, mountains, temperature, sun, water, etc. The livelihood of a species in an area is influenced by both the living as well as the non-living factors. For example, if an organism can survive only in high rainfall then low amount of rainfall will be unfavorable condition for it to survive and grow efficiently.
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The only way for gases to diffuse in and out of the leaf is though small openings on the underside of the leaf, the stomata
