Answer:
Echinoderms have a calcium carbonate endoskeleton, and vertebrates have a bony endoskeleton made of calcium phosphate. have bones mostly made of calcium phosphate.
Explanation:therefore, echinoderms do not have true endoskeletons.
Answer:
depends on the part
Explanation:
if the part is at the end of the small i testine then most of the digestion woul have aldready taken place. However at the centre or newr the centre the digestion will be hindered it may also lead to ulcers.
An object in <u>black</u> emits radiation at the same rate it absorbs solar energy
Explanation:
All body emits radiation following their temperature. E.g. colder bodies emit radiations with a longer wavelength, while the hot bodies emit radiation with short wavelength and higher frequencies.
A black body can be considered as an ideal body that absorbs all the energy incident on it and then emits all the radiation absorbed in a continuous spectrum depending on its temperature. In nature, stars behave similarly to black bodies. They emit all the radiation in a continuous spectrum depending on temperature. E.g. Cooler stars emit wavelength in the red and infra spectrum, while high-temperature stars emit lights in blue and UV wavelength
False the answer is false
Photosynthesis is how plants eat. plants/single cell organisms absorb sun light and transfer it into food/energy that it can use, phytoplankton for example use photosynthesis to eat, and they produce oxygen as a by-product of the photosynthesis. Trees and other plants to the same thing.
