Hello!
In order for an animal to be a vertebrate, it must have a backbone. As can clearly be seen in any image of a sponge, it is a highly asymmetrical simple animal and does not have a backbone. Therefore, a breadcrumb sponge is not a vertebrate, or is an invertebrate.
I hope this helped!
Answer: In solution because they have dissaolved and mixed with water so they are carried down the river.
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I think the two sources would be drip irrigation which is like a river, lake, groundwater, etc... The second source could be is making a new irragation system that could deliver water faster.
Answer:
The Arctic and Antarctic have the same variations of day and night, but they are in opposite parts of the year.
Explanation:
The Arctic is the region at and around the Northern Pole, while the Antarctic is the continent at and around the Southern Pole. These are the two coldest areas on Earth, and even in what is considered summer the temperatures are very low. They have a lot of similarities but also some differences.
One feature that falls in both categories, similarity, and difference, are the variations of day and night. The similarity is in the fact that both regions experience sunlight constantly for half a year, and then experience night constantly for half a year. The difference though is in the fact that they occur in opposite parts of the year. When the Arctic has half a year of light, the Antarctic has half a year of night and vice versa, and this is due to the tilted axis of Earth.
