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vredina [299]
3 years ago
14

Sponges are called the simplest animals because they: Have no nerves Have no muscles Have no internal organs, including a brain

All of the above None of the above
Biology
1 answer:
katrin2010 [14]3 years ago
6 0

Answer:

All of the above

Explanation:

This is because lack nerves, muscles, internal organs including brain and that is why they are refered to simplest animals. Sponges are multicellular animals that belong the phylum porifera and clade metazoa. Water current from the water bodies carry food to sponges and the same water current take away waste products. They have pores that allow water to channel through their bodies.

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The Moon and stars seem to move from _____________________________ to __________________________________ across the night sky
seraphim [82]

Answer:

east to west

Explanation:

The stars and moon are the celestial bodies which are located at distant.

The distance of stars vary but moon and sun remain same. As our Earth rotates at its own axis, other celestial bdies seem to move.

As Earth spins from west to east, the stars and moon seems to move from east to west direction at night and same with Sun, it also seem to move from east to west.

Hence, the correct option is east to west.

5 0
3 years ago
. How long has it taken barren rock to become paradise?
Simora [160]

Answer:

Volcanoes are created over approximately 10,000-500,000 years by thousands of eruptions -- each lava flow covering the one before it. In the case of oceanic island volcanoes, lava erupts first from fissures, or cracks, on the deep ocean floor. The flows continue to build up and finally an island emerges from the sea.

Explanation:

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4 0
3 years ago
Andi performs the calculation that is shown below.
Sladkaya [172]
The answer would be (A)
4 0
3 years ago
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Theodor Schwann and Matthias Schleiden were major contributors to the Cell Theory as we know it. In 1839 Schwann published a boo
zaharov [31]

Answer:

D

Explanation:

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7 0
4 years ago
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Patches of fibrocartilage formed in the healing of a fracture are called __________, whereas the bony collar formed around the f
SashulF [63]

Answer:

Patches of fibrocartilage formed in the healing of a fracture are called <u>soft callus</u>, whereas the bony collar formed around the fracture is called <u>hard callus</u>.

Explanation:

In the fibrocartilage or soft bone callus phase, the necrotic bone is removed by osteoclastia and dead soft tissues are being removed by macrophages. The fibroblasts are activated and a granulation tissue is generated that supposes the appearance of new vessels and, with them, the arrival of more connective tissue cells. A tissue called fibrous callus or fibrocartilage begins to form, composed of a poorly structured amalgam of fibrous tissue, cartilage, and amorphous bone.In hard callus, bone and later cartilage are deposited in the growing historical mass. The two collars of callus,  fixed to the bone at some distance from the fracture, they grow upwards and towards each other, forming an arc  on focus.

7 0
3 years ago
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