Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Unlike other animals, they lack true tissues and organs, and have no body symmetry.
The shapes of their bodies are adapted for maximal efficiency of water
flow through the central cavity, where it deposits nutrients, and leaves
through a hole called the osculum. Many sponges have internal skeletons of spongin and/or spicules of calcium carbonate or silicon dioxide. All sponges are sessile
aquatic animals. Although there are freshwater species, the great
majority are marine (salt water) species, ranging from tidal zones to
depths exceeding 8,800 m (5.5 mi).
Answer:
macronutrients
Explanation:
macronutrients are important for growing plants. the main macronutrients are nitrogen, Potassium, and phosphorus.
Answer:
A
Explanation:
The components of salt water are chemically combined together and looks throughout, forming a homogeneous mixture.
The answer is B proteins.
