Answer is B. Porifera
Members of the phylum porifera includes animals which lack tissues. These animals are also called sponges. These are the simplest multicellular animals. Even though they are multicellular, they do not have any tissues or organs. They have cellular level of body organization. Sponges are aquatic animals and water plays a major role in the feeding, exchange of gases and as well as excretion.
Answer:
Seismic waves, Outer, Mantle
Explanation:
P-waves vibrate longitudinally to the direction of propagation while S-waves vibrate vertically to direction of propagation. This is why S-waves are called shear waves while P-waves are compressional waves. S-waves are the main cause of destruction in an earthquake and are slower than P-waves.
The wave movement of P-waves allows them to pass through liquids and gases while S-waves cannot. Due to this differential phenomenon of these waves, the reflection of P –waves and S-waves after an earthquake – and as their vibrations are picked up by seismographs around the earth - enabled scientists to determine the properties of the layers of the earth’’s interior.
Observation the action or process of observing something or someone carefully or in order to gain information:
Non point source pollution is a greater threat than point source pollution because non point source pollution disrupts the water cycle.
Answer:
A energia térmica não pode ser criada nem destruída, apenas convertida em outras formas de energia.
Explicação:
Os princípios da termodinâmica nos levam a concluir que a energia térmica não pode ser criada nem destruída apenas convertida em outras formas de energia. Essa energia térmica pode ser convertida em energia mecânica, elétrica e outras formas de energia. A energia térmica também é liberada quando o alimento ingerido pelos herbívoros, apenas 10% da energia é transferida de um nível trófico para outro, enquanto 90% da energia é liberada para a atmosfera.
