Explanation:
Compact bone is dense and composed of osteons, while spongy bone is less dense and made up of trabeculae. Blood vessels and nerves enter the bone through the nutrient foramina to nourish and innervate bones.
<u>The impact of reef erosion on the coral reef community:</u>
The reef erosion takes place in the shores, and which the coastal properties are being more exposed to the damaging effect of the waves. They become colonised with the help of varied range of the organisms, that includes algae, corals and large diversity of species of fishes. Artificial reefs functions as the inundated breakwater. Then will dissipate the wave energy, which can further reduce the coral erosion and thus will protect the secured boats.
Answer: D. helps in digestion
Explanation: Gastric juice in the stomach contains HCL which creates an acidic condition(pH1.5-2.0) which is optimal for the action of enzymes in the stomach. HCL stops the activity of salivary amylase & helps to kill bacteria in food. It doesn’t help in digestion cuz it is not an enzyme.
Answer:Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly. Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly.Semipermeable membranes, also termed selectively permeable membranes or partially permeable membranes, allow certain molecules or ions to pass through by diffusion.
Explanation: hope that helps
