OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nutrients are more abundant in deep, calm waters than in warm, turbid waters
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the photosynthetic pigments of kelp are more efficient in the depths than in the shallows
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rocky terrain, the preferred substrate of kelp, is only found in deep, calm waters
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the holdfasts are less likely to be ripped off the rocks in calm waters than in stormy waters
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Detailed explanation-1: -Because kelp attaches to the seafloor and eventually grows to the water’s surface and relies on sunlight to generate food and energy, kelp forests are always coastal and require shallow, relatively clear water.
Detailed explanation-2: -Instead of roots, leaves and a stem, kelp have holdfasts, blades and a stipe – all of which help make them uniquely adapted to living life below the waves. Like a root, the holdfast acts as an anchor, helping the kelp sit tight against the ebb and flow of daily tides.
Detailed explanation-3: -Kelp forests grow best in nutrient-rich, clear waters whose temperatures are between 42–72 degrees F (5–20 degrees C). The water must be clear so that sunlight can reach the ocean floor where the kelp life begins. If the water is too warm (warmer than 20 degrees), the kelp does not thrive as well.
Detailed explanation-4: -Many organisms use the thick blades as a safe shelter for their young from predators or even rough storms. These underwater towers of kelp provide food, shelter, and protection for all kinds of marine life, including seals, sea lions, sea otters, invertebrates, fish, whales, birds, and more.