What are seaweeds? What are the classifications of seaweeds? What will be an ideal response?
ANS:Answer
should include:
? Seaweeds are nonvascular, photosynthetic organisms. They are a type of algae. They
share similar structures to leaves, stems, and roots. Many thrive in temperature, nutrientrich
waters.
? There are two categories of seaweeds?phaeophytes and rhodophytes. They are
classified by their accessory pigments.
? Phaeophytes are brown algae. Nearly all living species are marine. These include the
largest of algae, kelp. Some of the phaeophytes are seasonal. Some are able to grow in
water 35 meters deep. Phaeophytes dominate in temperate and subpolar regions.
? Rhodophytes are red algae. This classification group contains most species of seaweeds.
There are more rhodophyte species than other algae groups combined.
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Which of the following species is the oxidizing agent? 2 CuBr ? ? 2Cu + Br2
A. Cu B. CuBr C. Cu+ D. Br- E. Br2
Totality is not completely dark during a lunar eclipse because
A) of the Sun's corona. B) the line between umbra and penumbra is not sharp. C) of light refracted by the Earth's atmosphere. D) of tapering of sunlight due to the Sun's large size. E) the Moon is not directly in the Earth's shadow.
Humid subtropical hot-summer climates receive ________ precipitation during the summer and ________ precipitation in winter
A) convectional; frontal B) frontal; convectional C) orographic; frontal D) convectional; ITCZ
Worldwide, the most widely used renewable energy source is ________
A) hydroelectric B) biomass C) solar D) wind E) nuclear