It is believed that the coelacanths and lungfish (lobed fin fishes) represent a
ID: 213546 • Letter: I
Question
It is believed that the coelacanths and lungfish (lobed fin fishes) represent a crucial link between other fishes and tetrapods. What is the major feature in these fish in support of this hypothesis?
a) Their fins have skeletal structures analogous to amphibian limbs
b) Like amphibians, they are tied to the water for reproduction
c) They have highly evolved nervous and circulatory systems
d) Their fins have skeletal structures homologous to tetrapods limbs
e) They are all correct
Which of the following is not true about the connection between global warming and diatoms:
a) bulk carbon sequestration by diatoms cannot persist in low nutrient areas.
b) diatoms sequester CO2 from the atmosphere and store it in their bodies.
c) warming surface waters encourage upwelling of nutrient rich deep water.
d) There is a positive feedback loop of warming causing further warming due to the effects on the diatom population.
Which of the following is NOT part of Darwin's theory of evolution?
a) More individuals of a species are produced than can be supported by available resources.
b) Natural selection can cause changes within species, but it cannot explain modifications that lead to new species.
c) Characteristics that allow individuals to compete successfully for limited resources tend to increase in frequency from one generation to the next.
d) Populations of organisms change through time.
e) None of the alternatives are correct.
The female gametes of angiosperm plants are located in...
a) Ovaries
b)Cones
c)Stamens
Explanation / Answer
1.It is believed that the coelacanths and lungfish (lobed fin fishes) represent a crucial link between other fishes and tetrapods because their fins have skeletal structures analogous to amphibian limbs.
2. Not sure. After study will add.
3. Option b) Natural selection can cause changes within species, but it cannot explain modifications that lead to new species is NOT part of Darwin's theory of evolution.
4.The female gametes of angiosperm plants are located in ovaries. Angiosperm plants are flowering plants which contain female gametes or eggs or ova in the ovary which become a fruit after fertilization and female gametes become seeds.
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