Answer:
an animal of the large phylum Chordata, comprising the vertebrates together with the sea squirts and lancelets.
Explanation: That is the definition of a chordata.
The question is incomplete. The complete question is:
Question: If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which of the following would be her most probable and efficient route to establishing a line of such plants?
A) Backtrack through her previous experiments to obtain another plant with the same traits.
B) Breed this plant with another plant with much weaker traits
C) Clone the plant asexually to produce an identical one
D) Force the plant to self-pollinate to obtain an identical one.
Answer:
C) Clone the plant asexually to produce an identical one
Explanation:
Asexual reproduction is a mode of production of progeny from a single parent. It does not include the fusion of male and female gametes. Therefore, the progeny obtained from the asexual reproduction is genetically identical to the parent plant and is called a clone. One of the methods of asexual reproduction in plants includes vegetative propagation.
To maintain desirable traits in progeny, one must perform asexual reproduction in the single parent plant with such traits. The asexual reproduction would produce the progeny having all the desirable genetic traits as that of the parent plant.
molten material
magnetic stripes
Explanation:
The evidence that supports the proposition that sea floor spreading occurs from the options are the magnetic stripes and molten materials.
Harry Hess proposed the concept of sea floor spreading which further led to the development of the theory of plate tectonics.
Some of the evidences used are :
- Magnetic stripes in the rocks of the oceanic crust around spreading centers.
- They were discovered using magnetic survey of the ocean floor.
- Bands of magnetic minerals were seen to be oriented in particular direction and forms different patterns in the rock.
- Also, along spreading centers, molten materials rich in basalt abounds.
- This is because when sea floor begins to move apart, magma upwells from deep within the asthenosphere to replace them.
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Answer:
2
Explanation:
During mitosis, the parent, diploid (2n), cell is divided to create two identical, diploid (2n), daughter cells.
