Give the name of each stage of mitosis and meiosis at which each of the following events occurs: a. Chromosomes are located in a plane at the center of the spindle. b. The chromosomes move away from the spindle equator to the poles.

A) Chromosomes are located in a plane at the center of the spindle during METAPHASE (Mitosis) AND METAPHASE II (Meiosis)

b. The chromosomes move away from the spindle equator to the poles during ANAPHASE (Mitosis) and ANAPHASE II (Meiosis)

Explanation:

Note that the meiosis consists of two divisions and the 2nd meiotic division is similar to mitosis.

- Thus, at Metaphase in mitosis, and Metaphase II in meiosis, the chromosomes arranged themselves on the equator of the spindle

- While, at Anaphase in mitosis, and Anaphase II IN meiosis, the chromatids pairs at the spindle equator parts company and migrate towards the opposite poles of the cell

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

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