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gavmur [86]
2 years ago
14

Reflection questions need to be answered using complete sentences. Some questions may require a longer explanation in paragraph

form.
1. Based on your data, what can you infer about the length of time spent in each stage of the cell cycle?

2. What stages were the longest and shortest? Give a brief explanation of why these stages may have that time period.

3. What is a distinguishing visible feature of each stage of the cell cycle?

4. What differences can you see when you compare the nucleus of a dividing cell with that of a nondividing cell?

5 .If your observation had not been restricted to the tip of the onion root, how would the results be different?
Biology
1 answer:
natka813 [3]2 years ago
7 0
1) Interphase is the longest phase and most of the cells are present in that very stage !!


2) Interphase is the longest phase and Anaphase is the shortest phase !! Interphase is the longest phase as in this phase the cells prepare themselves for dividing and it takes most of the time for gathering energy for division ; in this phase DNA also replicate !!


3)
Interphase: DNA replicates;

Prophase: Nuclear membrane starts disappearing and Centrioles go on opposite poles !! DNA condense to form Chromosome.

Metaphase: Chromosome attach to spindle fibre and starts to move to equitorial plate.

Anaphase: Centromere divide and half the chromatid goes on either pole

Telophase: Nuclear membrane starts to reassemble; Chrmosome goes to normal uncoiled state ; Other organelles starts appearing

Cytokinesis: Cell furrow forms and cell divides into two half.


4) In dividing cell nucleus membrane is absent while in non dividing cell the membrane is intact


5) Tip of the onion root is meristamatic cell which divides but if it is permanent cell ; there would be no division !!
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The heterotroph hypothesis of the origin of life states that basic organic building blocks formed from inorganic molecules under
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Answer:

1) abiotic synthesis of small organic molecules (monomers)

2) joining of monomers into polymers

3) packaging of these molecules into protobionts, droplets with membranes that maintained a distinct internal chemistry

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Explanation:

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2 years ago
Cosmic background radiation provides direct evidence for the origin of
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Answer:

Bronchospasm

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Answer:

Hilda and her family are going on a sailing trip this summer, and Hilda is especially interested in spotting dolphins. In which zone of the ocean is Hilda most likely to spot dolphins? Hilda and her family are most likely to spot dolphins in the PELAGIC zone. To view shorebirds and crabs, Hilda should move towards the INTERTIDAL zone.

Explanation:

The Pelagic Zone

It is any water in an ocean or lake that can not be said to be positioned in proximity to the shore or in proximity to the bottom (the shore and the bottom are two distinct zones with a completely different properties.

Divisions of the Pelagic Zone

It can be grouped into subzones based on depth, we have the epipelagic, close to the top of the zone which as light been present, and the abyssopelagic, is nearer to the bottom with light being absent.

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Its found between the high tide (upper limit) and low tide lines (lower limit), majorly on the beach at the water's edge.

The major attribute of the intertidal zone is that it is immersed with water at high tide and is in exposure to the air at lower limit. The intertidal zone is usually undergoing alterations leading to organisms that are uniquely adapted to strive there.

Organisms found in this zone are sea stars, crabs, mussels, barnacles, and various corals as they well situated to strive immersed in water and a region of their lives open air at lower limit.

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