Cells of a normally rod-shaped bacterium (e.g., Bacillus subtilis) that have completely lost the ability to produce the MreB protein would mostly likely be

Answers

Answer 1

Answer:

Answer:

The bacterium will be a spherical shape

Explanation:

The responsible for the width of rod-shaped bacteria is the protein called MreB. This protein forms large microfilaments that are very similar to actin filaments found in eukaryotic cells. All the bacteria that are spherical by nature doesn’t have the protein MreB. So, if a rod-shape bacterium that doesn´t have a MreB protein or is altered this bacterium would be spherical-shape.

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After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres? 1. anaphase
2. prophase
3. metaphase
4. telophase

Answers

4.Metaphase
All of the chromosomes are aligned midway between thespindle poles. A spindle is a dynamic network of microtubules thatattaches to and moves chromosomes during nuclear division. Microtubulesattach each chromatid to one of the spindle poles, and its sister to theopposite pole.

Chromosomes attach to spindle fibres by their centromeres during metaphase of mitosis.

Further Explanation:

Interphase is the resting phase or metabolic phase of a cell where it prepares itself for the cell division process. Interphase comprises of sub-phases namely, Gap1 phase, Synthesis phase and Gap2 phase. G1 is the first gap phase where a cell grows larger in size and the cytoplasm volume increases as more organelles are produced. During Synthesis phase, the strands of DNA replicates. G2 is another gap phase in which the cell becomes much larger in size and this phase is followed by mitosis where cell division occurs.

Mitosis or somatic cell division is comprised of four phases which includes prophase, metaphase, anaphase and telophase. A somatic cell divides to give rise to two identical daughter cells where each cell contains exact copy of each chromosomes present in the parent cell. In the prophase, the envelope that covers the nucleus and nucleolus disappears and chromosomes become visible by forming two chromatids attached to centromere.

In the metaphase, chromosomes alignment at the metaphase plate occurs and spindle fibres attach to the centromere. Spindle fibres pull the chromatids away from the metaphase plate towards the opposite poles of the cell during anaphase. In the telophase, nuclear membrane reforms, chromosomes decondense and nuclear membrane reforms around each daughter nuclei. The cytokinesis is the final stage of cell division process where the parent cell is pinched off to result in two daughter cells.

Learn more:

1. Learn more about carbohydrate brainly.com/question/6947177

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Answer Details:

Grade: High school

Subject: Biology

Chapter: Cell division

Keywords: Mitosis, prophase, metaphase, anaphase, telophase, interphase, cytokinesis, somatic cell, nucleolus, nucleus, centromere, chromatids, spindle fibres.

Advantages of being an extremophile

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Extremophiles are organisms that can live and thrive in extreme environments, such places can have high pressure and temperature, just like the organisms in hydrothermal vents. The benefits of being an extremophile is less risk for predation since not much predators can live in extreme environment; there will also be less competition in term of food source.

Compare and contrast the various adaptations of aquatic and desert plants?

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Desert plants will have very long roots to reach water. Aquatic plants may be able to float to collect water or have sturdy roots to hold them in place.

Answer:

Explanation:

Some deserts plants such as cacti are adapted to store water and some grow long roots to absorb water from deep below the surface. Deserts plantsgenerally do not have leaves. 1. water plants have water but desert plants have less water.

A MA has opened and used part of a new multidose vial. The MA should ______ the vial.

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I think the MA should write the current date on the vial. It is important for the Ma to write the current date so as to keep track, and in case the MA requires to use it for reference when he/she wants to use it again. It is therefore important for an MA or nurses to label the vial by writing the date of use.

Based on the endosymbiotic theory, what cell would result from the endosymbiosis of a cell with a cyanobacterium

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The answer is B. The prokaryotic cell can make its own food.

B. Because, Bacteria is a prokaryote on its own.

Why are aye ayes called that way? Plz help!

Answers

One is that the name was coined by French naturalist Pierre Sonnerat who said it was a ‘cry of exclamation and astonishment’, which the locals gave upon seeing the creature. The second is that ‘aye-aye’ is derived from the Malagasy phrase heh heh which means ‘I don’t know’. When the locals were asked what the creature was, they would answer‘heh heh’, either because they really didn’t know what it was or they were afraid to speak its name.

Answer:

Many people native to Madagascar consider the aye-aye an omen of ill luck. For this reason they often have been killed on sight. Such hunting, coupled with habitat destruction, have put aye-aye populations at-risk. Today they are protected by law.

Explanation:

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