2. (a) Read through the following passage about mitosis and then completeit by writing the most appropriate word or words in the spaces.
In flowering plants the process of mitosis is restricted to the apical
and to
In growing mammals
mitosis can occur throughout the body.
However, not all regions of the young mammal grow at the same
rate and this is called
growth.
In the cell cycle, replication of DNA occurs in the..
.............phase,
after which there is a lag or gap phase, called the
phase,
before actual mitosis starts. The chromosomes also replicate before the
onset of mitosis, but this replication is not visible until the middle of the
. stage.
At this stage, each chromosome consists of two
..held
together by a

Answers

Answer 1
Answer:

Answer:

This question is incomplete  

Explanation:

This question is incomplete but there are some general facts that can be made.

Firstly, mitosis only occurs in meristematic tissue of plants which includes apical and lateral meristems

There are 4 phases in a cell cycle

1) G1 (gap 1) phase: This is the first phase of the cell cycle that has to do with an increase in the size of the cell. Major cellular components duplicate in size here.

2) S-phase: DNA replication occurs here.

3) G2 (gap 2) phase: This is the gap phase that comes after the S-phase. The cell undergoes further growth here and the organelles of the cells are also prepared for cell division.

4) Mitotic phase: There are four stages here

i) prophase: Chromosome condenses and becomes visible at this stage. And there is the emergence of spindle fibre from centrosomes.

ii) metaphase: Spindle fibre develops and sister chromatids are attached to

separate spindle.

iii) anaphase: Cohesin, which holds two sister chromatids (of chromosomes) together, breaks down and are pulled towards opposite poles.

iv) telophase: Chromosomes begins to decondense at opposite poles and actual cell division starts as mitotic spindle breaks down.

NOTE: All possible answers to the question are underlined


Related Questions

Which scientific evidence would show that, for example two species of birds are closely related?
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This molecule controls cellular activity by directing the synthesis of
Which disturbance would result in primary succession? A. harvesting wheat by using a combine harvester at the end of the growing season B. controlled burning to stimulate the growth of forest trees such as sequoia C. the formation of Surtsey, a volcanic island off of the southern coast of Iceland D. the effect of a large herd of elephants on the grasses and shrubs in an area

(a) Part A Which claim is best supported by the data? A)As annual precipitation increases, the populations of Species A and B increase.
B)As annual precipitation increases, the populations of Species A and B decrease.
C)As annual precipitation increases, the population of Species A increases while Species B decreases.
D)As annual precipitation increases, the population of Species A decreases while Species B increases.

Part B If the precipitation levels observed in year '09 remain the same and other resources remain constant, identify and describe what can be predicted to occur with the population of Species B over the next 6 years? Enter the answer in the box.

Answers

The claim is best supported by the data is as annual precipitation increases, the populations of Species A and B decrease. Thus, option B is correct.

When annual precipitation increases according to the data?

As annual precipitation increases, the populations of Species A and B decrease. As annual precipitation increases, the population of Species A increases while Species B decreases. As annual precipitation increases, the population of Species A decreases while Species B increases.

As annual precipitation increases, the populations of Species A and B increase. As annual precipitation increases, the population of Species A decreases while Species B increases.

If the precipitation levels observed in year '09 remain the same and other resources remain constant, identify and describe what can be predicted to occur with the population of Species B over the next 6 years.

Therefore, The claim is best supported by the data is as annual precipitation increases, the populations of Species A and B decrease. Thus, option B is correct.

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Answer:

D

Explanation:

It increases

Gymnosperm seeds are usually carried bya. wind
c. animals
b. water
d. all of the above

Answers

Gymnosperm seeds usually contain embryos which can be carried by water, wind and or animals. Eventually, these seeds will germinate in different environment. In this case, the answer would be d. all of the above which include the 3 answers.

Answer: It is D all of the above.

What is the purpose of mimicry?a. It helps an animal evade predators.
b. It allows an animal to fit in with a different species.
c. It helps an animal to catch prey.
d. All of the above

Answers

Answer:

d. All of the above

Explanation:

Mimicry refers to the resemblance of organisms of two different species with respect to structural, behavioral or physical features. Mimicry helps a defenseless species (mimic) to protect itself against predation due to its resemblance to the aggressive and dangerous species (a model).

For example, harmless king snake mimics venomous coral snake to avoid the predators. It represents the Batesian mimicry.

In other cases, predators may use mimicry to catch their food organisms. In Mullerian mimicry, two or more harmful species resemble each other.

An organism's capacity to mimic another organism, item, or environmental aspect is known as mimicry, hence option D is correct.

Predator avoidance: Some animals imitate the looks of other, more deadly species to frighten off predators. For instance, the viceroy butterfly imitates the poisonous to predators monarch butterfly.

Adapting to a different species: In order to blend in and avoid being noticed, some animals mimic the look of other species. For instance, the peppered moth imitates lichen-covered bark to help it fend off predators.

Catching prey: To draw in prey, several creatures replicate the appearance of food. The angler fish, for instance, employs a bioluminescent bait to entice small fish.

Thus, option D is correct.

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Which of the following is not evidence supporting the tectonic plate theory?Coal has been found under Antarctica.

Some continental coastlines fit together like puzzle pieces.

Glacier evidence has been found in continents that used to be attached to Antarctica.

Fossils of sea creatures have been found on land thousands of miles from any ocean.

Answers

Coal has been found in Antarctica is the right answer since it is completely unrelated to plate tectonics.

Which domains include species whose cells have cell walls

Answers

The answer is all domains.

There are three domains of life - Archaea, Bacteria, and Eukarya.
All organisms that belong to the domains Archaea or Bacteria have cell walls. In the domain Eukarya, there are some groups that have cell walls and others that do not. For example, plants and fungi from the domain Eukarya have cell walls.

the adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the __________. a. cornea b. fovea c. pupil d. iris

Answers

Answer:

The correct answer would be c. pupil.

Pupil refers to the adjustable opening present at the center of the iris.

It appears as a black hole present at the center of the eye through which light is passed into the eye.

The iris is muscular and contractile structure present around the pupil.

The pupil regulates or controls the amount of light entering the eye with the help of iris.

Iris through its contractile nature regulates the size of the pupil and thus, it controls the amount the light passing through the eye.

Final answer:

The adjustable opening in the center of the eye controlling light entry is the pupil, with size adjustments regulated by the iris.

Explanation:

The adjustable opening in the center of the eye that helps control the amount of light entering the eye is called the pupil. This integral part of the eye widens or narrows to allow more or less light to enter, respectively. The pupil's size is regulated by the surrounding muscle structure, the iris, which adjusts depending on the intensity of light present. Unlike the cornea and fovea, which have different roles, the pupil specifically controls light entrance.

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