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3 years ago

What happens in metaphase 1 in meiosis

2 answers:

7 0

In metaphase 1, the chromosomes are arranged on the metaphase plate and are attached onto the spindle fibers. They are in the middle of the cell and are pulled by the the spindle fibers.
Hope this helps.

Korvikt [17]3 years ago

6 0

I believe the stuff in the nucleus starts to pull apart and the spindle fibers appear.

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Description of change 2011 japan tsunami

Vinvika [58]

2011 Tōhoku earthquake and tsunami<span>The 2011 earthquake off the Pacific coast of Tōhoku was a magnitude 9.0–9.1 undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST on Friday 11 March 2011, with the epicentre approximately 70 kilometres east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately 29 km. The earthquake is also often referred to in Japan as the Great East Japan earthquake and also known as the 2011 Tōhoku earthquake, and the 3.11 earthquake. It was the most powerful earthquake ever recorded to have hit Japan, and the fourth most powerful earthquake in the world since modern record-keeping began in 1900. The earthquake triggered powerful tsunami waves that reached heights of up to 40.5 meters. got from Wikipedia, need anything else let me know</span>

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2 years ago

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How does fitness differ from adaptation? *

RUDIKE [14]

Answer:

3.Fitness is related to whether an organism's adaptations result in more offspring

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2 years ago

The same, unknown bacteria is isolated from 20 sick individuals. Their samples were grown in culture and then placed in 10 healt

AleksAgata [21]

<h2>Koch's Postulates.</h2>

Explanation:

The next step should be isolate the microorganism from the mice and check if it is identical to the original microbe.

According to Koch's postulates, a microbe can be considered as a causative agent of a disease only after all the following are established:

The microorganism should be present in all the organism suffering from the disease.
The isolated microorganism should be grown in pure culture.
The organism grown in the culture should be reintroduced in the susceptible but healthy host.
Finally the microorganism must be re-isolated from the experimental host an cultured to see whether it is identical to the original specific microorganism.

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3 years ago

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4.010<br> Mutations can be caused by<br> a. radiation<br> b. chemicals<br> C. both a and b

Ugo [173]

Answer:

Mutations can be caused by radiation

if my answer helps you than mark me as brainliest.

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2 years ago

Those with generalized anxiety disorder are likely to have overactivation of _________________ with anxiety-provoking events:

Novay_Z [31]

Answer:

Explanation:

When an individual experiences excessive and continuous worry and anxiety about certain events of life(families,job security} to the extent that this happens uncontrollably in the subject, and difficult to control, such neurological disorder is called generalized anxiety disorder (GAD).

It is caused by over activation or stimulation of the region of the brain(amygdala) that mediate response to fight and flight stimulus and fear.

It is usually diagnosed when the inability to control worries extends beyond days to months with symptoms like poor concentrations, overthinking ,indecision, inability to relax, continuous taking every event as life threatening and disrupted sleep patterns.

Generally, sensory stimuli of fear or danger in the brain are transmitted by two brain circuits to two regions of the brain, to the peripheral cerebral cortex for processing voluntary decisions about the situation, and the Amygdala for processing involuntary emotional decision.

<u> Physiologically; it is the amygdala that processes how the body reacts to the effects of the stimuli in the immediate environments, the influence of the stimuli on the emotions of the subject, and the involuntary response to the stimuli by the subject.</u>

In response to the sensory stimuli of fear It stimulates the hypothalamus, which in turn activate the circulatory and breathing centre of the brain.Therefore,hormones(adrenaline) are released into the blood stream to increase blood pressure, heartbeat, breathing rate, muscle contractions and other involuntary response to anxiety. This gives a fast response compare to the cerebral cortex which takes time to relay response.

Amygdala, generally stores memories of all emotions, fear, and anxiety. In GAD patients, their Amygdala is sensitive and had been adapted to the storage of fear and anxiety to the extent that every slight normal event which does would not portend danger is over reacted to with fear or flight response which triggers the two brain circuits described above to give anxiety-provoking events.

Intake of drugs, psychotherapy are the mode of treatments.

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3 years ago