Jack is seeing an onion cell under a microscope. He observes formation of a cell plate. He is observing which phase of the cell cycle?

Answers

Answer 1

Answer: The formation of the cell plate (or phragmoplast) is similar to the formation of a cleavage furrow in animal cells, which separates two cells during mitosis and meiosis. Therefore, this occurs during cytokinesis

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Which of these elements has the lowest standard reduction potential?A. chlorine

B. iron

C. lithium

D. zinc

Answers

Standard reduction potential is the likelihood that a species will be reduced. It is written in the form of a reduction half reaction.
Lithium has the lowest standard reduction potential.

Answer: C. lithium

Explanation:

Standard reduction potential is the tendency for an element to gain electrons or get reduced ,measured at standard conditions i.e. when concentration is 1 M and temperature is 298 K.

It is given by: $E^0_(M^+/M)$

$E^0_([Cl^(2)/2Cl^-])=+1.36V$

$E^0_([Fe^(2+)/Fe])=-0.41V$

$E^0_([Li^(+)/Li])=-3.04V$

$E^0_([Zn^(2+)/Zn])=-0.76V$

Thus lithium has the lowest tendency to accept electrons and thus has lowest standard reduction potential.

What is the main job of DNA ?

Answers

DNA is a nucleic acid that contains the genetic instructions for the development and function of living things.

Final answer:

The main job of DNA is to store and transmit genetic information and direct protein production.

Explanation:

The main job of DNA is to store and transmit genetic information. It contains the instructions for building and maintaining an organism. DNA directs the production of proteins, which carry out many functions in the body, such as regulating cell processes, transporting molecules, and providing structure to cells and tissues.

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Which of the following is an example of a non contact force

Answers

All the options given describe a force that involves contact except for the force exerted by magnets. Thus, the correct option is C.

Magnetic force is the force exerted by magnets. It can be described as the effect exerted on a charged particle due to the magnetic field of the other particle.

It is a consequence of the electromagnetic force, which is caused due to the movement of electrically charged particles.

Two objects that are oppositely charged will have a magnetic force of attraction, whereas two objects that have the same charge will have a magnetic force of repulsion.

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Your question is incomplete. The full question probably might be:

Which of the following is an example of a non-contact force?

(a) The force exerted by us to lift a bucket

(b) push a stationary car

(d) Force due to friction

Answer:

Gravity, Electrostatic force, Magnetic force

Explanation:

A non-contact force is a force that is applied to an object by another object without contact. Gravity, electrostatic force, and magnetic force all don't need two objects to be touching in order for them to work.

On the other hand, an example of a contact force is friction, because it can only occur if two objects are touching. If you want to tell the difference between a contact and non-contact force, just ask yourself if it can occur if the two objects are not touching. If it can occur while two objects aren't touching, it is non-contact, and if it can't, it is contact.

Antoinette was diagnosed with hypertension, a noncommunicable disease in which her blood pressure is higher than normal. What is the most likely explanation for why she is hypertensive?

Answers

The answer is most likely, "She was obese and had a diet high in salt intake."

Answer:

Explanation:

Courtney is making regular observations of the growth rate of kudzu vines on a ditch in her neighborhood. She isolated and tagged five tendrils of the vine, and takes weekly cumulative measurements for a year. A portion of her results are shown below. What issue with her data does Courtney need to resolve? Tendril #

Week 1 Week 3 Week 6

1 1.2 cm 5.9 in 1.2 ft

2 2.0 cm 4.8 in 0.98 ft

3 0.8 cm 3.2 in 0.55 ft

4 0.2 cm 1.6 in 0.35 ft

5 1.5 cm 4.3 in 1.01 ft

A) Inconsistent units of measure

B) Insufficient amount of data

C) Duration of the study

D) Number of samples

Answers

Answer: A. Inconsistent units of measure

Explanation:

When taking data such as measurements, it is very important that the results are reported in the same unit of measure. Failure to do so will eventually affect your analysed result.

Answer:

A) Inconsistent units of measure

Explanation:

Since Courtney measured the same variable in all the tagged tendrils, the unit of measurement is supposed to be the same. Before any further processing or analysis of the data, she will need to use the appropriate conversion factors to convert all the variates to the same unit.

The research lasted for a whole year and data were collected weekly, the issue of insufficient data or duration of study does not arise in this case. Also since, the size of study population was not indicated, it will be be difficult to point out the sample size as an issue.

The correct option is A.

Which of the following is NOT one of the key brain structures involved in encoding and storing memories? a. hypothalamusb. hippocampusc. prefrontal cortexd. cerebellum

Answers

Answer:

Hypothalamus

Explanation:

The prefrontal cortex, hippocampus and the cerebellum are involved in memory formation.

The prefrontal cortex is involved in making decisions,forming goals and planning , it's also based on past memories.

The hippocampus is involved in forming long term memories and also in spatial navigation

The hypothalamus is the part of the brain responsible for the body's ability of homeostasis.it is also involved with endocrine control and works closely with the pitutary gland.

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