a zebra cell is just about to replicate its dna. what will happen first?

Answers

Answer 1

Answer:

The DNA unravels to make two strands.

I think this is the right answer


Related Questions

digestion begins in the mouth and continues through the gi tract. where does most digestion and absorption of nutrients take place?

Answers

Answer:

Small Intestine

Explanation:

Most digestion and absorption of nutrients take place in the small intestine.

How do foods digest in humans?

The digestion of food materials starts from the mouth, depending on the class of the food.

The digestion is aided by a variety of enzymes. From the mouth, digestion continues through the gastrointestinal tract vis a vis the esophagus, the stomach, large, and the small intestine.

However, most digestive activities happen in the small intestine as well as most absorption of nutrients into the bloodstream.

More on digestion can be found here: https://brainly.com/question/2272856

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Give an example of how water acting as a solvent is important for living organisms.

Answers

Answer:Water acts as a solvent of carbon dioxide excreted from tissues, in blood and helps in regulating pH (because it forms carbonic acid that lowers pH when it tends to get higher). Blood pH should be maintained at about 7.4. One major reason is that the structure of protein is dependent ton pH because pH determines its ionization hence also affecting the charges and interaction between side groups of amino acids. A change in pH may, therefore, denature proteins and negatively affect cellular functions.

Explanation: i took biology

Answer:

water is important for the following reasons

Explanation:

for drinking

for bathing

for entertainment purpose

for irrigation

for hypower electricity

i hope you got answer

i got it through social

how long does it take for a humming bird to flap its wings once?

Answers

Answer:

not really sure but i know it takes 10-15 times per second. also you might have to do some math i hope this helped a bit and sorry i couldn't give you an exact answer

what are the advantages of using an electron transport chain

Answers

Answer: The advantages of electron transport chains are directed

towards living things. Electron transport chains permit the cell to take energy from harvesting electrons .

Explanation: Read above.

Describe the process of cell division in a plant cell.

Answers

Answer:

Cytokinesis in a plant cell: the cell plate forms down the middle of the cell, creating a new wall that partitions it in two. Cytokinesis, the division of the cytoplasm to form two new cells, overlaps with the final stages of mitosis.

Explanation:

30 POINTS!!! If a forest burns down, which stage of the water cycle is interrupted in that ecosystem, and why?
a. Transpiration
b. Precipitation
c. Infiltration
d. Evaporation

Answers

Answer:

A.TRANSPIRATION

Explanation:

Trees have deeper roots than other plants, which implies they can access and pump up larger soil water volumes for transport to the leaves for transpiration and growth. ... The energy needed to evaporate all that water is withdrawn from the environment and leaves the system as embedded latent heat.

Which means if the forest got messed up the transpiration would be jacked up

4. Which of the following best describes the growth of the population in the graph?
a
The population is undergoing logistic growth
b. The population is undergoing exponential growth
The population has reached its carrying capacity
d. The populations is being affected by limiting factors
Population Size
U
C.
Time
RESOURCE:
ASAP

Answers

Answer:c

Explanation:

Examine the flow chart above depicting the job of a gene known as p53. It plays an important role during the G2 checkpoint of cell cycle regulation. In 4-6 sentences, explain why p53 is often called "The Guardian of the Genome". Is p53 an oncogene (a gene that stimulates the growth of cancer cells) or a tumor suppressor gene (a gene that turns off the growth of cancer cells)? Explain your reasoning.

Answers

The p53 protein is known as the guardian of the genome because this protein prevents errors during DNA replication. It is a tumor suppressor gene.

Tumor suppressor genes

Tumor suppressor genes are genes that play fundamental cellular roles and prevent cell uncontrolled growth.

A tumor suppressor gene can repair errors that occurred during DNA replication, slow down the cycle of cell division, trigger programmed cell death, etc.

The p53 acts to control cell division and cell death, thereby avoiding the emergence of cancer cells.

Learn more about tumor suppressor genes here:

https://brainly.com/question/16188646

if a plant is not green (does not contain chlorophyll) can it do photosynthesis? why or why not?

Answers

Answer:

No, it cannot carry out photosynthesis because the plant will not be able to absorb light as it does not have chlorophyll.

Explaination:

Chlorophyll in plants is used for absorbing energy from light. And, in photosynthesis, light/sunlight is one of the main factors needed, so as the plant cannot absorb light, photosynthesis can't take place.

what would happen to the carrying capacity of the ecosystem & why

Q-a volcano covers an area with 2 feet of lava

Answers

Answer:

The carrying capacity would shoot downward.

Explanation:

The area would no-longer be able to support organisms or the ground until the lava cools off. Even after then, any plants that may have been there will be gone, meaning that the ecosystem can now support less herbivores, as well as less primary producers (plants).

Less plants, means less herbivores, which means less of the animals that eat the herbivores (secondary and tertiary consumers).

What human activity contributes to air pollution?

construction
reforestation
habitat restoration
dam development

Answers

Answer:

construction

Explanation:

because more pollution is produced when the construction is in process and the pollutions are

1.noise pollution

2.air pollution etc...

The human activity that results in air pollution is construction. Please find how construction results in air pollution below.

What is air pollution?

Air pollution is the release of toxic substances called pollutants into the atmosphere.

Pollutants can be released into the atmosphere as a result of anthropogenic or human activities. These activities include:

ConstructionMiningFossil burning

Therefore, the human activity that results in air pollution is construction.

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What is the species name for humans?
A. Homo
B. Erectus
C. Carolus
D. Sapiens

Answers

Answer:

D. Sapiens

Explanation:

The scientific name is h.o.mo sapiens

h.o.mo is the genus

sapiens is the species

1. Who was Alfred Wegener?

Answers

Wegener was a German meteorologist, geophysicist and polar researcher. In 1915 he published 'The Origin of Continents and Oceans', which outlined his theory of Continental Drift.

Examples of RNA viruses are Cvid19 or the virus that causes

Answers

Answer:

I think bacteria but im not sure

Explanation:

--------

Brain is considered as the centre of all senses,why?

Answers

Answer:

The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles.

Answer:

It receives signals from the body's sensory organs and outputs information to the muscles

Explanation:

Which of the following are examples of sexual reproduction?

A yeast offspring grows out of the body of its parent in a process called budding.
A pollen grain from one flower fertilizes another flower, resulting in the development of a seed.
A bacterium copies its DNA and divides into two daughter cells in a process called binary fission.
A piece of a starfish is broken off and grows into a new starfish in a process called regeneration.
A frog releases sperm over eggs that were laid by another frog, and these cells fuse together. help :,)

Answers

Answer:

A pollen grain from one flower fertilizes another flower, resulting in the development of a seed.

A frog releases sperm over eggs that were laid by another frog, and these cells fuse together.

Explanation:

Sexual reproduction is brought about by fusion of male and female gametes. Reproduction where a part of an existing organism develops into another organism is asexual.

Pick the odd one out from each of the groups given below on the basis of respiratory organs. Give
reason for your answer.

(a) Cockroach, grasshopper, snail, ant
(b) Lizard, cow, earthworm, snake
(c) Crocodile, whale, dolphin, fish




fasst answer
if ur answering correctly i will sure mark u as a brainlist plz guisss

Answers

Answer:

a

Explanation:

because they are all arthropods

These are
inorganic materials needed in small amounts
O Proteins
0 Vitamins
Water
0 0
Fats

Answers

well water would be the only possible answer

Most plants and animals in the world reproduce by sexual reproduction. Which process is responsible for the genetic variation found in organisms that reproduce this way?

Answers

Heyyy
I guess the answer would be because of meiosis in meiosis this is because in prophase the two chromosomes cross over and the genes are mixed leading a random mix of characteristics. Mutations can also cause these differences so the offspring are different and not the exact copy as parents.

I hope this helps ❤️

Label the following with
N (neutron), P (proton),
E (electron)
___Negative charge
___ Atomic number ___determination
___ Atomic mass determination
___ Involved in bonding
___ Positive charge
___ when gained or lost creates ions
___ Neutral charge
___ Found in nucleus

Answers

Answer:

E, P, N and P, E, P, E, N, N and P

Explanation:

I am pretty sure the answers would go like this (in the order you have here):

1. Electron (they have a negative charge)

2. P (The atomic number is determined by the number of protons)

3. N and P (The atomic mass is determined by how many Neutrons and Protons there are in the atom)

4. Electron (they are usually involved in bonding)

5. Proton (they have positive charge)

6. Electron (ions are created when an atom has gained or lost electrons)

7. Neutron (they are neutral)

8. Both Neutrons and Protons (they stick together inside the nucleus)

I am not entirely sure why the atomic number determination has 2 blanks since it is only determined by protons, but I hope this helps. I havent studied this for a while but those are the best answers I can provide and have checked them with my books so I hope they are correct. Good Luck!

Dragon

the hypothalamus controls the anterior pituitary by means of

Answers

Answer:

the answer is

releasing hormones



Explain why some parts of a plant can act as both a source and a sink.

Answers

Answer:

Some organs are both a source and sink. Leaves are sinks when growing and sources when photosynthesizing. Rhizomes are sinks when growing but become sources in the spring when they provide energy for new growth.

hope this helps ☆☆☆

The leaves and rhizomes of the plant are found to act both as a source and a sink when growing and when they perform photosynthesis.

What are source and sink in plant?

Source organs are the organs which provide a net uptake of resources while sink organs are the organs which have a net drawdown of resources in the plant. Molecular mechanisms which are responsible for the regulation of the relationship between the sources and sinks. These molecular mechanisms include both the carbon and nitrogen-containing metabolites, plant hormones and genes.

Some organs in the plant are found to act both as a source and a sink. Leaves of the plant are sinks when growing and as source when photosynthesizing in the presence of sunlight during daytime. Rhizomes are the sinks when growing however they become sources in the spring season when they provide energy for the new growth.

Learn more about Plant parts here:

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a cell makes and secretes a certain protein. explain where it is made, how it is secreted from the cell and what kind of transport is used

Answers

. . . . . . .. . . . .. . . . . . . . . . . . . .. ..

Hope this helps

Which statement is an accurate comparison of aerobic and anaerobic respiration in humans?.

Answers

Answer:

glucose → lactic acid.

Explanation:

hope it helps

The statement that will best compare aerobic and anaerobic respiration is :

More ATP is generated during aerobic respiration than during anaerobic respiration.

Aerobic respiration is the type of cellular respiration which is a fixed metabolic reaction that occurs in the presence of oxygen while anaerobic respiration ia a type of cellular respiration which occurs in the absence of oxygen.  Both respirationary process yields the required energy ( ATP ) in an organism that facilitates the proper functioning of the organism.

Hence we can conclude that The statement that will best compare aerobic and anaerobic respiration is : More ATP is generated during aerobic respiration than during anaerobic respiration.

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what is the potential energy of a 10kg object sitting on a 2.5m high cliff

Answers

Answer:

245.1663 Joules

Explanation:

Use the potential energy formula which is U=mgh

Where m=mass in Kg

g=gravitational acceleration: 9.80665 m/s^2

and h=height in meters

What does mitochondria do

Answers

Answer:

Mitochondria are small structures that make energy in almost all of your cells. They do it by combining oxygen with fuel molecules (sugars and fats) that come from food. When mitochondria are faulty, cells don't have enough energy.

Explanation:

I'm mexican

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

Explanation:

How do I describe chloroplast

Answers

Answer:

a plastid that contains chlorophyll and in which photosynthesis takes place.

or

a type of plastid that is involved in the synthesis and storage of foodstuffs

Explanation:

hope this helps :)

Answer:

Chloroplasts are/have

- Oval shaped

- filled with chlorophyll

- have a 2 membrane structure

Chloroplasts are special and unique structures found in plant cells that are king when it comes to turning sunlight into energy for the plant to use. (this process is called chlorophyl)

Hope this helped!

Choose all of the items needed to complete a circuit ​

Answers

The items needed to complete a circuit include the following:

Wire BatteryLoadSwitch

Functions of the parts of a Circuit.

The wire helps in the distribution of the electric current from the power

source in order to ensure it gets to the load.

The battery contains compounds which is responsible for providing the

energy required to power up the load.

The load could be a bulb, fan etc and is the final destination of the electric

current. The electric current powers up the load and makes it functional.

The switch helps to regulate the flow of electric current and has an 'on and

off button' to prevent energy wastage when not in use.

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1. A hedgehog lives in a backyard in England. Every night, the house
owner puts out a bowl of canned cat food and hard-boiled egg. The hungry
hedgehog eats some of the food, then stops when it is no longer hungry. This
pattern helps the hedgehog to maintain a steady energy level and weight. What is
the name for keeping a stable internal environment despite changes in the
outside environment?
A. hormonal control
B. stimulus and response
C. balance
D. homeostastis

Answers

D. Homeostasis is the internal control

Answer:  D. homeostastis

brainliest goes to best answer! Explain the flow of energy as it is transformed through photosynthesis AND aerobic cellular respiration.

Be sure to explain how energy is processed and changed as it passes through and between each process.

EX: Stored energy in gas is converted to heat when you light the stove. This heat is transferred to the food as heat energy while it cooks.

Answers

The correct order of flow of energy and its conversion is

Light energyChemical energyPotential and Kinetic energy

During photosynthesis, plants converts light energy from the Sun into

chemical energy in the form of glucose. Cellular respiration involves the

conversion of chemical energy from glucose into potential and kinetic

energy by body cells

The chemical energy from glucose is converted into ATP which is another

form of chemical energy.The ATP formed helps cells perform various

activities and state of rest such as sleeping in the body through the

conversion of the chemical energy into kinetic and potential energy

respectively.

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