Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
Answer:
DNA replication needs to occur because existing cells divide to produce new cells. Each cell needs a full instruction manual to operate properly. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
Explanation:
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
The replication process relies on the fact that each strand of DNA can serve as a template for duplication. DNA replication initiates at specific points, called origins, where the DNA double helix is unwound. A short segment of RNA, called a primer, is then synthesized and acts as a starting point for new DNA synthesis. An enzyme called DNA polymerase next begins replicating the DNA by matching bases to the original strand. Once synthesis is complete, the RNA primers are replaced with DNA, and any gaps between newly synthesized DNA segments are sealed together with enzymes.
DNA replication is a crucial process; therefore, to ensure that mistakes, or mutations, are not introduced, the cell proofreads the newly synthesized DNA. Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
state two changes which take place in the flower after pollination
After pollination and fertilization following changes occur in a flower: (i) The petals, stamens, style and stigma of the flower fall off. (ii) Sepals dry up and hold the ovary. (iii) The ovules confined in the ovary develop into seeds.
The __________ system consists of the brain, spinal cord and nerves.
A. nervous
B. circulatory
C. digestive
Answer:
A. Nervous
Explanation:
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How does flooding affect the soil layer of the
ecosystem?
Answer:
Changes from flooded to drained conditions in soils stimulate changes from aquatic to terrestrial vegetation and decrease the algal contribution to total primary production. Drainage of organic soils then has the effect of removing a source of net primary production (algae) and carbon sequestration
Explanation:
Use different words then I did
Answer:
Soil will become damp and will thrive in water
What process creates stalagmites? Group of answer choices Rivers carrying rocks down a mountain Windblown sand shaping large rocks Minerals being deposited as water drips Glaciers pushing large rocks
Answer:
Minerals being deposited as water drips.
Explanation:
Stalagmites grow on the floor of a cave. The process that creates them starts with the filtration of rainwater drops through the rock picking gases and minerals, amongst these ones is calcite. When the drops containing these elements pass through the rock and are in contact with the air, a chemical reaction happens. As a consequence, the calcite precipitate on the floor of the cave. This process has to happen many times to form a stalagmite.
What are the 3 types of plate boundaries? Describe each.
Explanation:
Divergent boundaries -- where new crust is generated as the plates pull away from each other.
Convergent boundaries -- where crust is destroyed as one plate dives under another.
Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
How is your body temperature held constant?
The elasticity of those capillaries plays a central role in our ability to maintain constant body temperatures. When there's too much heat in the body, our capillaries automatically expand and increase the blood flow to the skin, allowing the excess heat to transfer to the air.
can we prepare slides without stain? justify.
Answer:
Yes, it is easier to prepare slides without using any stains however, will not be able to see the colorless bodies present in the cell so that the stains help us to easily see. Preparing the slides is quite easier without staining and they are not visible to clearly the eyes
Explanation:Yes, it is easier to prepare slides without using any stains however, will not be able to see the colorless bodies present in the cell so that the stains help us to easily see. Preparing the slides is quite easier without staining and they are not visible to clearly the eyes
Which statements describe social behavior? Check all that apply.
what is the temperature at which enzymes work best and worst?
Answer:
There is a certain temperature at which an enzyme's catalytic activity is at its greatest which is 37.5 oC
Enzymes are still proteins, and as with all proteins, temperatures above 104 degrees Fahrenheit, 40 degrees Celsius, will start to break them down.
Explanation:
The temperature for most enzymes is about 98.6 degrees Fahrenheit (37 degrees Celsius).There are also enzymes that work well at lower and higher temperatures.
Hope this helped!!
Which of the following are located in the dermis of the skin?
A. melanocytes
B. sebaceous glands
C. keratin
D. melanin
Answer:
B
Explanation:
Multiple Choice
Which of the following is a good source of DNA, useful in determining identity in a forensic case
medical records
O teeth and dental records
O laundered clothing
O x-rays of the corpse
Suppose a human child had a mother with dyed-pink hair and a father who was missing a finger (lost in an accident). Would the child inherit these traits? Explain.
Answer:
No
Explanation:
These traits are not genetic, thus the parents do not carry the sex-specific Alleles to pass off to offspring.
Help please!!!!!
What is true of dermal tissue?
a. It forms the outer layer of the plant
b. It includes structures such as the root hairs
c. Its primary function is protection
d. All of the above
Answer: D. All of the above
Dermal tissues also called epidermis, make up the outer layer of all plant organs (Roots, leaves e.t.c). They have three main tissue types which are ground tissue, vascular, and dermal, all plant organs contain these three tissues.
Two atoms have the same number of protons but different numbers of neutrons. These atoms are:
A. electrons
B. isotopes
C. molecules
D. radiation
tysm!
Answer:
Isotopes
Explanation:
If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes. Two terms we use to identify nuclides (isotopes) are atomic number and mass number.
PLEASE HELP!! DUE SOON!!!
The Sun is classified as which type of star?
A. black hole
B. main sequence
C. neutron
D. supergiant
Answer:
Our Sun is categorized as a G-type yellow-dwarf main sequence star.
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Which of the following correctly matches a property of an organic molecule with how that property helps the organic molecule function in living organisms?
A. Carbohydrates lower the activation energy of certain reactions. This allows metabolic processes to take place at a rate that can sustain life.
B. Proteins contain nucleotides that encode genetic material. This allows proteins to accurately pass genetic information from one cell to another.
C. Nucleic acids contain multiple carbon-hydrogen bonds. This allows nucleic acids to provide energy for living organisms by breaking these bonds.
D. Lipids are insoluble in water. This allows lipids that make up biological membranes to regulate the entry and exit of many substances.
No dam links
Answer:
C. Lipids are insoluble in water. This allows lipids that make up biological membranes to regulate the entry and exit of many substances.
Explanation:
Identify the structure of the human heart described as the main vessel in the arterial network that conveys oxygen-rich blood from the heart to all parts of the body except the lungs. Question 34 options:
aorta
atrium
coronary artery
pulmonary artery
Answer:
the answer is A:aorta
Explanation:
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What is the proper way to introduce a motion using correct parliamentary procedure ?
Answer:
um i think , that it's i move
Answer:
Step 1: A member of a board who wants to make a motion must first be recognized by the chair of the meeting. ...
Step 2: A member seconds the motion. ...
Step 3: The chair states the motion: “It is moved and seconded to ... ” At this point the motion now belongs to the group (not the maker or the “seconder”).
Explanation:
Step 1: A member of a board who wants to make a motion must first be recognized by the chair of the meeting. ...
Step 2: A member seconds the motion. ...
Step 3: The chair states the motion: “It is moved and seconded to ... ” At this point the motion now belongs to the group (not the maker or the “seconder”).
Which of the statements is correct regarding water potential in plants
1. Water moves from a low water potential to a high water potential
2. Water moves from a. high water potential to a low water potential
3. Water potential in the leaves of trees is higher than the water potential in the roots of trees
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Answer:
I believe it is b
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If a dog starts to put its paw down on a sharp stone, the tough skin skin protects underlying structures from damage. Additionally, touch receptors in the skin send sensory signals to the spinal cord. The spinal cord then sends a signal to the muscles to lift the paw rather than continuing to press down. In this scenario, the dog may experience discomfort but avoid injury.
What two body systems are being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw?
A.
integumentary and nervous systems
B.
circulatory and nervous systems
C.
circulatory and lymphatic systems
D.
integumentary and lymphatic systems
PLZZ HELP QUICKKK
The two body systems being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw are the integumentary and nervous systems, which are in option A.
What is the organ system?The dog's response to the sharp stone involves the coordinated action of two body systems: the integumentary system and the nervous system. The integumentary system consists of the skin and its associated structures, including hair, nails, and glands. The skin acts as a protective barrier between the external environment and the underlying tissues, and it has specialized structures, such as tough, keratinized layers in the paw pads, that can withstand pressure and protect the sensitive tissues underneath.
Hence, the two body systems being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw are the integumentary and nervous systems, which are in option A.
Learn more about the organ system here.
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Can anyone help me with these please
Answer:
6. Current = 8.33 Amps
7. Energy = 1200 Joules
Explanation:
Given the following data;
6. Power = 1000 Watts
Voltage = 120 Volts
To find the current flowing through;
Power = current * voltage
1000 = current * 120
Current = 1000/120
Current = 8.33 Amps
7. Power = 900 Watts
Time = 45 minutes to hours = 45/60 = 0.75 hours
To find the energy consumption;
Energy = power/time
Energy = 900/0.75
Energy = 1200 Joules
(PLESE HELP) If you exert a force of 500 N to walk 4 m up a flight of stairs in 5 s, how much power do you
use? (INCLUDE THE UNIT for power!)
Answer:
LETSS GOOOOOOOOOO
Explanation:
Answer:
Solution given:
Force [F]=500N
distance [d]=4m
time [t]=5s
Now
power =F× velocity
=F×d/t=500×4/5=400 watt
explain how thyroxine production is an example of homeostasis
Explanation:
The production and release of thyroid hormones, thyroxine and triiodothyronine, is controlled by a feedback loop system that involves the hypothalamus in the brain and the pituitary and thyroid glands. ... This system allows the body to maintain a constant level of thyroid hormones in the body.
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Humans vary in their ability to taste the bitter chemical compound phenylthiocarbamide ( PTC ). The taster phenotype is dominant to the non-taster phenotype. Researchers tested the PTC taster phenotype of individuals from an isolated population. In the sample, 780 individuals were able to taste PTC and 70 individuals were not able to taste PTC .Assuming the population is in Hardy-Weinberg equilibrium, what is the frequency of the non-taster allele
Answer:
The frequency of the recessive allele, t is f(t) = q = 0.29.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
A group of puppies have different fur colors. This is an example of
organism diversity
ecosystem diversity
genetic diversity
species diversity
genetic diversity
Explanation:
A virus has wiped out the grasshopper population in the area. What effects to the ecosystem will most likely occur?
Answer:
Those who prey on grasshoppers will have their population decline while the grass population will rise.
Explanation:
Organisms need food to survive. If their food is gone, they won’t thrive as well. This isn’t saying they’ll go extinct, as they may have other food sources, but life will be harder with one food source gone. Since grasshoppers eat grass, the grass population will rise some due to a lack of predation. Hope it helps :)
During cell division the ONLY cell organelle that breaks down and reforms is the
Answer:
kinetochore
Explanation:
The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle.
The skeletal and muscular systems are similar because
The skeletal and muscular systems are different because-
Answer:
The bones of skeletal system serve to protect the body's organs and support the weight of the of the body ,giving the body it's shape
Explanation:
The muscles of the muscular system attach to these bones, pulling on them to allow for movement of the body
Different genotypes always produce different phenotypes. Explain, using an example, why this is NOT true.
Answer:
This is not true because different genotypes can express the same phenotype, depending on the genes present.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.