2. Mature nerve cells no longer divide, so they do not replicate their DNA. A cell biologist found that
there was X amount of DNA in a human nerve cell. She then measured the amount of DNA in four
other types of human cells. The results are recorded in the table below. Complete the chart by
filling in the type of cell from these choices: a sperm cell, a bone marrow cell just beginning
interphase of the cell cycle, a skin cell in the S phase of the cell cycle, or an intestinal cell beginning
mitosis and why.
Cell A 2.0x
Cell B 1.6x
Cell C 0.5X
Cell D X
Answer:
Explanation:
Some cells in the adult animals do not appear to exhibit division (e.g., heart cells, and many other cells divide only occasionally e.g., when there is need to replace cells that have been lost due to injury or cell death. These cells that do not divide further and exit G 1 -phase to enter an inactive stage called quiescent stage (G 0
. What is the name of the substance that is collected by this system ?
1)Recycled immunity
2)Lymph
3)Trash
4)Blood
Answer: 2) lymph
Explanation:
why is medical care important in animal husbandry ?
Answer:
reducing the number of antimicrobials that is in use.
4. A white flowered plant is crossed with a plant that is heterozygous
for the trait.
Probabilities
Punnett Square
Genotypes
(%)
Phenotypes
Parents
-
96 PF
96 PE
% Purple
& white
Answer:
parents yes
Explanation:
did it on edge
10. What does the practice of clear cutting involve?
O picking out high value trees to be logged
O causing less forest damage than selective cutting
O cutting down all the trees in an area
O removing all the vegetation in an area
Answer:
Cutting down all the trees in an area.
Explanation:
kind of in the name
only red tulips result from the cross between pure red and pure white tulips. Which statement is true?
Answer: I wouls say 4, but dont get mad at me if its wrong
Explanation: none of the other ones make sense execpt for 4 and 3
A ____ cell has half the chromosomes of a ____
cell. (related to meiosis)
Answer:
A daughter cell has half the chromosomes of a parent cell
I don’t understand this I need help
Answer:
3,2,1,4
Explanation:
as time goes on the water levels rise it expands the bay of the river
Select the correct answer.
Which statement correctly distinguishes between alternative energy and renewable energy?
O A. All alternative energies sources produce green energy, but not all renewable energy sources.
ОВ.
All renewable energy sources produce green energy, but not all alternative energy sources.
OC. All renewable energy sources have an infinite supply, but not all alternative energy sources.
OD.
All alternative energy sources have an infinite supply, but not all renewable energy sources.
Answer: A
Explanation:Renewable energy generation comes from sources that can be replenished naturally over time. Alternative energy generation does not produce greenhouse gases or harm the environment. These differences are important when discussing ways to fight global climate change.
PLEASE HELP!!!
True or False? The "light" side of the moon is always facing Earth and the "dark" side
of the moon is always facing away.
Answer:
yes, the dark side of the moon always will facing away.
Brainstorm various types of taxis that can be observed in animals. Describe two that have not been previously mentioned and indicate if they are positive or negative.
Taxes are the animals' movements orientated to stimuli or away from them. Phototaxis, chemotaxis, hydrotaxis, geotaxis, thigmotaxis, phonotaxis, etcetera.
What are taxes?
Taxes are the movements or changes in orientation done by organisms in response to a stimulus. It is about getting closer or farther from the stimuli. According to this, we can differentiate the followings,
Positive taxes ⇒ when the organisms react and move toward the stimuliNegative taxes ⇒ when the organisms react and move away from the stimuli
The stimulus is received by receptors in the organism's body. The type of response will depend on the type of stimulus.
Different types of taxes depend on the type of stimuli and the organism that receives them. Taxes might vary among plants and animals.
Taxe observed in animals are,
Anemotaxis ⇒ displacement according to the wind's direction. Some insects show these taxis. Phototaxis ⇒ organisms respond to light in different ways. For instance, some worms and cockroaches move away from light, while moths and flies are attracted to light. Phonotaxis ⇒ Orientation according to sounds. Geotaxis ⇒ motion according to gravitational movements. For instance, jellyfishes move to the bottom of the sea (positive geotaxis) or the surface (negative geotaxis). Hydrotaxis ⇒ Movement to or away from water. When marine turtles are born, they move toward the ocean.Reotaxis ⇒ Moving with or against the water current. Thermotaxis ⇒ Movements of the organism according to the source of the hit. Mosquitos for example express positive thermotaxis. Cockroach moves toward warm sources. Thigmotaxis ⇒ Responses to vibrations or pressures. For instance, spiders show positive thigmotaxis when they identify the vibrations of a trapped insect in their webs.Chemotaxis ⇒ Response of animals to chemical signals. For instance, ants show positive chemotaxis while looking for food. Sharks express positive chemotaxis when they smell blood. Moths show positive chemotaxis when they receive pheromones.Galvanotaxis ⇒ Motion according to electrical stimuli.Astrotaxis ⇒ Movements following the stars, the sun, or the moon.
Having made these descriptions, you can mention all of them and describe the followings,
→ Phototaxis, explaining that
moths are attracted to light expressing positive phototaxis. cockroaches hide from lighted places, expressing negative phototaxis.→ Geotaxis, explaining that
jellyfishes express positive geotaxis when moving to the bottom.squids express negative geotaxis when moving to the surface.You can learn more about types of taxis at
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if a high tide comes in at 8:00 am what time will it come in on the following day?
Which statement is true about a scientific theory?
a Theories are based entirely on logic, and creativity plays no role in their development.
b Theories are set in stone and cannot be changed.
c Theories cannot be discarded because they are based on sound science.
d Theories can be revised as new knowledge expands our understanding.
Answer:
D theories can be revised when new knowledge expands our understanding
Explanation:
Which of these arrangements explains the correct order of processing fibres into wool?
Rolling, Shearing, Dyeing, Scouring, Sorting, Cleaning of burrs
Scouring, Shearing, Cleaning of burrs, Rolling, Dyeing. Sorting
Shearing, Scouring ,Sorting, Cleaning of burrs, Dyeing, Rolling
Cleaning of burrs, Rolling, Dyeing, Shearing, Scouring, Sorting
Answer:
Shearing, Scouring ,Sorting, Cleaning of burrs, Dyeing, Rolling
example of chromosomes
Explanation:
Human has 46 chromosomes .............
They help identify harmful pathogens within the body so they can be destroyed
1)Lymph nodes
2)Lymph vessels
3)Lymph immune vessels
4)Lymph
PLEASE HELP IM ON A TIMER!!!!!!!!!!!!!!!!!!!!!!!!!
Science, middle school
Julia made the following table to compare prokaryotic and eukaryotic cells. Structure Prokaryotic cell Eukaryotic cells Cell wall is present Yes Sometimes Flagellum for movement Yes No X is present Yes Yes Which of the following would best replace X? Cell membrane Mitochondria Nucleus Vacuole
Mitochondria ,Prokaryotes lack mitochondria and instead have their ATP on their cell surface membrane. The eukaryotic cells are typically larger than prokaryotes and more various in their shape and structure.
Is mitochondria absent in prokaryotic cells?Prokaryotic cells are less structured than eukaryotic cells. They have no nucleus whereas their genetic content is free-floating within the cell. They also lack the numerous membrane-bound organelles found in eukaryotic cells. Thus, prokaryotes have no mitochondria.
Thus, option "B" is correct, Prokaryotes lack mitochondria and instead have their ATP on their cell surface membrane.
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Identify 6 parts found in the human brain
Answer:
Frontal Lobe, Temporal Lobe, Parietal Lobe, Occipital Lobe, the Cerebellum, and the Brain Stem.
Explanation:
hope that helps :/
Answer:
The brain is divided into main functional sections, called lobes. These sections or brain lobes are called the Frontal Lobe, Temporal Lobe, Parietal Lobe, Occipital Lobe, the Cerebellum, and the Brain Stem. Each has a specific function as described below.
Which of the following subatomic particles contribute almost no weight to an atom
How is seawater intrusion a negative impact on the ecosystem?
A. It can cause land subsidence
B. Depletes the surface of freshwater
C. Compromises groundwater
D. Plants need seawater to survive
Answer:
A. It can cause land subsidence
Explanation:
Answer: A
Explanation: Pls give brainliest
What is the scientific name of the only fresh water turtle found on the Southern most Bahamain island?
Answer:
Jamaican slider is the scientific name of the only fresh water turtle found on the Southern most Bahamain iisland.
can somone help me orginize this
Answer:
b
Explanation:n
The hypothesis that evolution occured slowly but steadily is called?
Answer:
gradualism
Explanation:
Reach Up
Giraffes today all have long necks, but they were not always like that. How have giraffes
changed over time?
Giraffe Necks
Formulate a position stating that giraffes used to have shorter necks, citing existing evidence that suggests
this.
Answer:
giraffe's long neck evolved from its continual striving to reach food
Explanation:
What environmental change happens when the number of prey in a certain area decreases? The answer is Climate Change!!!!
Climate change
Increased predators
Pollution
Reduced space
Answer:
when the number of prey decrese, the number of their predators should also decrease. none of the answer choices make sense in this scenario.
Explanation:
5. The air we breathe is mainly a mixture of nitrogen gas, oxygen gas, and carbon dioxide. What would
the total pressure when the partial pressure of oxygen gas is 0.21 atm, the partial pressure of carbon
dioxide gas is 0.01 atm, and the partial pressure of nitrogen gas is 0.78 atm.
Answer: 160 mm HgTherefore, the partial pressure of oxygen is: PO2 = (760 mm Hg) (0.21) = 160 mm Hg, while for carbon dioxide: PCO2 = (760 mm Hg) (0.0004) = 0.3 mm Hg.
Explanation:
Many dietary supplements contain digestive enzymes the manufacturers claim are necessary to digest food properly. What will happen to these enzymes in the stomach? (Hint: Enzymes are proteins.) Will the enzymes continue to function once they have reached the small intestine? Why or why not?
The enzymes which are found in food supplements will be denatured in the stomach and lose their activity.
What are digestive enzymes?Digestive enzymes are enzymes which aid in the process of digestion in the body.
The body produces the digestive enzymes required for the digestion of food.
Due to the acidic nature of the stomach, digestive enzymes in the stomach are synthesized as proenzymes to prevent denaturation.
Therefore, the enzymes which are found in food supplements will be denatured in the stomach and lose their activity.
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In 3-5 sentences, explain the difference in good and bad atmospheric ozone and how each is distributed in Earth's atmosphere.
(Giving 39 points and don't mind if this is in the wrong subject because this is Earth Science. And will give Brainliest!)
Answer:
Stratospheric ozone is considered “good” ozone because of this beneficial role. In contrast, ozone formed at Earth's surface in excess of natural amounts is considered “bad” ozone because it is harmful to humans, plants, and animals.Most ozone resides in the stratospheric ozone layer and a small percentage (about 10%) is distributed throughout the troposphere.
Between 15 and 30 kilometers above the surface of the earth, the ozone layer protects ourselves and other living things from the sun's harmful UV radiation.
What is ozone layer?The ecosystem and human health could be seriously impacted by the ozone layer's thinning. Over the entire globe, stratospheric ozone is being depleted.
However, the Arctic region of the northern hemisphere (where this phenomenon is more mild) than the southern hemisphere (Antarctica).
The so-called ozone hole is generally thought to be a concentration level of 220 Dobson Units or less, which is regarded to show serious ozone depletion. Only in the southern hemisphere is this noticeable. The ozone hole's historical maximum size is seen here at 28.4 miles.
Therefore, Between 15 and 30 kilometers above the surface of the earth, the ozone layer protects ourselves and other living things from the sun's harmful UV radiation.
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If you consume excess calories and do not exercise, those calories are stored as _____ in your body.
Answer:
Fat is going to be your answer
Explanation:
If you don't exercise once in while your body is going to have fat in your stomach and may get bigger in size.
how are mitosis and meiosis similiar
Answer:
Mitosis and meiosis are the processes in which a cell divides into more cells. You have the prophase, when chromosomes become visible paired chromatids. Then, the metaphase, the telophase, and then, the anaphase in which cells move to opposite poles to split into cells. Then, the process repeats.