A student observers melting crayons. Which of the following describes what they saw? A. A chemical change. B. A physical change. C. A physical property. D. A chemical property
Answer: A physical change
Explanation: since the melted they are still Crayons. You can freeze it and it would still be a crayon. So it was only a physical change
Oxygen-poor blood flows out of the heart and into the lungs. Nutrients and oxygen are sent to other cells and parts of the body. The blood then returns to the heart to begin the process again. Which of the body's systems is the above process describing? Answers (A) -The skeletal system (B)-The digestive system (C)-The respiratory system (D)-The circulatory system
Answer:
(D)-The circulatory system
Explanation:
lol just did it
and pls give me thanks
The circulatory system is the system which consist of blood vessels, heart, and blood. The main function of this system is the transport of oxygen and minerals to all the cells of body. Thus, the correct option is D.
What is Circulatory System?The circulatory system of body consists of all the blood vessels, blood and heart. In this system, blood travels through different blood vessels (arteries, veins, and capillaries) in all parts of the body.
The blood is the main fluid of the body that contains hemoglobin protein which is responsible for the transport of oxygen and carbon dioxide in the body. The blood exchanges gases at the surface of alveoli in the lungs and sends the blood to the heart, heart pumps the blood to all the cells of body.
Therefore, the correct option is D.
Learn more about Circulatory System here:
https://brainly.com/question/10103458
#SPJ5
How does the process of meiosis affect the genetic information that offspring receive?
Answer:
all the offspring recieve identical genetic information
Explanation:
Who is credited with creating the first accurate model of DNA? Rosalind Franklin Friedrich Miescher James Watson and Francis Crick Marshall Nirenberg and Heinrich Matthaei
Answer:
The answer is C
Explanation:
The persons credited by accurate model of DNA are James Watson and Francis Crick.
What is model of DNA?
The molecular models of DNA structures are representations of the molecular geometry and topology of deoxyribonucleic acid (DNA).
First accurate model of DNAThe first accurate model of DNA also known as 3-dimensional double helix structure of DNA, was correctly elucidated by James Watson and Francis Crick.
Thus, the persons credited by accurate model of DNA are James Watson and Francis Crick.
Learn more about models of DNA here: https://brainly.com/question/24686262
14. Why doesn't the inner core have convection?
Answer:
The inner core has subsequently been growing at the rate of around 1mm a year as iron crystals freeze and form a solid mass. The heat given off as the core cools flows from the core to the mantle to the Earth's crust through a process known as convection.
Explanation:
I hope this helps you.
The structure of a water molecule influences its properties and supports its biological significance. Which property of water is correctly paired with its significance?
A. Water is adhesive so it expands when it freezes
B. Water is cohesive so it transports materials
C. Water is polar so it helps to cool the body
D. Water is polar so it acts as a solvent
What is the function and purpose of the proteins embedded in the cell membrane?
Answer:
The function of the proteins that are embedded in the cell membranes is to transport materials in and out of the cell. Proteins are large sized biomolecules that are also referred to as macromolecules at times. They are made up of large chains of amino acid molecules.
Please mark branliest!
IN YOUR OWN WORDS explain how cell differentiation creates the different cells in a multicellular organism.
Answer:
A multicellular organism develops from a single cell (the zygote) into a ... tissue and organ development, and cell differentiation (gaining a final cell type identity). ... To function correctly, that body needs well-defined axes (such as head vs. tail). ... Mature cell types of the body, like neurons and liver cells, express different sets
Explanation:
A lake in Minnesota was thriving with black bass and bluegill. These particular fish build nests on the sandy bottom of the lake. Now, ecologists are finding that over time a layer of humus has slowly been covering the pond. The ecologists are noting that the populations of black bass and bluegill are declining, and the fish that are able to make nests in humus are rising in numbers.
The ecologists can probably conclude that this event is an example of:
commensalism
parasitism
primary succession
succession
Answer:
Explanation:
https://quizizz.com/admin/quiz/5c9100e1202f89001c843569/stages-in-aquatic-ecological-succession
The event described, where a layer of humus covers the sandy bottom of the lake and affects the fish populations, is an example of succession.
Succession is the process of ecological change over time in a particular area. It involves a series of predictable and sequential changes in the composition and structure of an ecosystem.
In this case, the gradual accumulation of humus, a layer of decomposed organic matter, is altering the habitat conditions in the lake.
The decline in the populations of black bass and bluegill, which build nests on the sandy bottom, can be attributed to the changing habitat.
The humus layer is likely making it difficult or impossible for these fish to construct their nests. On the other hand, fish that are capable of making nests in humus, possibly adapted to this type of substrate, are increasing in numbers.
Therefore, the observed changes in fish populations and the altered habitat due to the accumulation of humus indicate a shift in the ecological community over time, which is a characteristic of succession.
Know more about ecological community:
https://brainly.com/question/30639777
#SPJ2
What is the purpose of RNA Translation
Answer:
this is how proteins are bound, through a series of amino acids combined in a chain
Explanation:
1-2 Paragraphs About The Background Of Reaction Time Slowing Down Once You Get Older
Answer:
Reaction times slow with age, and they correlate with scores on tests of higher cognitive functions many of which also deteriorate with age. The age-related changes in reaction times account for a substantial proportion of the age-related variance in higher cognitive functions (e.g., Deary, 2000. 2000Reflexes do slow with age. Physical changes in nerve fibers slow the speed of conduction. ... But the effect of age on reflexes and reaction time varies greatly from person to person. You can actually slow down—even reverse—the effects of aging by staying physically active.The next time some twenty-something complains that they feel old, you can reassure them that their feelings are, in fact, not ridiculous. After studying 3,305 people ages 16 to 44, researchers found that the brain's response time begins to decline at age 24.
Explanation:
Which of the following is the ultimate source of energy in the ecological
pyramid shown in the image?"
Shrubs
Water
O Heat
O Sunlight
Answer:
Water
Explanation:
Water never runs out
Answer:d
Explanation:
in a flower sperm is made by the filament pistil ovary or anther
Answer:
It is the anther.
Explanation:
The anther is comparable to the make testis. These give rise tomale sperm cells.
Different land areas of the United States grow different crops because
Different land areas of the United States grow different crops because some crops can't be grown everywhere. For example some plants can survive the winter while others can't.
In which calluses did the new gene insert an existing corn gene?
Answer:
Many farmers use chemical herbicides to kill weeds and
insecticides to kill insects. Using genetic engineering, scientists
have developed ways to resist harmful crop pests. In this Gizmo,
you will use genetic engineering techniques to create genetically
modified corn.
Explanation:
Many farmers use chemical herbicides to kill weeds and
insecticides to kill insects. Using genetic engineering, scientists
have developed ways to resist harmful crop pests. In this Gizmo,
you will use genetic engineering techniques to create genetically
modified corn.
I GIVE BRAINLIEST !!
Please help with this question! Tell how you know, Question worth 20 points!
Answer:
D
Explanation: It is the best answer to choose and most correct.
Which process uses proteins to move molecules against a concentration gradient?
A. Passive Transport
B. Active Transport
C. Hypotonic
D. Endocytosis
The deer tick attaches to a warm-blooded animal and feeds on its blood.
Ticks need blood at every stage of their life cycle. They also carry Lyme
disease, an illness that can cause joint damage, heart complications, and
kidney problems What type of relationship is this?
Mutualism
Commensalism
Predator Prey
Parasitism
Parasitism. Ticks are complete parasites with no regard for the well being of their carriers.
why does an ecosystem have a carrying capacity?
If a population has low death rates and high life expectancy which end of the population pyramid will increase?
Answer: "Constrictive" pyramid
[ I hope my answer is correct]
List some examples of how populations affect each other.
What is one way plants and animals are similar?
Summarize the 3 types of cell division: Binary fission, mitosis, and meiosis
Answer:
Binary Fission is the reproduction of prokaryotic cells (bacteria and bacteria-like Archaea) is accomplished through binary fission. Binary fission is essentially cloning. Barring mutations that may have occurred when the genetic material was copied (a process called replication), the two resulting daughter cells are identical to the parent cell.
Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information.
Help ASAP give brainliest to first answer
Answer:
Won't fowl the lock and key, and maybe less binding of the substrate.
Explanation:
Answer:
Im pretty sure its the second one. Im sorry if its wrong!
Explanation:
If a mother has an AB blood type and her daughter has BB blood type, The dad has
AA blood, the mailman has type AO blood and the neighbor has BO blood. Which one is really the father?
A.the dad
B.the mailman
C.the neighbor
D.none of them
Answer:
c. neighbor
Explanation:
half the mother, half by fathee
help I have 10 minutes this is a huge gradeeeeeee
Answer:
1. Volume
2. Mass
3. Units? Metric System? I'm not sure about this one
4. Liters
5. Kilograms
6. Meters, but I'm pretty sure its the whole metric system
Explanation:
I have to go back and look at questions 3 and 6.
Hope I helped :)
There are ________________________ amendments to the Constitution.
Answer:
27 amendments as of 2020
Explanation:
Hope i helped!
An elephant is a multicellular organism that weighs about 200 pounds at birth and can grow to weigh as much as 15,000 pounds. What increases as the elephant grows into an adult?
The collection of water in each cell
⊝
The amount of energy in its cells
⊝
The size of each body cell
⊝
The number of cells i
Answer:
D?
Explanation:
Im assuming the last one is "The number of cells in its body". If so, that is the right one.
i need help please i need help
Answer:
what do u need help with?
Explanation:
:P
Which of the following can occur because of the exchange of homologous chromosome parts during the process of meiosis?
Answer:
Muttation can occur during the exchange of genetic meterial from homologous chromosomes which may led to cause deseases in some cases.
Explanation:
Homologous chromosomes exchange genetic material during the process of meiosis.
What is Meiosis?Meiosis is a type of cell division in which germ cells present in the sexually-reproducing organisms produces the gametes, such as sperm or egg cells. It involves two rounds of division which results in four cells with only one copy of each chromosome.
These four cells are haploid in nature. Meiosis produces the sex cells or gametes like eggs in females and sperm in males.
Meiosis is divided into nine stages. These are divided between the first time the cell divides (meiosis I) and the second time it divides (meiosis II).
Thus, homologous chromosomes exchange genetic material during the process of meiosis.
Learn more about Meiosis, here:
https://brainly.com/question/29383386
#SPJ6