Mrs. Johnston heated 5 grams of sugar. The sugar first looked shiny, and then it melted and became dark brown. Finally, all that was left was a black, shiny residue. She then heated 5 grams of sand in the same way. The sand’s appearance did not change.
What explains these results? a Sand is an element, but sugar is a compound.
b Heating the sugar caused a chemical change.
c Heating the sand caused a chemical change.
dHeat only caused physical changes in both the sand and sugar.
Answer:
B
Explanation:
Heating the sugar causes it to burn, thereby inciting a chemical change in the glucose molecules.
replicate the following strand of DNA:
ATGAACCATTCAGTATGG
Answer:
I only know A can only pair with T and G only pair with C I hope this helps
Explanation:
If it helped please give me brainliest
2Which describes a function that is completed by both the
male and female reproductive systems?
a. Nourishing and protecting a developing
embryo.
b. Producing gametes (sperm and egg cells) that
unite inside the female reproductive system.
c. Removing nitrogenous wastes and excess water
from the blood.
d. Producing gametes (sperm and egg cells) that
unite inside the male reproductive system.
Answer:
b. Producing gametes (sperm and egg cells) that unite inside the female reproductive system.
Explanation:
The "gametes" refer to the sex cells in humans. The female sex cells are called "egg cells" and these are being produced by the ovary. The male sex cells are called "sperm cells" and these are being produced by the testicles. After copulation, there's a probability for the egg cells and sperm cells to unite. They unite inside the female's reproductive system, specifically inside the "fallopian tube."
What would happen if the axis of the earth were NOT
tilted with reference to the plane of its revolution as
shown in the second figure below?
A
There would be no
difference at all.
b,The sun would rise in the
west and set in the east.
C
In any place, the weather
will be more uniform
throughout the year.
d,At any time, the weather
will be almost the same
throughout
Answer:
c prolly if not that then d
Explanation:
thats my best bet. all the answer choices are kinda sucky, no offense
If at any given time the Earth's axis was not tilted with respect to the plane of its rotation, the weather would be approximately the same throughout the world. So, the correct option is (D).
What is Rotation of Earth?Earth's rotation or Earth's rotation is defined as the rotation of the planet Earth around its own axis as well as the change in the orientation of the rotation axis in space, where the Earth rotates eastward, in prograde motion. . As seen from Polaris, the North Pole Star, the Earth turns counterclockwise.
This is the movement of something through one complete circle which the daily rotation of the Earth upon its axis. The Earth's axis runs from the North Pole to the South Pole which takes the Earth 24 hours, or one day, to make one complete rotation around this invisible line.
If the earth's axis was not inclined to the plane of its orbit, there would be no seasons and humanity would have to suffer.
Thus, if at any given time the Earth's axis was not tilted with respect to the plane of its rotation, the weather would be approximately the same throughout the world. So, the correct option is (D).
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Please help I'll give brainless plz
Answer:
Respiration
Explanation:
Respiration
they produce ethanol and co2
Carbon (C)
Atomic #: 6
Atomic Mass: 12
Question: Calculate the number of electrons using the information given. Write the number on the line and then draw the electrons into the Bohr model.
Assuming the atom has a neutral charge, the number of electrons will be the same as the number of protons. The number of protons is given by the atomic number, 6, so there are six electrons.
The first "ring" of the atom (closest to the center) can take two electrons, so draw two electrons there. The second (outer) "ring" of the atom can take the remaining electrons, so draw four electrons there.
Atomic mass is irrelevant in this specific problem.
HURRYY!!
Why have American's portion sizes become larger in the last decade?
Answer:
American's portion sizes have become larger in the last decade due to the expanding of food industries and marketing campaigns that tell us to eat more.
Explanation:
The growth of food industries in the last decades to obtain more money in combination with the media influence has led us to eat more, thus why the size of our portions has increased their size.
Another theory states that people always want to eat more, and the industry has only fulfilled this demand, but it is not clear why, in the past, this did not happen.
How do our bodies use calcium?
Answer:
the body needs calcium to maintain strong bones and to carry out many important functions. Almost all calcium is stored in bones and teeth, where it supports their structure and hardness. The body also needs calcium for muscles to move and for nerves to carry messages between the brain and every body part.
Explanation:
Answer:
the body needs calcium to maintain strong bones into carry out many important functions almost all calcium is stored in bones and teeth where it supports their structure and hardness the body also needs calcium for muscles to move and for nerves to carry messages between the brain and every body part
A native forest is complex and biodiverse. Once disturbed, it is impossible to
replace all of the species of the original forest and to recreate their
relationships. Which of the following endeavors is limited by this fact?
Answer: Reclaiming and replanting forests in deforested answers
Explanation: just took quiz
Answer:
Reclaiming and replanting forests in deforested areas
Explanation:
just did the quiz
how to tell what family members are effected by the huntington disease
Answer:difficulty concentrating
memory lapses
depression – including low mood, a lack of interest in things, and feelings of hopelessness
stumbling and clumsiness
mood swings, such as irritability or aggressive behaviour
Explanation:
I don’t knowAnswer:
Explanation: because
chloroplast (has chlorophyll inside) is where sunlight breaks apart water and carbon dioxide to form sugar and oxygen true or false
Answer:
i'm pretty sure this is true the sugar it makes is called glucose
Explanation:
Define trawling, and explain the ecological damage associated with it.
Georgie believes that a special juice will increase the productivity of his workers. He creates two groups, two workers per group. Both groups are assigned the same task, stapling a set of papers. Group A is given the special juice to drink while they work. Group B is not given the special juice. After an hour, Georgie counts how many stacks of papers each group has stapled. Group A stapled 1,320 stacks while Group B stapled 2,200 stacks. Georgie concluded that the juice was not effective in improving productivity.
How would you improve Georgie's experimental design to produce a more valid conclusion?
Select one:
a. Georgie should use more than two people per group.
b. Georgie should also consider employee attendance as a variable.
c. Both groups should take the juice, just a different amount of it.
d. Georgie should not do this experiment as it has no practical implications.
Answer:
♡ hi angel ♡
-- your answer is a
~Clara ✧･ﾟ: *
Explanation:
Which of the following organisms is an autotroph?
Answer:
the 4 examples of Autotrophs?
What are Autotrophs?
Algae.
Cyanobacteria.
Maize plant.
Grass.
Wheat.
Seaweed.
Phytoplankton.
Explanation:
Algae, along with plants and some bacteria and fungi, are autotrophs. Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis.
Answer: I think it's a Tree
RNA is a molecule with characteristics and a role similar to DNA. Why is RNA necessary for DNA to fulfill its function?
Answer:
eeee
Explanation:
The study of the cell is called cell biology.
The correct answer is C.
In an organism, the expression of the character is due to the formation of the protein molecule in the body which shows its effect.
Protein is formed by the amino acid and the information stored to code the amino acid is in RNA.
Hence, DNA is converted into RNA for the formation of protein and it is also a checkpoint to avoid the mutation.
Hence, the correct answer is C.
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Section 1
Which example most accurately describes a defense mechanism used by an animal?
A lon pants and sweats during warm weather to remove excess heat
A baby goose recognizes its mother and follows her movements
A beaver stores food as fat and hibemates during cold winter months
An arctic fox changes its fur color to blend in with its surroundings
You
Answer:
An arctic fox changes its fur color to blend in with its surroundings
Explanation:
This is a defense mechanism because when it blends into its surroundings it can hide from its predators and help defend itself
The example most accurately describes a defense mechanism used by an animal is a baby goose recognizes its mother and follows her movements. Thus, option B is correct.
What is arctic fox?An arctic fox changes its fur color to blend in with its surroundings and this is a defense mechanism because when it blends into its surroundings it can hide from its predators and help defend itself.The brown color camouflages the brown fox in the forest.
Adaptation is changing of character of an organism for a short time to survive in severe environmental conditions.The brown color camouflages the arctic fox when the snow melts during the summer. The white color camouflages the arctic fox during the winter.
There are various factors which control the regulation of a gene. Temperature can be a regulatory factor for certain genes. Probably, during the warm temperatures, the proteins regulating the fur colour to become reddish brown become activate these genes. As a result, the fur becomes evident.
Therefore, The example most accurately describes a defense mechanism used by an animal is a baby goose recognizes its mother and follows her movements. Thus, option B is correct.
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A ________ reaction makes people think a person doesn't care. *
0/8
A. anonymous
B. brusque
C. incoherent
D. infuriated
Answer:
Yooooooo answer meee plsss
Explanation:
am nevoie de ajutor cu acest rebus
1
M
2
O
3
T
O
N
O
P
L
A
S
T
4
5
6
7
8
9
10
1 = organit celular cu rol în procesul de respiraţie
2 = organite cu rol în secreţia celulară
3 = nume dat membranei vacuolelor
4= se găsesc la jumătatea fusului de diviziune în timpul metafazei
5 = au rol în procesul de fotosinteză
6 = împreună formează vacuomul celular
7 = coordonează întreaga activitate a celulei
8 = proces prin care se înmulţesc celulele
9 = organit cu rol în diviziunea celulară
10 = organite celulare descoperite de George Emil Palade
An example of a place with a microclimate is
a. a mountain range capped with ice.
c. an orchid growing in a rain forest.
b.a forested park in a desert city.
d. coniferous trees in a temperate forest.
An example of a place with a microclimate is a forested park in a desert city. The correct option is b.
What is a microclimate?
A microclimate is a small and distinctive climatic area that can be artificial or natural. It is present in between another big climatic area. Examples are a park, a valley, a part of a city, etc.
A desert is an area where only sand is present because these areas are very dry and very less vegetation is present here. The vegetation is adapted to the desert climate.
A forested park will be a green area that contains trees and animals. The deserted area is different from the forest area. So a forested area will be a microclimate in the deserted areas.
Thus, the correct option is b. a forested park in a desert city.
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Which bird is best adapted to survive in an environment dominated by seed-bearing plants?
Answer:
hummingbirds
Explanation:
Over many generations, hummingbirds have evolved beaks that are long, thin and well adapted to reach into flowering plants and extract nectar
hummingbirds evolved with long thin beaks and well adapted to reach, extract nectar from flowering plants.
What is bird adaptation ?
An adaptation is any inherited mechanism that makes an organism better able to survive in the changing environment.
It can be structural, behavioral features which help organism to survive.
Example is a hawk's feet and sharp claws are types of adaptations help it to hunt and capture mice.
Another adaptation is habitat where organisms having a specific habitat adapt different features.
Bird beak adaptations is the best example where they use their beaks for acquiring meals, consuming, help in climbing, and protection.
Bird beaks adapted enough to assist them to discover specific meals inside their habitat.
Birds have adapted feathers which make them flight simpler like Long feathers and tail of birds provide them steadiness and insulation.
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The plum pudding model of the atom states that
each atom has an overall negative charge.
each atom has a dense, positively charged center.
an atom is a solid, indivisible sphere that makes up all matter.
an atom is made up of electrons in a sea of positive charges.
Answer:
D
Explanation:
Took the test lol
What biotic adaptations have desert plants made to address the abiotic factors in their environment? a. Desert plants have shallow roots and grow quickly to absorb any soil nutrients before the rain washes the nutrients away. b. Desert plants store water in their leaves or stems and they often have deep or wide-spread root systems to collect as much water as possible. c. Desert plants grow in dense patches for protection against extreme sunlight exposure and have developed fire resistant properties to survive frequent environmental fires. d. Desert plants are low-growing to limit sun exposure
Answer:
Your answer would be B.
Explanation:
Help please!
1. Which of the following is not a function of the cell membrane?
A. Supporting the cell wall
b. Delimiting the cell, separating its internal environment from the external environment.
c. Detecting external environment signals
d. Protecting the cell against the action of various agents
what is a simplified definition of glycolysis
Answer:
the enzymatic breakdown of a carbohydrate (such as glucose) by way of phosphate derivatives with the production of pyruvic or lactic acid and energy stored in high-energy phosphate bonds of ATP.
Answer:
Definition of glycolysis. : the enzymatic breakdown of a carbohydrate (such as glucose) by way of phosphate derivatives with the production of pyruvic or lactic acid and energy stored in high-energy phosphate bonds of ATP.
Explanation:
I just googled a simplified definition
What are some of the reasons that cell division is important to organisms choose all that apply
Answer:
Look below
Explanation:
Growth of organism
Repair of damaged tissues
Healing and regeneration
Reproduction
Answer:
a
Explanation:
Nitrogen fixation is carried out mainly by...
1. Humans
2. Animals
3.Bacteria
4.Plants
If clouds and ice reflect or send back
extra wave lengths, what can you
hypothesize can happen as we continue
to increase global temperatures?
Answer:
Wave lengths will shorten (become less extra)
Explanation: Less clouds and ice will be here once the temperature increases to where ice melts and there isn't enough water to form clouds. Meaning that there wont be extra wave lengths
Spinal Muscular Atrophy is an autosomal recessive genetic disorder in the SMN1 gene that leads to muscle deterioration and is often fatal (leads to death) before affected individuals reach adulthood. Carlos is a heterozygote for the gene. What is his genotype and does he have the disease?
a
AA…yes, he only has the dominant alleles
b
Aa…yes, the dominant allele wins
c
aa…no, he only has the recessive alleles
d
Aa…no, but he is a carrier of the disease
(7th grade question pt2)
If you start with 100 g, how much do you have after 30 minutes?
Answer:
70
Explanation:
9. What is the name of the enzyme that produces ATP in the electron transport chain?
Answer:
Atp synthase
Explanation:
it is happening during the process of Chemiosmosis