PLS HELP! When I let go of a rock it falls down. What happens explain
Answer:
Gravity
Explanation:
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Introducing substances into the air that may be harmful to living organisms or the environment is called
A) photolysis
B) eutrophication
C) air pollution
D) the chimney effect
E) entropy
Flowering Locus C (FLC) is a gene that is responsible for flowering in certain plants. FLC is expressed in new seedlings, which prevents flowering. Upon exposure to cold temperatures, FLC expression decreases and the plant flowers. FLC is regulated through epigenetic modifications. What type of epigenetic modifications are present in new seedlings and after cold exposure
Answer:
- New seedlings: histone acetylation
- After cold exposure: histone methylation
Explanation:
Vernalization is an adaptive mechanism whose objective is to ensure that flowering occurs only after winter (i.e., after cold conditions). In certain plants, this process (vernalization) suppresses the expression of genes that encode repressors of flowering. In Arabidopsis, vernalization is associated with histone modifications at FLC chromatin. The FLOWERING LOCUS C (FLC) is a MADS-box gene that acts as a repressor of flowering in Arabidopsis. Epigenetic modifications control the expression of the FLC gene. The FLC gene is expressed at low temperatures due to histone acetylation at FLC chromatin, and thereby the expression of FLC mRNA transcripts ensures that the Arabidopsis plant cannot flower. Subsequently, as the Arabidopsis plant is exposed to cold, FLC is repressed by the accumulation of trimethylation on lysine 27 of histone 3 (H3K27me3), thereby allowing it to flower when temperatures become warmer.
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Select the correct answer from each drop-down menu.
What type of grain farming generally occurs in the United States?
This type of farming relles heavily on
Farmers in the United States are engaged in
to cultivate large areas of land.
Answer:
Corn.
Explanation:
Corn is a type of grain farming generally occurs in the United States because of its demand to the livestock sector of United States of America. This corn crop is cultivated by farmers on large areas of land in order to fulfill the requirements of the livestock sector. Corn is a cash crop and can be cultivated in different states and regions of United States such as Illinois, Iowa, Indiana, eastern portions of South Dakota and Nebraska, western Kentucky and Ohio.
A scientist is observing various phenomena in the environment. He wants to plot the position of various objects as a function of time. Which plot will yield a periodic wave?
A.
the position of a baseball player rounding the bases
B.
the position of a roller-coaster car traveling along a track
C.
the position of a sticker on a wheel rolling along the road
D.
the position of a raindrop falling to the ground
Answer:c
Explanation:
Answer:
c
Explanation:
the position of a sticker on a wheel rolling along the road
Question 4
Generally, the more a food has been altered from its original form, the less healthy it
is.
A.) True
B.) False
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Which statement is part of Darwin’s theory of evolution by natural selection?
A). Acquired characteristics that are inherited are the cause of evolution.
B). The organisms that are the fittest are always largest and strongest.
C). The number of offspring is not related to fitness.
D). More offspring are produced than can possibly survive.
After fertilization, the successful development of a mature, full-term fetus depends on A. The release of human chorionic gonadotropin (hCG) by the developing placenta AND the production of estrogen and progesterone by the placental tissues B. the release of human chorionic gonadotropin (hCG) by the developing placenta C. maintenance of the corpus luteum for all 9 months D. all of these E. the production of estrogen and progesterone by the placental tissues
Answer:
The correct option is A (The release of human chorionic gonadotropin (hCG) by the developing placenta AND the production of estrogen and progesterone by the placental tissues).
Explanation:
The developing placenta release Human chorionic gonadotropin (hCG) during pregnancy. What this hormone does is tell the body (corpus luteum) to produce progesterone to maintain the pregnancy. The presence of Human chorionic gonadotropin is a sign of pregnancy, meaning successful fertilization had happened, and implantation of the embryo had occurred too, preventing another cycle of menstruation.
The successful development of a mature, full-term fetus also depends on estrogen which during pregnancy aids the formation of blood vessels and also aids fetal maturation. While progesterone is a hormone when released during pregnancy helps maintain a healthy pregnancy.
Which of these statements is most likely correct about Location A and Location B?
Location A and Location B will be equally cold because they are on the same
latitude.
Location B will have cooler summers and warmer winters than Location A.
Location A and Location B will be equally warm because they are on the same
latitude.
Location A will have cooler summers and warmer winters than Location B.
Answer:
Location A will have cooler summers and warmer winters than Location B
Explanation:
This is because costal areas are cooler in the summer and warmer in the winter than inland areas along the same latitude
Who suggested that the distance of a galaxy is proportional to its recessional speed
Answer:
Edwin Hubble
Explanation:
Which feature must a community have in order to use wind energy?
A. An average elevation change of 20 feet per mile to allow the wind
to flow downhill
B. Molten rock near groundwater supplies
C. Nets to keep birds and bats away from the turbines
D. An average wind speed of at least 15 miles per hour and enough
land to build several wind turbines
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molten rocck near ground water supplies
Which of the following is a way in which the atmosphere does NOT
interact with the hydrosphere? *
A). Decreasing the salinity of oceans from increased temperatures causing glacial
melting.
B). Developing hurricanes over warm ocean currents.
C).Increasing the amount of water evaporation from oceans and global temperatures
rise.
D). Gases moving sediment from hill tops
For centuries, scientists believed that light waves traveled through a substance called "aether." Which of the following facts refutes this belief?
A.
Light waves can propagate through a vacuum.
B.
Aether has never been observed.
C.
Light waves can have many different wavelengths and frequencies.
D.
Light waves can travel extremely long distances.
bAnswer:
Explanation:
Which part always comes FIRST in the scientific name?
Answer:
The first part of the scientific name is the genus, and it is always capitalized. (The plural is "genera"). The second part is the species epithet. The entire name is written in italics.
Explanation:
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Which statement correctly shows the flow of energy in a food chain?
A.
Producer→ heterotroph → decomposer
B.
Producer ← consumer ← decomposer
C.
Autotroph← decomposer ← consumer
D.
Autotroph→ decomposer→ heterotroph
Answer:
Producer→ heterotroph → decomposer
Explanation:
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1. Which data shows that Neanderthals are not the ancestors of modern humans?
A.Differences in Neanderthals and human DNA.
B.Evidence from Neanderthals burial grounds
C.Muscular build of Neanderthals as compared to humans
D.Patterns of Neanderthal extinction.
2. Which mammal is most closely related to bats (chiropterans)
A. Carnivorans
B. Xernarthans
C. Primates
D. Rodentains
3. Which radioactive isotope would be used to determine the specific age of a Paleozoic rock formation?
A. Beryllium-10(1.5 million years)
B. Carbon-14(5715 years)
C. Thorium-232(14 billion years)
D. Uranium-235(704 million years)
4. According to the Hardy- Weinberg principle, which situation would disrupt genetic equilibrium?
A. A large pop of deer inhabits a forest region.
B. A particular pop of flies mates randomly.
C. A pop of flowering plants always has the same group of natural predators.
D. A small pop of birds colonizes a new island.
5. According to the endosymbiont theory, which part of the eukaryotic cell evolved from a prokaryotic cell?
A. Chloroplast
B. Golgi apparatus
C. Nuclease
D. Ribosome
Answer:
C. Muscular build of Neanderthals as compared to humans
D. Rodentains
A. Beryllium-10(1.5 million years)
D. A small pop of birds colonizes a new island.
B. Golgi apparatus
When sea ice melts, there will be a significant amount of sea level rise.
O True
O False
It will be true, since the ice bergas that fall off can be as big as a 98-164 feet. Form what I have resched
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Answer:
B or the second answer
Explanation:
Answer: I think It is B
Explanation:
Carbon has an atomic number of 6. Which of the following does the atomic number 6 tell you about carbon?
Answer:
The atomic number only tells you how many protons an element has, regardless of the amount of neutrons etc.
Carbon 6 therefore has 6 protons, and that's the only thing you can deduce from its atomic number.
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Answer:
I think it is hawk.....................
Answer: The answer is Snake
Explanation: Hope this help :D
Counting a few organisms with in a population and multiplying that number
to estimate the total size of a population is an example of *
Using what you read in this passage, evaluate the following vacation
activities. Which one would cause the least disruption of the balance of
the coral reef?
A
Sport fishing on the reef
B
Scuba diving to view the reef species
с
Collecting rocks and shells as souvenirs
D
Attracting sharks to the reef with bait for photos
From the listed human activities, Scuba diving to view the reef species though disruptive, would produce the least disruption to the balance in the coral reef.
What are coral reefs?Coral reefs are narrow and shallow stretches land where corals ate found and these corals serves as foundation for reefs to form.
The reef is an ecosystem consisting of algaes and fishes as well as some other aquatic organism.
The balance in coral reefs can be disrupted by human activities such as:
Sport fishing on the reefCollecting rocks and shells as souvenirsAttracting sharks to the reef with bait for photosHowever, Scuba diving to view the reef species though disruptive, would produce the least disruption to the balance in the coral reef.
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What do folded mountains indicate happened in an area?
(A) Tectonic plates have been sliding past each other
(B) Tectonic plates have stopped moving and remained still.
(C) Tectonic plates have been travelling away from each other.
(D) Tectonic plates have collided and pushed against each other.
Answer:
Fold mountains are created where two or more of Earth's tectonic plates are pushed together. So I'm pretty sure its D.
Explanation:
Fill in the blank...
Question: Matter____ ecosystems.
Options:
A. flows out
B. is found only in
C. stays in the same parts of
D. cycles around
4 Why will alcohol keep on boiling even after the flame was turned down?
The alcohol keep on boiling even after the flame was turned down, Alcohol has a lower boiling point than water.
What do you understand by the term boiling point?The boiling point is the temperature at which the substance passes from a liquid to a gaseous state.
Thus, Alcohol has a lower boiling point than water.
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Which of the following is not a function of a vertebrate’s endoskeleton?
a.) Increase speed of digestion
b.) Protect major organs
c.) Offer support and structure
d.) Connect with muscles to create movement
Increase speed of digestion is not a function of a vertebrate’s endoskeleton. So, the correct option is (A).
What is Endoskeleton?
The rigid part which provides internal support of the structure is called endoskeleton which develops from endoderm and is called a living structure. Some examples of endoskeleton are cartilage, bone etc. The hard part that is on the outside of the body that protects the soft tissues and muscles is called the exoskeleton.
Vertebrates are animals that have a backbone and an endoskeleton which is a skeleton inside their body while invertebrates are animals that do not have a backbone. Invertebrates may have a skeleton on the outside of their body called an exoskeleton, while some invertebrates have no skeleton at all.
It protects major organs, offer support to the structure, connect the muscles to create movement.
Thus, Increase speed of digestion is not a function of a vertebrate’s endoskeleton. So, the correct option is (A).
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Which of the following would be classified as a renewable resource?
O A barrel of oil that would take 8 million years to form.
A large piece of coal that would take 4 million years to form.
O Solar rays from the Sun that take 8 minutes to reach the Earth.
O Methane gas from the ocean floor that takes 7 thousand years to outgas.
A person is observing the oscillations of a wave. If the wave source begins to move away from the person, what will the person notice?
A.
The wavelength will decrease.
B.
The wave appears to have a different amplitude.
C.
The wave appears to change speed.
D.
The wave appears to oscillate at a different rate.
the wave appears to oscillate at a different rate
What is climate change? O A. Lange-scale changes to weather patterns B. Increasing temperatures only C. Natural cycles of cooling and heating D. Decreasing temperatures only
Answer:
C. Natural cycles of cooling and heating is the best option.
Explanation:
C. is the only answer that describes climate, the others describe weather. Climate is natural conditions over a long period of time while weather is over a short period of time.
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