Approximately how long ago did our current era begin ? O A. 1 million years OB. 4.5 billion years C. 65 million yearsO O 100, 000 years
Answer:
C. 65 million years ago
Explanation:
The current locations of the continents and their modern day inhabitants, including humans, can be traced to this period.
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Tiny structures inside of cells, such as ribosomes or chloroplasts that have specialized roles are called
Answer:
Tiny structures inside cells such as ribosomes or chloroplast that have specialised roles are called
Mutations are triggered by
Answer:
Mutations can also be caused by exposure to specific chemicals or radiation.
Explanation:
(mark as brainliest please)
Answer:
mutations can be triggered by errors during DNA replication, but also environmental contributions, such as uv light from the sun.
Which would a microscope be LEAST useful in studying?
A. spider
B. amoeba
C. bacterium
D. paramecium
Answer:
A
Explanation:
spiders can be seen with the naked eye
Answer:
A
Explanation:
A spider is large enough to see and observe without a microscope. Bacteria, amoeba and paramecium are all very tiny, and can’t be seen with just our eyes. To see these things, we would need a microscope. Therefore, a microscope would be the least useful when studying A: a spider.
Chargaffs rule states
Answer:
Isn't the Chargaffs a DNA of a rule state that have to be 1/1 ratio.
Explanation:
All the following will give people an indication of your character EXCEPT
Ohow you are dressed.
your body type.
the language you use.
whether you are on time or not.
Brainly if correct 50 points
While Congress has the power to create new laws, they can be vetoed by the President. In addition, the Executive Branch must enforce these laws. What two
different constitutional principles are demonstrated by these relationships?
Select one:
A
checks and balances and separation of powers
B.
separation of powers and eminent domain
C
federal supremacy and due process
D.
separation of powers and quartering of troops
Answer:
A, Checks and balances and separation of powers.
Explanation:
Answer:
The correct answer is:
checks and balances and separation of powers
Explanation:
The system of checks and balances refers to instances in which the powers of the branches of government overlap, such as the Executive and the Legislative branch both having some power over the acts passed by Congress. Separation of Powers refers to instances in which separate branches have completely separate responsibilities, as in creating, interpreting, and enforcing the laws. Both of these doctrines are in place to ensure no branch gains too much power.
Which cellular process creates energy?
A. The conversion of ADP to ATP
B. The breaking of the chemical bond between the 2nd and 3rd phosphate
molecules in ATP.
C. The breaking of lipid chains.
D. The transportation of ions across the membrane.
Thank you!!
Answer:
B. The breaking of the chemical bond between the 2nd and 3rd phosphate
molecules in ATP.
Answer:
The conversion of ADP to ATP if I remember correctly.
what air mass carries warm, moist air
Maritime air masses form over water and are humid.
Answer:Maritime air masses form over water and are humid. Continental air masses form over land and are dry. Therefore, an air mass that develops over northern Canada is called a continental polar air mass and is cold and dry. One that forms over the Indian Ocean is called a maritime tropical air mass and is warm and humid.
Explanation:
hich of the following organisms receives at least some energy from plants?
A.
coyotes
B.
rabbits
C.
deer
D.
all of these
Answer: B
Explanation: Coyotes and deer dont really eat plants like that but deer do sometimes so my best bet is B or C. I hope this is helpful!!
Why should the United States be concerned about air pollution in china
Answer:
The United States should be concerned because many of the things they have is manufactured or made in China . Some things like food or things that could be affected by germs or pollution could affect the users of it and make them sick.
Answer:
c. wind carries air pollution
Explanation:
FIRST PERSON TO ANSWER GETS BRANLYSEST After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased. Which statement explains what happened next? Positive feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to stop secreting insulin. Negative feedback caused his pancreas to produce more insulin. Positive feedback caused his pancreas to produce more insulin.
Answer:
The correct answer B
When the body gets the glucose, the glucose in the blood increase then the hormone insulin is released so that the glucose from the blood can be transferred from blood into the cells of the body.
The release of hormone insulin is a positive feedback.
Once the glucose is transferred into the cells of the body then the negative feedback starts acting that stops the secretion of insulin from the pancreas.
What will happen next is that negative feedback would cause his pancreas to stop secreting insulin.
The maintenance of relatively constant internal body processes depends largely on negative feedback.
Negative feedback mechanisms ensure that setpoints are returned.
Hence, whatever causes setpoints to be breached is reversed or removed totally.
In this case, the continuous secretion of insulin will further lower the blood sugar level and causes the setpoint to be breached further. Thus, the actuator (insulin) has to be removed.
More on negative feedback can be found here: https://brainly.com/question/15379119?referrer=searchResults
Interphase lasts for
of a cell's life
98%
80%
50%
20%
Please help I need help nowww pleaseeeeeee
Answer:
80%
Explanation:
5. In a food web in a freshwater ecosystem, shrimp
and mayflies eat water plants. Leeches eat
shrimp. Trout eat mayflies. Which organism is a
producer?
Answer:
The water plants
Explanation:
Key word, PLANT. All producers take energy from the sun through photosynthesis, only producers can do this.
Which form of nitrogen is most abundant on earth? N2 (Atmospheric Nitrogen) NH3 (Ammonia) NO2- (Nitrite) NO3- (Nitrate)
Answer:
N2 (Atmospheric Nitrogen)
Explanation:
Nitrogen is a chemical element positioned as 7 on the periodic table. Nitrogen is found as a gas in the atmosphere (N2) and constitutes the most part of the air making it the most abundant gas on Earth.
Atmospheric nitrogen (N2) is the most abundant of its form found on Earth. It can be converted to its compound form e.g. nitrates (a plant usable form) by lightning and some bacteria in the soil.
The diet of leaf-cutter ants is principally
a. leaves
b. fungus
c. saliva-coated leaves
d. fungus-treated leaves
Answer:
it would be B.
Explanation:
Answer:
b. fungus
Explanation:
Birds, lizards, and amphibians are very different groups of animals. However, these groups share some qualities that help them survive. Which of the following is an example of such a quality? A. Birds, lizards, and amphibians have fur to keep their bodies warm. B. Birds, lizards, and amphibians produce milk to feed their young. C. Birds, lizards, and amphibians reproduce by laying eggs. D. all of these
Answer:
The answer is C
Explanation:
Brainliest?
Answer:
C.
Most mammals don't lay eggs, but platypuses do
A. Only mammals have fur
B. Mammals produce milk
D. The first two were wrong
Explanation:
Drag each label to the correct location on the image
Arrange the symbols to form a DNA molecule.
5
3
5
3'
Answer:
The right answers are mentioned in the picture.
A base pair (bp) is the pairing of two nucleobases located on two complementary strands of DNA or RNA. This pairing is carried out by hydrogen bridges. There are four types of nucleic bases: A-T-C-G, these letters Adenine, Thymine, Cytosine, and Guanine. A with T and C with G.
It is also necessary to take into account the antiparallel character of the DNA strands. If a strand is in the 5 '3' direction, its complete strand is in the 3 '5' direction.
Explanation:
Which of the earths sphere is by far the largest?
Directional selection only occurs in response to naturally occurring events.
Please select the best answer from the choices provided
Тrue
False
Answer:
False
Explanation:
Directional selection is a force in nature that causes a population to evolve towards one end of a trait spectrum. This change happens gradually and is hard to notice over a short period of time. This change is consistent and constant.
The oak and the maple are two different species of trees that also belong to different genera. However, these oak and maples do share many characteristics. Based on their similarities, which levels of classification would they share?
Answer:
Maple and oak trees are both deciduous angiosperms, so the wood each produces is classified as a hardwood. However, the difference between maple and oak wood is significant, and it would be difficult to mistake one for the other. All species of oak display a distinctive well-defined grain pattern whereas the maple wood grain tends to be creamy white with little visible grain. The differences don't stop there, but to really appreciate them, it's important to realize that within the broad category defined by oak is a subset of species that differ significantly from each other. The same is true for maple
Am I right?? I am not sure ... just tryna help
Many fish in the lake die due to an increase in water temperature. What Limiting Factor is this an
example of? *
A. Competition
B. Predation
C. Temperature
D.Natural Disaster
Answer:
C, Temperature
Explanation:
Increase in water heat, changes the temperature levels for the water itself, and including that it may be even warmer towards the bottom of the lake.
How does soil quality affect the characteristics of ecosystems?
9 Light cannot escape the intense gravitational pull of a
black dwarf
red giant
main-sequence stan
black hole
Because the trees that produce the sap to make rubber need to be cut down to make it, rubber is considered a nonrenewable resource.
TRUE
FALSE
Please help me!!
Answer: false
Explanation:
The raw material of making rubber products is the natural latex we collect from the rubber tree. Therefore, the answer is Yes. The rubber is a renewable resource. What's more, most of rubber products are made by reclaimed rubber.Hope this helps!
why do lichens and mosses get mostly replaced by larger plant species during succession
Answer:
Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil. Mosses can then colonize the thin soil; as mosses die, the soil thickens more allowing other hardy species to colonize
Explanation:
What did Mendel's cross-pollination of pea plants prove?
A. Inheritance of certain factors is dependent upon the genetic code.
B. Certain factors are dominant, and other factors are recessive.
C. All the cells in an organism carry the same hereditary factors.
D. Crossing a tall plant with a tall plant will always result in a tall plant.
Answer:B
Explanation:
Answer: The correct answer is B- Certain factors are dominant, and other factors are recessive. :)
Explanation:
I took the test. I also had to read a lot about Mendel for my science class.
Hope this helps! <3
Which trend in hominid evolution can be supported by fossil evidence?
Walking upright
Use of tools
Increased intelligence
Decorating cave walls
Question 12
Identify and select the the correct vocabulary that correctly describes DNA. Choose ONLY the correct answers, pick 3.
Answer:
I personally answered:
nucleotides with adenine, guanine, cytosine, or thymine are the monomers
thymine base pairs with adenine
guanine base pairs with cytosine
Explanation:
How many ATP are generated in the electron transport chain?
O 2
04
O 32
0 36
Answer:
32
Explanation:
