Birth control pills that release a constant amount of synthetic estradiol and progesterone for 21 days, followed by 7 days during which no hormones are ingested maintain constant levels of hormones in the body. The Correct option is B
This constant hormone level prevents the hypothalamus from releasing gonadotropin-releasing hormone (GnRH) which decreases the release of luteinizing hormone (LH) from the pituitary gland. Without the LH surge, ovulation does not occur, which is the primary mechanism of action of the birth control pills.
In addition, birth control pills thicken cervical mucus, making it harder for sperm to reach the egg, and also thin the uterine lining, making it less hospitable for a fertilized egg to implant. These actions collectively prevent pregnancy when taken correctly.
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Complete Question:
Which of the following statements describes the effects of birth control pills that release a constant amount of synthetic estradiol and progesterone for 21 days, followed by 7 days during which no hormones are ingested?
A) Birth control pills maintain constant levels of estrogens and/or progesterone so that the hypothalamus releases GnRH to stimulate FSH secretion and oocyte maturation.
B) Birth control pills maintain constant levels of estrogens and/or progesterone so that the hypothalamus decreases release of GnRH blocking a surge in LH and ovulation does not occur.
C) Birth control pills maintain constant levels of estrogens and/or progesterone so that the hypothalamus releases GnRH to stimulate LH secretion and ovulation does not occur.
D) Birth control pills inhibit the development of the uterine lining so that implantation of a fertilized oocyte cannot occur.
A student tested food samples for the presence of various nutrients and recorded her findings in
the data table below. A"+" denotes that the nutrient was present in the sample. Adenotes that
the nutrient was absent. Use the student's data to answer the next 3 questions.
Nutrient
Glucose
Starch
Protein
Lipid
Sample 1
Sample 2
Sample 3
Sample 4
Based on the student's data, which food sample(s) would contain amino acids?
O sample 3
O Samples 1 and 4
O sample 2
O samples 2 and 3
Answer:
4mhky4stjs reste w test
Explanation:
hjentekrwjetbwtfhwtjt3j3tj
Which gland is known as the "master gland" because it sends chemical messages to many other glands?
Answer: pituitary gland
What is the difference between your biological sex and your gender identity?
Answer:
Biological or assigned sex is about biology, anatomy, and chromosomes and Gender is society's set of expectations, standards, and characteristics about how men and women are supposed to act.
Explanation:
Hope this helps!
biological sex is what gender you were born as and what's on your birth certificate. however, a persons gender identity is a persons own choice. it's what you classify yourself as and what you feel comfortable as, despite your biological sex. many people don't even identify as anything or they change their preference of pronouns. gender identity also comes with stereotypes given by the community and what they see fit for genders.
The vocal cords stretch across the opening of the larynx. True or false??
Answer:
True
Explanation:
Vocal cords are bands of smooth muscle tissue located in the larynx. When air passes through, the vocal cords vibrate.
Yall Im struggling, if u cant read it, the question is “why does a mountain climber need an oxygen supply at very high altitudes, even tho the air still contains 21% oxygen?
Answer: Because it is harder to draw breath in. And the cold
Explanation: At higher altitudes, it becomes more dangerous, and you can develop altitude-related illnesses such as HAPE and HACE. I read a book called Into Thin Air, and in the book the author goes into detail on the details/complications of climbing Mt.Everest and oxygen needs. Mountain climbers use canisters of oxygen called Supplemental Oxygen.
Plant life in wetlands is not
different from plant life In other areas.
True
False
Material rising from the mantle reaches the surface at spreading centers.
A. True
B. False
Yes, It's true!
Explanation:
Material rising from the mantle reaches the surface at spreading centers.
A. True
B. False
What sentence best supports the statement that hormones are involved in the regulation of homeostasis?
A.
The hormone cortisol suppresses the immune system and is produced when the body is under stress.
B.
The hormone oxytocin promotes labor contractions of the uterus during childbirth.
C.
The hormone melatonin induces sleep and its production is slowed by exposure to light.
D.
The hormone erythropoeitin increases the production of red blood cells when oxygen levels are low.
Answer:
D
Explanation:
It is an homeostatic process
Without genetic variation, natural selection would not be possible. Explain why.
Answer:
Without genetic variation, natural selection is only able to grow the number of allelomorphs that previously exited in the population. Natural selection occurs through an interaction between the environment and the variability of the individual organisms making up a population. If every giraffe had the same neck length, there would be nothing to change and they would never have a long neck by now.
True or False.
A group of the same species of living things in an area is a population
Answer:
True.
Explanation:
A population is a group of organisms of the same species that live in the same area at the same time
Answer:
True!
Hope this helps.
Which of the following statements is FALSE?
A. RNA is a single stranded molecule
B. RNA contains uracil
C. RNA is found only in the cytoplasm.
D. RNA contains ribose
Answer:
C
Explanation:
RNA is found mostly in the nucleus but can also be found in the cytoplasm, but it is not limited to it.
Phineas and Ferb build a flying machine. They accelerate into the air in a
straight line, going from 0 m/s to 30 m/s in 3 s. Find their average
acceleration.
10
30 dived by 3 = 10
hope it helps
The EPA sets national air-quality standards for common air pollutants. The
data table shows the change in concentrations of these pollutants over time.
Emissions Reductions and Air Quality
Data period
Reduction
Pollutant
Improvement
(from/to)
in emissions (%) in air quality (%)
СО
69
85
Pb
99
98
1980 - 2014 NO,
55
60
0,
53
33
81
80
16
30
2000 - 2014
33
36
SO2
PM,
PM25
Which conclusion do the data support?
The data support the conclusion that reducing emissions leads to improvement in air quality for the common air pollutants monitored by the EPA.
What is EPA?The Environmental Protection Agency (EPA) is a federal agency of the United States government that was established in 1970 to protect human health and the environment. The EPA's mission is to ensure that all Americans have clean air to breathe, clean water to drink, and safe land to live and work on. The agency is responsible for setting and enforcing national standards for air and water quality, as well as for managing toxic waste and other pollutants.
The EPA also works with other federal agencies, states, tribes, and local governments to address environmental challenges, such as climate change, ozone depletion, and exposure to hazardous substances. The EPA uses a range of tools and programs, including research and development, regulation, partnerships, and education and outreach, to achieve its mission. The agency also provides information and technical assistance to help individuals, communities, and businesses protect the environment and public health.
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Answer:
B . With monitoring, the concentration of every pollutant has decreased
Explanation:
What thing controls the functions of the different cells ? (Hint it is inside the nucleus)
Answer:
DNA
Explanation:
It's the genetic material that writes up who we are.
But if it's discussing an organelle, then it's the nucleus.
Have a great day!
A student tries to push a refrigerator-sized box of textbooks safely across the classroom.
The box does not move. He asks for help from other students.
The box starts to move when the number of students shown in the image is pushing together.
Based on this information, what conclusion can be drawn?
The box has a mass greater than the combined mass of the first two students pushing.
The forces acting on the box became unbalanced when the third student started pushing.
The only force acting on the box is the push applied by the students.
When the third student started to push, the box’s mass decreased
Answer:
The forces acting on the box became unbalanced when the third student started pushing.
Explanation:
The horizontal forces, friction and applied, were balanced until more force was applied than friction. Mass can't increase or decrease.
Answer:
The forces acting on the box became unbalanced when the third student started pushing.
Explanation:
What is the correct term for organisms that consume other organisms in order to gain energy and are also known as consumers?
A) Heterotrophs
B) Decomposers
C) Detritivores
D) Autotrophs
Answer:
Heterotrophs
Explanation:
A heterotroph is an organism that eats other plants or animals for energy and nutrients.
The correct term for organisms that consume other organisms in order to gain energy and are also known as consumers is Heterotrophs; option A.
What are heterotrophs?Heterotrophs are organisms which cannot produce their own food but rather depend on other organisms for its food.
Heterotrophs consume other organisms such as plants and other animals for the production of energy.
Therefore, the correct term for organisms that consume other organisms in order to gain energy and are also known as consumers is Heterotrophs; option A.
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match the choices with each box.
Answer:
1 is totipotent
2 is mutipotent
3 is pluripotent
4 is totipotent
5 is pluripotent
6 is mutipotent
Explanation:
I honestly dont know sorry if they r wrong
Which of these contributes the most oxygen to our planet?
a. Photosynthetic fungi
b. The Amazon Rain forest
c. the National Forests
d. Phytoplankton
Answer:
D. Phytoplankton
Explanation:
The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize.
Have a wonderful day! <3
Answer:
D
Explanation:
this is because the ocean produces the most oxygen and most of that comes from plankton in the ocean
What is the structure of a virus?
Answer:
The simplest virions consist of two basic components: nucleic acid (single- or double-stranded RNA or DNA) and a protein coat, the capsid, which functions as a shell to protect the viral genome from nucleases and which during infection attaches the virion to specific receptors exposed on the prospective host cell.
A virion consists of a nucleic acid core, an outer protein coating or capsid, and sometimes an outer envelope made of protein and phospholipid membranes derived from the host cell. The capsid is made up of protein subunits called capsomeres. Viruses may also contain additional proteins, such as enzymes
If you wanted to find an ant's stomach, where would
you look?
a. Inside its head
b. Inside its cephalothorax
c. Inside its thorax
d. Inside its abdomen
Answer:
d. Inside its abdomen
Explanation:
Hope this helps!
Match each description with the correct ecosystem.
This ecosystem experiences sudden changes in water level and temperature.
This ecosystem contains a mix of fresh water and salt water.
This ecosystem supports many plants, which provide food for schools of fish.
Answer:
1 - B or intertidal zone
2 - A or estuary
3 - C or neritic zone
Explanation:
These are the correct answers, I took the test on edge, have a great day!!
Answer: B, A, C,
Explanation:
I did it and got it right
When do populations increase?
Answer:
c
Explanation:
i have seen this before and i got it correct i dont know if it works with you?
A student knows the width and
length of a dresser. What else
should she measure so she can
calculate the volume?
A. Mass
B. Density
C. Height
Answer:
C. Height
Explanation:
The volume of a rectangle is Length x width x height.
The student has only measured the width and length so far, the only thing left to measure is the height.
The other answers don't make sense.
Hope this helps!!
- Kay :)
Answer:
c
Explanation:
HELP ASAP WILL GIVE BRAINLISET Which of the following describes the Cell Theory?
Group of answer choices
(A)All
(B)All living things are composed of one or more cells.
©Cells are the basic unit of life
(D)Cells are produced from existing cells
Answer:
C. Cells are the basic units of life.
Explanation:
Mitosis is done by your body cells. What types of cells do not undergo mitosis
Answer:
Sex cells/ gametes
Explanation:
how are viroids different from viruses
Answer:
We are all familiar with the basics of viruses: These particles infect living cells and wreak havoc throughout the body. But viruses aren’t the only villains around causing chaos in living things. Other infectious agents called viroids and prions — which are also tiny but powerful — can take down both plant life and entire animals.
Viroids are free RNA molecules of low molecular weight without any protein coat, while viruses can have either RNA or DNA molecules encapsulated in a protein coat. Viroids are smaller in size than viruses.
Viroids not made of cells.
Viroids don’t transform energy.
Viroids can’t reproduce on their own.
What happens during S phase?
Answer:
DNA is replicated
A mRNA codon is AGC. The tRNA anticodon will be
the carbon cycle review of terms
Answer:
A solid line would represent point on the graph that actually are included in the solution, while points that lie on dash lines aren't included in the solution.
The carbon cycle takes place in the environment, where plants, herbivores, consumers, and decomposers are present and fix the carbon in the environment.
What is the carbon cycle?The carbon cycle is important for the environment because carbon is present in the animal cell, in food, etc., and the carbon cycle is present in the given diagram. Here, the plant takes in the atmospheric carbon dioxide shown in the arrow 1, and the carbon dioxide is released by the animals and plants shown in the arrow 2.
Arrow 3 explains the rabbit taking the carbon from the food source, the plant releases oxygen and arrow 4 explains the carbon released by the decomposers from the animals and plants; and arrow 5 shows the carbon converted into fossil fuels. Arrows 6 and 7 both explain the release of carbon dioxide while plants use it for food synthesis.
Hence, the carbon cycle takes place in the atmosphere, where plants, herbivores, consumers, and decomposers are present and fix the carbon in the environment.
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What change caused the rate of population growth to increase around point C?
Answer:
point c
Explanation: