Answer:
B) blood levels of estrogen and progesterone decrease
Explanation:
Menstruation is a normal phenomenon in a fertile female. It is the biological process whereby the flow of blood from the uterine lining occurs. Menstruation usually occurs after implantation, which is the attachment of a fertilized egg in the uterus, fails to occur.
On a monthly basis, the female reproductive organ prepares the uterus for implantation, which is physiological stimulated by an increase in the blood levels of estrogen and progesterone. However, when there is no implantation, the level of these two reproductive hormones (estrogen and progesterone) fall, and menstruation is stimulated to occur.
Menstruation occurs when the blood levels of oestrogen and progesterone decrease.
Menstruation can be described as the release of blood from the reproductive tract of a female. This cycle is mainly driven by the female hormones such as oestrogen and progesterone. During this period, the level of the oestrogen and progesterone drastically reduces.
Blood flow lasts between 1-5 days but it differs in different females, it last for 3 days in some and 5 days in some other ladies and is most times accompanied with cramps.
For more information on Menstruation please see the link below for more information
https://brainly.com/question/23422081?referrer=searchResults
From the organ systems listed below, select the correct sequence of organs found in each system.
OOOO
cardiovascular, digestive, endocrine, urinary, integumentary
heart, stomach, lungs, kidneys, hair
heart, liver, pituitary gland, kidneys, skin
blood vessels, pancreas, kidneys, lungs, n
Diploid eukaryotic cells have two haploid sets of chromosomes, one contributed by the mother, the other contributed by the father.A. TrueB. False
Answer:
True.
Explanation:
Diploid eukaryotic cells have two haploid sets of chromosomes, one contributed by the mother, the other contributed by the father because sexually producing organisms like humans normally have diploid set of chromosomes which is contributed each by the two parent. The cells in humans that that are haploid set of chromosomes are the sex cells which is egg and sperm.
The egg and sperm fuse to together through reproduction a d fertilization occur when the sperm fertilizes the egg and the haploid set of chromosomes dude to form diploid set of chromosomes which is the offspring .
The basic unit of ______________ in the metric system is the gram. Group of answer choices length volume density mass
Answer:
Mass.
Explanation:
It's mass. Example: when a baby is born, is he (or she) measured in grams, or in pounds?
What type of rock is formed from cooling magma? Select all that apply.
Clastic
Marble
Basalt
Granite
magma is the rock that is formed underground so when it comes on earth it'll cool down and form marble
which is worst type of oil
Answer:
the worst type of oil is olive oil and corn oil
Answer:
Palm oil
Explanation:
Although palm oil is considered to be one of the most sustainable crops of its type, it is a also $40,000,000,000 industry notorious for the detrimental damages it has caused to the environment. Here are some examples of the effects its industry has had on nature:
wiped out multiple rainforestsdisplaced several indigenous tribesruined shelter of endangered speciesWhich is one phenomenon that can cause waves to form in the ocean? strong winds Coriolis effect differences in water density gravitational pull of the moon
Answer:
A(strong winds)
Explanation:
did the test on edg
Which type of environmental scientist is likely to study methods of water conservation and decontamination?
a. Hydrologist
b. Toxicologist
C. Oceanographer
d. Ecologist
Answer:
A. Hydrologist
Explanation: A hydrologist is the environmental scientist who is likely to study methods of water conservation and decontamination. He is the person who carries out research on circulating, distributing and studying physical properties of the underground surface of the earth, and its surface waters.
Which action is designed to increase the safety of a person carrying a microscope from one place to another?
putting a cover over the microscope
setting the microscope to the high-power objective position
wrapping the electrical cord around the arm of the microscope
raising the stage of the microscope until it touches the objective
Answer:
wrapping the electrical cord around the microscope
Explanation:
i took the test
The action that is designed to increase the safety of a person carrying a microscope from one place to another is as follows:
Wrapping the electrical cord around the arm of the microscope.Thus, the correct option is C.
What is a Microscope?A Microscope may be defined as a laboratory instrument that constructs an enlarged image of a small object such as cells and thus illustrating details too small to be seen by the unassisted eye.
In order to increase the safety of a person that holds a microscope and wants to shift it from one place to another via protecting by wrapping the electrical cord around the arm of the microscope.
The arm of the microscope is the place that is generally people hold when they carry a microscope from one place to another.
Therefore, the correct option for this question is C.
To learn more about Microscope, refer to the link:
https://brainly.com/question/15744335
#SPJ5
Would you be able to survive if your body only had one type of cell?
Answer:
yes
Explanation:
you would be able to survive
If the human's body only had one type of cell, they will not be existing. Hence, the answer is no.
The human body is the most complex of all living organisms. It is made up of trillions of cells that are organized into tissues, organs, and organ systems with each organization carrying out different functions. Without these organizations, humans will not be able to carryout essential life processes and as such, not able to survive.
If the trillions of cells are just one type of cell, then, only one tissue, organ, and organ system can be formed. The cells had to differentiate in order for them to be organized into different tissues, organs, and organ systems
In other words, if your body had only one type of cell, the different biological processes being carried out would not be possible and you would not survive.
More on cell differentiation can be found here: https://brainly.com/question/20622090
How do cells replace themselves?
A student will measure and record the growth (in height) of two flowering plants every other day for 20 days. Each plant will receive 200mL of water each day, but only one plant will receive 10mL of fertilizer. What is being tested? Do flowering plants grow better with salt water? Does fertilizer help a plant grow taller? How tall do these flowering plants grow? How much fertilizer do flowering plants need?
Answer:
Does fertilizer help a plant grow taller?
Explanation:
Every experiment begins with an observation, which then leads to a scientific question that can be tested. In this question, a student measures and records the growth (in height) of two flowering plants every other day for 20 days. He then waters each flowering plants with same amount of water (200mL) but adds 10mL fertilizer to only one group of flowering plant.
This experimental set up implies that fertilizer is the independent variable or manipulated variable of the experiment while the dependent/measured variable is the growth (height) of plants.
N.B: 200mL of water is a constant or controlled variable
Hence, based on the identification of the independent and dependent variables, it can be said that the student is testing IF fertilizer will improve the growth in height of the flowering plants, hence, the scientific question will be: DOES FERTILIZER HELP A PLANT GROW TALLER?
Which of the following accurately describes Poiseuille's law?a. blood flow is not related to resistance. b. if resistance increases, flow increases. c. if resistance increases, flow decreases. d. viscosity of the blood is not related to flow. e. pH of the blood influences flow.
Answer: Option C.
if resistance increases, flow decreases.
Explanation:
if resistance increases, flow decreases describe Poiseuille's law because it explain the relationship between fluid flow and the viscosity of the fluid, length and width of the turning. The law describe fluid flow is related to length and radius of tubing and viscosity. Increase in resistance will result in decrease in flow rate because flow and resistance are reciprocally related in one way or the other.
what is the most important nutrient for energy?
Subduction of the ocean floor occurs in _______.
Answer:
crust closer to a mid-ocean ridge moves away from the ridge and toward a deep-ocean trench. Sea-floor spreading and subduction work together.
Explanation:
How are DNA and growth/development related?
Explanation:
Deoxyribonucleic acid (DNA)is a molecule composed of two polynucleotide chains that coil around each other and growth is the increase of size in a child while development is the process in which a child develops his or her skills
Scientific theories are explanations for naturally occurring events or phenomena. Although scientific theories require extensive observations and experimentation, they can change over time as new evidence is discovered. Scientific laws are principles that are also based on extensive observations and experimentation. Although scientific theories can develop into laws, a theory can only be declared a law if it is proven to be without exception under certain stated conditions. Which of the following is true regarding scientific theories,laws, and knowledge? A. New scientific knowledge is gained by memorizing scientific theories and laws. B. Scientific knowledge must be proven by both scientific theories and laws. C. Scientific theories can lead to scientific knowledge, but scientific theories are not related to scientific knowledge. D. Scientific theories and laws develop from the acquisition of scientific knowledge.
Answer:
C
Explanation:
scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it.
Answer:
Scientific theories and laws develop from the acquisition of scientific knowledge.
Explanation:
). How many total electrons does a neutrally charged carbon atom contain in its orbits? How many electrons are in its innermost orbit (closest to the nucleus)? How many are in its outermost orbit?
Answer:
6 electrons
2 electrons
8 electrons
True or False??? Help A substance in which other substances dissolve is called a solute.
Answer: false
Explanation:
Solute is the substance that dissolves
Solvents is the substance that dilutes dissolve in to make a solution eg ocean water is a solution of salt and water
Water being the solvent and salt being the solute
Hopefully you are getting the picture that science is a dynamic process, always changing as new information arises. Any individual experiment may include one or more of the components that have been discussed because there is no one formula for a successful scientific inquiry and no single rule book that is rigidly followed. So what does all this experimentation and data collection lead to? Firstly, research results have no impact if they are not shared with a community of peers and eventually society as a whole. Scientists working in the same research area often check each others results by repeating similar experiments. There is a great deal of both cooperation and competition in the scientific community. Contrary to popular belief science is in fact an incredibly creative process, that includes elements of challenge, surprise, careful planning, patience and persistance. It is the inquisitive mind that drives scientific progress.
Now that you have been more thoroughly introduced to the nature of science, lets try that survey from the beginning of this unit again.
1. A scientific hypothesis is best described as an "educated guess."
2. Failure to disprove a hypothesis proves that the hypothesis is correct.
3. Scientific theories are never questioned.
4. A scientific theory is based on educated guesses and is not backed up by facts/data.
5. Scientists that contribute data that contradicts an established theory are not highly regarded in the scientific community.
6. In order for an investigation to be considered scientific, a controlled experiment must be used.
7. Scientific facts are never questioned.
8. Science can only answer questions about things that can be seen and observed.
9. Untestable hypotheses fall outside the realm of scientific inquiry.
Anyone can practice science, even if they don't have highly specialized scientific education and training.
Which of the above are true?
Experimentation and data collection provides solution to certain problems. It helps to solve an hypothesis formulated providing results and serve as guide for further experiments.
1. A scientific hypothesis is best described as an "educated guess." - False
2. Failure to disprove a hypothesis proves that the hypothesis is correct.- False
3. Scientific theories are never questioned.- False
4. A scientific theory is based on educated guesses and is not backed up by facts/data.-False
5. Scientists that contribute data that contradicts an established theory are not highly regarded in the scientific community.- False
7. Scientific facts are never questioned.-False
The True
6. In order for an investigation to be considered scientific, a controlled experiment must be used.- True
A control serves as a guide in an experiment as the experimental variable is tested with it to see the possible changes or outcome.
8. Science can only answer questions about things that can be seen and observed.- True
Science provides solutions to problem that have been identified, for which data are generated in respect to the problem identified and solutions are provided.
9. Untestable hypotheses fall outside the realm of scientific inquiry -True
An hypothesis should be testable, it is the problem statement that requires a solution.
If heart rates is 76 beats per minute how many times the heart beat in a day
Answer:
109,440 beats per day
Explanation:
75 times 60 (the amount of minutes in an hour) equals 4,560
456p times 24 (the amount of hours in a day) equals 109,440
PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!! Which of Earth's layers has the same chemical composition as the mesosphere? A. inner core B. lithosphere C. asthenosphere D. outer core
Answer:
C : The asthenosphere
Explanation:
The asthenosphere located next layer within the mantle . It has the same chemical composition of the mesosphere.
Answer:
asthenosphere
Explanation:
Common symptoms of iron deficiency and anemia include muscle weakness shortness of breath and lightheadedness why does Iron
deficiency cause of the symptoms
Answer: Because not enough oxygen is getting into the blood cells
Explanation:
Scenario: In the experiment shown, plant A received 50 mL of coke each day,
plant B received 50 mL of juice, and plant C received 50 mL of water. Every
day for one week, plant growth was measured.
What is the independent variable? *
Answer:
TYPE OF LIQUID SUBSTANCE RECEIVED
Explanation:
The independent variable in an experiment is the variable that the experimenter deliberately changes or manipulates in order to bring about a response in the dependent variable/measured variable.
In this experiment, the TYPE OF LIQUID was changed for each group of plant in order to see how it affects how the plants grew. Hence, the TYPE OF LIQUID is the independent variable while the dependent variable is the plant growth, which is dependent on the independent variable.
Humans autosomal cells have two copies each of 23 unique chromosomes. Match each cell division event and cell type according to the number of chromatids present.
23 Chromatids, 46 Chromatids, or 92 Chromatids
Spermatozoa
Ootid
Anaphase of mitosis
Oogonium prior to S phase
Answer:
Spermatozoa: 23 chromatids
Ootid: 23 chromatids
Anaphase of mitosis: 92 chromatids
Oogonium prior to S phase: 46 chromatids
Explanation:
1) Spermatozoa, also known as sperm cell is a haploid gamete (n) that results from the meiotic division of a dipoid reproductive cell. Since there are 23 pairs of chromosomes or 46 chromosomes in human somatic cells, there will be 23 chromosomes in the spermatozoa. Also, meiotic division occurs twice and separates sister chromatids in meiosis II. Hence, spermatozoa will contain 23 chromosomes (n) with 1 chromosome each i.e. 23 chromatids
2) Ootid is a haploid cell that arises from the second meiotic division of a secondary oocyte. A primary oocyte, with 46 chromosomes/92 chromatids, undergoes meiosis I to produce secondary oocyte with 23 chromosome/46 chromatids, which in turn undergoes meiosis II to produce ootid with 23 chromosomes/23 chromatids (each chromatid is an individual chromosome).
3) Mitosis is the cell division that produces two identical diploid (2n) daughter cells. Note that, 46 chromosomes get replicated to form 92 chromatids. In the anaphase stage of mitosis, sister chromatids get pulled apart to opposite poles but still remain in the cell as cytokinesis is yet to occur.
4) Oogonium is the diploid (2n) cell that gives rise to primary oocyte via mitosis. Prior to the S phase where chromosomes replication occurs, Oogonium cell will contain 46 chromosomes and 46 chromatids.
mechanism exloisive of tomato
carbon fibres in tennis racket
Answer:Improvements in the carbonisation of viscose fibers. While maximum theoretical carbon yield for the carbonisation of viscose fibres is 44%, in reality the carbon yield is just in the range of 20%. ...
ELG Carbon Fibre receives ISO standard. ...
Porous carbon fibers have more power.
Question 3: PH is a measure of the number of____ in a water-based fluid. a. Hydrogen atoms B.hydrogen ions C.hydrogen molecules D.hydrogen bonds Question 4: a _______ Is an attractive force between two Atoms (What is it?) Question 5: what property of water allows insects to walk on the surface? A period resistance to temperature change B. Expansion upon freezing C. Hi solubility D. Cohesion I’m sorry, these are all the points I have left. Please help me!
Answer:
Q3: B. Hydrogen ions
Q4: Intermolecular force
Q5: D. Cohesion
Which subgroup is the lowest?
kingdom
species
order
genus
Answer:
species is the lowest subgroup
Explanation:
Match the level of ecological organization
described by each of the statements below.
The birds, insects, plants, fungi, and other
organisms that reside in a nearby wetland.
A. Molecules
B. Organism
C. Population
D. Biological community
OA
B
O
C с
D) Biological community
Explanation:
Community, also known as a biological community, is a group of interacting organisms that share a shared habitat in biology.
What is Biological community?
A biological community is made up of things like a forest of trees and underbrush plants that is home to various animals and is anchored in bacterial and fungal-rich soil.
Each species in a community fills a certain ecological niche. A species' interactions with other individuals in the community, such as rivalry, predation, parasitism, and mutualism, are included in its niche.
The positions along the food chains that indicate which organisms in a community consume which other organisms are referred to as trophic levels.
Therefore, Community, also known as a biological community, is a group of interacting organisms that share a shared habitat in biology.
To learn more about community, refer to the link:
https://brainly.com/question/22558440
#SPJ2
Which of the following monomers vary based on the structure of their side chains?
Answer: Fatty acids. . Monosaccharides. . Nucleotides. . Amino acids. . What type of molecule is represented by the model below?. . -A molecule made up of four carbon rings with other atoms bonded to those rings-. . A.Fat. . B.Carbohydrate. . C.Steroid. . . D.Protein
Explanation: