The graph shows the changing levels of hormones during menstruation and ovulation. What is the general trend for hormones after ovulation as an individual approaches menstruation?
A graph shows the changing levels of hormones during menstruation and ovulation. As an individual approaches menstruation, most of the hormone levels decrease.
Hormone levels generally decrease.
Hormone levels generally rise.
Hormone levels remain the same.
Hormone levels go in two different directions.
Answers
Answer:
Hormone levels generally decrease.
Explanation:
The graph showed that hormone levels after ovulation generally decrease.
The menstrual cycle of women generally have 3 phases which include:
The follicular phaseThe ovulatory phaseThe luteal phaseThe follicular phase is characterized by low levels of oestrogen and progesterone and a slightly high level of follicle stimulating hormone which ensures that follicles within the ovary develop.
The ovulatory phase is characterized by a surge in the luitenizing hormone (which stimulates the release of eggs) and follicle stimulating hormone with a decrease in the level of oestrogen and a gradual increase in the level of progesterone.
The luteal phase is characterized by a general decrease in the levels of luitenizing hormone and follicle stimulating hormone while oestrogen level may remain high.
Answer:
Yes! The correct answer is A.) Hormone levels generally decrease.
Explanation:
I did the Unit Test and i got it correct.
Related Questions
Give three examples of reproductive barriers AND Explain how these barriers could lead to
speciation over a long period of time.
Answers
Answer:
temporal isolation which causes the two populations of one species are isolated this way, they no longer reproduce with each other due to differences in mating times, ecological isolation which implies reproductive isolation of populations inhabiting separate niches as a result of divergent selection of ecologically influenced characters, and behavioral isolation which occurs when populations of the same species begin to develop different behaviors that are not recognized or preferred by members in another population.
Answer:
temporal isolation which causes the two populations of one species are isolated this way, they no longer reproduce with each other due to differences in mating times, ecological isolation which implies reproductive isolation of populations inhabiting separate niches as a result of divergent selection of ecologically influenced characters, and behavioral isolation which occurs when populations of the same species begin to develop different behaviors that are not recognized or preferred by members in another population.
Explanation:
Felicity draws this diagram on the board to explain one of Mendel's experiments for her classmates. She says that it shows the cross between two first-generation offspring. What is the error in her diagram?
Answers
OPTIONS:
A. All peas should be green.
B. All peas should be yellow-green.
C. One pea should be green and three peas should be yellow.
D. One pea should be yellow and three peas should be green.
Answer:
C. One pea should be green and three peas should be yellow.
Explanation:
In Mendel’s experiment, the allele for yellow seed color iss dominant, while the green allele is recessive. His experiment involves crossing two true breeding pea plants that are homozygous for various selected traits. For example, for seed color, each of the parent plants are homozygous for each of the seed color. i.e. one is homozygous dominant for yellow seed (YY), while the other is homozygous recessive for green color (yy).
The first filial generation gotten from the cross between both parents has all the offspring of the F1 generation having yellow seed color. They were all heterozygous (Yy), since yellow color is dominant over green color, all F1 individuals appeared similar to their parents and were all had yellow seeds.
When two first-generation offspring were crossed together, the ratio of individuals having Yellow seed color to green seed color was 3:1, meaning a cross between two F1 generation should give us 1 pea plant with green seed color and 3 peas should have yellow.
Answer:
c
Explanation:
Is the distribution of organisms of a species constant with time?
Answers
Answer:
The distribution of organisms on the earth's surface is ultimately due to evolutionary change: Organisms or Species do not stay the same over time but are in a constant state of change as individuals. They are best able to live and reproduce within certain environments.
Explanation:
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The distribution of organisms of a species is constant with respect to time on the surface of the earth.
What is Species?A biological species is a group of organisms that can reproduce with one another in nature and produce fertile offspring.
Organisms of a particular species evolve with respect to time. A specific organism or species does not stay the same over a period of time. But they acquired constant changes over time. They are favored by the environment to produce fertile offspring.
Therefore, the distribution of organisms of a species is constant with respect to time on the surface of the earth.
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What conditions must scientists provide for viruses to multiply
Answers
Answer:
Viruses can only reproduce after they have infected host cells. Viruses are simply packaged sets of genes that move from one host cell to another. Unlike bacteria and other living parasites, a virus has no structures to maintain—no membranes or organelles needing ATP, oxygen, or glucose.
What is responsible for the apparent movement of the Sun across the sky throughout the day?
Answers
Explain how a long-term environmental change can lead to the development of a new species.
Answers
Answer:
When a long-term environmental change occurs, certain individuals in a population will be better adapted for the new environment than others. ... Over many generations, these favorable adaptations build up in a population. This may lead to speciation, which is the development of a new species.
Answer:
it is possible that when long-term enviornment changes it can create new diferences in the worlds for example, with tsunamis or hurican it might create new DNA with all the damage did.
Explanation:
I am sorry if I am wrong
please tell me if i am
In people sickle cell disease is expressed codominantly. When an individual is heterozygous they have both normal and sickled cells, but has only sickled cells when they have only recessive alleles. What is the phenotypic ratio of offspring with two heterozygous parents?
A. 1 all round cells : 1 mixed round and sickled cells : 0 all sickled cells
B. 1 all round cells : 2 mixed round and sickled cells : 1 all sickled cells
C. 1 all round cells : 0 mixed round and sickled cells : 1 all sickled cells
D. 3 all round cells : 0 mixed round and sickled cells : 1 all sickled cells
Answers
Answer:
B.
Explanation:
When you solve this answer using a punnet square, you start with Ss and Ss.
1 all round cells : 2 mixed round and sickled cells : 1 all sickled cells (B) is the correct option.
What is sickle cell disease?Sickle cell disease is an inherited blood disorder that affects the production of hemoglobin, a protein in red blood cells that carries oxygen throughout the body. It causes red blood cells to become misshapen and break down, leading to various health problems.
The possible genotypes of the offspring are SS, Ss, and ss, with respective probabilities of 1/4, 1/2, and 1/4. The corresponding phenotypes are all round cells, mixed round and sickled cells, and all sickled cells, respectively.
Since sickle cell disease is codominant, the phenotype of the heterozygous individuals is a mixture of the phenotypes of the homozygous individuals. Thus, the phenotypic ratio of the offspring is 1 all round cells : 2 mixed round and sickled cells : 1 all sickled cells.
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Monohybrid Mice, i need help
Answers
Answer/Explanation:
See attached images showing the crosses on a Punnett square as well as the genotype and phenotypes of each cross.I. Cross between a female Gg with a male gg (GG X gg):
1. Probability of getting gray offspring (Gg) = 2/4 (¼+ ¼) = ½
2. Probability of getting albino offspring (gg) = 2/4 (¼+ ¼) = ½
3. There are 2 possible genotypes among the offspring, which are Gg and gg.
4. There are 2 possible phenotypes among the offspring, which are gray and albino coat color.
5. Probability of getting heterozygous offspring (i.e. Gg) = 2/4 = ½
6. Probability of getting homozygous offspring (i.e. GG or gg) = Probability of getting GG + Probability of getting gg = ½ + 0 = ½
7. The color of the female that was crossed (i.e. Gg), is gray color. The allele for gray coat color (G) is dominant over the allele for albino coat color (g).
8. The color of the male (gg) that was crossed is albino. The recessive allele (g) for albino coat color, in its homozygous state would express itself in the absence of the dominant G allele for gray color.
II. Cross between homozygous gray female with a heterozygous male (GG X Gg):
1. Probability of getting gray offspring (GG or Gg) = 4/4 (i.e. ¼+ ¼ + ¼ + ¼ ) = 1
2. Probability of getting albino offspring (gg) = 0
3. There are only 2 possible genotypes among the offspring, which are GG and Gg.
4. There is only 1 possible phenotype among the offspring, which is gray coat color.
5. Probability of getting heterozygous offspring (i.e. Gg) = 2/4 (i.e. ¼+ ¼ ) = ½
6. Probability of getting homozygous offspring (i.e. GG or gg) = Probability of getting GG + Probability of getting gg = 0 + ½ = ½
7. The genotype of the female that was crossed is GG, given that the female is homozygous gray.
8. The male crossed is a heterozygous male (Gg), the male is gray.
III. Cross between a gray female, whose father was albino, with a heterozygous male (Gg X Gg):
We can make a good guess of the genotype of the female, given that gray color is dominant over albino, and the father was albino (gg). The father can only contribute sperm having only (g) allele, while the mother must contribute only a (G) allele to give a gray offspring. The gray female is definitely heterogyzous female i.e Gg
1. Probability of getting gray offspring (Gg or GG) = ¾ (½ + ¼)
2. Probability of getting albino offspring (gg) = ¼
3. There are 3 possible genotypes among the offspring, which are GG, Gg, and gg.
4. There are 2 possible phenotypes among the offspring, which are gray and albino coat color.
5. Probability of getting heterozygous offspring (i.e. Gg) = 2/4 = ½
6. Probability of getting homozygous offspring (i.e. GG or gg) = Probability of getting GG + Probability of getting gg = ¼ + ¼ = ½
7. The genotype of the female is Gg. We know this because we were given that it is gray in color, and gray is dominant over albino. Also, given that the father was albino (gg), a (g) allele can only be contributed by the father to combine with the dominant (G) allele to give us a female that has heterozygous gray coat color (Gg).
8. The genotype of the male is Gg. We know this because we were given that it was a heterozygous male. If an organism is heterozygous, it has different alleles controlling that trait.
IV. Cross between an albino female, whose father was gray, with a gray male, whose mother was albino (gg X Gg):
The albino female’s genotype is gg, because the g allele is recessive. The gray male’s genotype, whose mother was albino (gg) is definitely Gg, because gray is dominant, and to get a gray offspring, a G allele from the mother of the male must combine with the g allele that the albino father can only contribute i.e. Gg or GG from mother X gg from father = Gg (the gray male offspring).
1. Probability of getting gray offspring = ¼ + ¼ = ½
2. Probability of getting albino offspring (gg) = ¼ + ¼ = ½
3. There are 2 possible genotypes among the offspring, which are Gg, and gg.
4. There are 2 possible phenotypes among the offspring, which are gray and albino coat color.
5. Probability of getting heterozygous offspring (i.e. Gg) = ¼ + ¼ = ½
6. Probability of getting homozygous offspring (i.e. gg or GG) = ½ + 0 = ½
7. The genotype of the gray father of the albino female (gg) is Gg. Of the two possible genotypes of the gray father (i.e. GG or Gg), Gg is the most likely genotype to contribute the recessive g allele that would pair up with another g allele from the mother to give an albino female (gg), i.e. Gg (father) X Gg (Mother) or Gg (Father) X gg (Mother) = gg (albino female)
A monohybrid cross is a genetic cross that considers only one trait. Results from these crosses led to the concept of dominant and recessive traits and Mendel's Law of Segregation. Punnett squares visually present the likely outcomes of these crosses.
Explanation:A monohybrid cross involves the mating of individuals who have two different alleles for a single trait. For example, Mendel ran several monohybrid crosses using pea plants. The trait being examined was the color of the pea—the parent plants had either green or yellow peas. After breeding a purebred yellow pea plant with a purebred green pea plant, all offspring were yellow, showing that yellow is the dominant trait and green the recessive.
Monohybrid crosses are useful tools in predicting the outcome of genetic crosses because they follow Mendel's Law of Segregation. According to this law, during the formation of reproductive cells, pairs of genetic traits separate, and offspring receive one factor from each parent.
A Punnett square is a tool that provides a visual representation of the possible combinations of genetic traits the offspring could inherit. For monohybrid crosses, a Punnett square will give a 3:1 ratio, representing the likelihood of the offspring expressing the dominant trait over the recessive trait, given that both parents are heterozygous.
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What do Virginia watershed programs do? Check all that apply.
build dams
produce water filters
remove estuaries
protect wildlife
assist with flood reduction
Answers
Answer:
a,d,e
Explanation:
Answer:
a, d, e
Explanation:
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How are detritivores different from decomposers?
Need answer right now
Answers
The Milky Way is a cloud of space dust and debris from planets and stars
Answers
Answer:
This is true to an extent. The Milky Way is a galaxy. A galaxy contains stars, planets, space dust, and some other things. A galaxy is not necessarily, completely made from a cloud of space dust and debris. There are other things that make a galaxy a galaxy.
Explanation:
The fact that whales, humans, and cats all have the same bones in the same order, but they matured differently in later embryological development, is an example of:
Answers
Answer:
Homologous structure
Explanation:
Homologous structures refers to organs or bones that have similar anatomical features found in different animals that are suggested to have the same common ancestor and serves as an evidence of evolution.
Whakes, humans and cats have similar bones in the same order but different in function.
Answer and Explanation:
The fact that whales, humans, and cats all have the same bones in the same order, but they matured differently in later embryological development, is an example of homologous characters or homologous structures.
Homologous characters have the same fundamental structures. They also share the same relations with adjacent structures, and they have the same embryological development.
These structures might show variations between organisms exhibiting them, according to their function and to the environment in which the organism lives.
These homologous characters are common in organisms related and that share a common ancestor.
Explain why the tongue can be considered the muscle with the greatest strength endurance
Answers
Answer:
Tongue can be considered as the strongest muscle of the body as it has the greatest strength endurance as it is not affected by its working.
It keeps on performing its function whole day and night without a single sign of fatigue.
In helps in the production of saliva for the breakdown of food into smaller molecules for digestion.
So, it can considered as the muscle having greatest muscle endurance.
Answer:
It is always working.
It even works while the person is sleeping to push saliva down the throat.
Explanation:
Got it correct
The first eight as seen here are the ____________ vertebrate and send messages to the back of the head, neck, shoulders, arms, hands and diaphragm.
Answers
Answer:
Spinal nerves branch off from the spinal cord to innervate the rest of the body. These complex networks of nerves enable the brain to receive sensory inputs from the skin and to send motor controls for muscle movements. In the cervical spine, there are eight pairs of spinal nerves labeled C1 to C8, which innervate the neck, shoulder, arm, hand, and more.
Which of these is a way climate change positively affects organisms?
A. Reduces current food supply
B. Provides new food sources
C. Reduces habitat area
D. Increases ocean acidity
Answers
Climate change can have a positive impact by providing new food sources for some species, enabling them to expand their range into areas that were previously too cold. Therefore, the correct option is B
The question being asked is which of these is a way climate change positively affects organisms. The correct answer is B. Provides new food sources. While climate change can have many harmful effects on the environment and organisms, one of the potential positive impacts is that it can create new niches and opportunities for certain species. For example, as the climate warms, some species may expand their range into areas that were previously too cold for them and find new sources of food.
Maggie is a member of her school’s environmental club and is interested in recycling. She asks the question, “How does exposure to the environment affect recyclable plastics?”
What best describes why and how Maggie should change her question to make it a better scientific question?
A)The answer to the question leads to a testable hypothesis, so the question should be changed to prevent testing.
B)The question involves giving an opinion about recycling, so it should be changed to rely only on facts.
C)The focus of the question is too broad, so it should be narrowed to a single environmental factor.
D)The results are too uncertain, so the question should be changed to one that has a known outcome.
Answers
Answer:
c
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Answer:
The guy above me is right
Explanation:
If the somatic cells of a human contain 46 chromosomes, then after meiosis new sex cells would contain _____ chromosome
Answers
Answer: 23 chromosomes
Observing animal tracks is an example of
observation, which is used to estimate population size.
A. mark and recapture
B. indirect
C. sampling
D. direct
Answers
Answer:
The answer is B. Indirect!
Explanation:
Anyone help me please ? Science ~
Answers
Answer:
the Eukarya domain
Which of the following is a component of biodiversity?
A the variety of organism species in an area:
B the genetic variation within a community of species
C the variety of different communities in an area
D All of the above are components of biodiversity.
Answers
Answer: D All of the above are components of biodiversity.
Explanation:
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Which of the following DOES NOT describe the structure of DNA?
1.Double helix
2.Carbohydrate monomer
3.Contains A-T, C-G base pairs
4.Sugar-phosphate backbone
Answers
Answer:
2.Carbohydrate monomer
Explanation:
Monosaccharides are the monomers that make up carbohydrates. Glucose is an example of a monosaccharide. Glycerol and fatty acids are the monomers that make up lipids. Nucleotides are the monomers that make up nucleic acids
10. The Florida panther is a type of mountain lion. About
a hundred years ago, Florida panthers scattered and
mated with other subspecies of mountain lions in nearby
populations.
a. Explain how the gene flow in this population would be
affected by the introduction of the Florida Panthers.
b. Would genetic variation increase or decrease in the
mountain lion population?
Answers
Answer:
a) Inbreeding
b) Decreased
Explanation:
Florida panther is considered an endangered species that is found in very few numbers in the environment.
In the given question,
a) The Florida panther scattered in the mountains which could affect the flow of the genes (migration). When it mated with the other sub-species, it could have led to the inbreeding.
b) Since the lion scattered in the mountains, the gene flow could have occurred and this could have decreased the genetic variation in the population of the Panthers.
Answer:
a) Gene flow in a genetic population is defined as the transfer of genetic variation from one population to another.
Gene flow is considered as one of the impotant mechanism of genetic diversity in a population. Migrant affects the genetic diverisity in a population by modifying the allele frequencies.
When florida Panthers introduced with subspecies of mountain lions it increases the genetic flow in the population of mountain lion as the florida panther were carrying a particular variant of a gene.
B) Due to high genetic flow the genetic vriation in the population will decrease between the two groups and results in increasing homogeneity. High rate of gene flow lead to a combination of the two gene pools that reduces the genetic variation. Hence, genetic variation will decrease in the mountain lion population.
Which of the following strategies would least likely help conserve the environment?
A reducing pesticide use
B developing alternative energy sources
C protecting habitats
D increasing pesticide use
Answers
Answer: i guess it is the option (c) because Pesticides are poisonous and, unfortunately, they can harm more than just the “pests” at which they are targeted. They are toxic, and exposure to pesticides can cause a number of health effects. They are linked to a range of serious illnesses and diseases from respiratory problems to cancer.
Explanation:
1. Why do you think scientists struggle to determine the closest relatives of giant pandas?
2. Based on your knowledge of bears and raccoons, which do you think the giant panda is most closely related to? Why?
Answers
Answer:
1.There is a struggle between determining the closely related species of giant pandas because there is no as such ancestral evidence for the panda family.
Many study and research have shown that they can be either close to bears or raccoons but in spite of several sequencing there is no conclusion yet to closeness of pandas.
Even the red panda and giant pandas are compared, the only similarity is that they eat bamboos but they are not closely related. The red pandas are closely relates to ferrets and giant pandas to polar bear.
2. The giant pandas are more closely related to bears as compared to raccoons. The study have shown this they share more recent ancestors to bears.
Explain why Agriculture is increasingly harming the environment?
Answers
Answer: Agriculture is increasingly harming the environment for multiple reasons. One being deforestation. Deforestation reduces ecological services it provides humans produces large amounts of Carbon Dioxide which adds to greenhouse gases -> which add to our current problem with climate change. Additionally, the pesticides and fertilizers agriculture uses can be harmful to the nearby ecosystems as it can end up in surrounding rivers which causes it to cycle back.
Why is the cell cycle important in multicellular organisms?
Answers
THINK OF IT THIS WAY IF WE HAVE NO CELLS IN USE WE DIE we need cells to live
Which things are abiotic factors that are also basic needs for the Kingdom Plantae? Check all that apply.
U a water
b bacteria
Oc sunlight
d pollen
e fungi
Answers
Answer:
A and C
Explanation:
cardiovascular function of system
Answers
Answer:
Transportation of nutrients, gases and waste products
Protection from infection and blood loss
Maintenance of constant body temperature (thermoregulation)
Maintaining fluid balance within the body
Explanation:
What are the three things that blood is responsible for transporting through the body.
Nerve impulses
wastes such as CO2
French fries
oxygen
nutrients
DNA
Answers
Answer:
look it up
Explanation:
got it right
Answer:
oxygen ,nutrients and wastes eg co2
Which statement provides an example of how social hierarchy might influence a population?
Soldier termites defend the colony from predators.
Prairie dogs use a high-pitched bark to communicate.
Mistletoe sends roots into tree branches to take in nutrients.
Poison tree frogs have bright colors signifying that they are toxic.
Answers
Answer:
A. Soldier termites defend the colony from predators.
Explanation:
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An example of how a social hierarchy can influence a population is the role of soldier termites in a termite colony, where their function of defending the colony greatly influences its survival.
Explanation:A social hierarchy often dictates the roles, responsibilities, and interactions within a population, influencing its overall structure and functioning. An illustration of this could be 'Soldier termites defend the colony from predators.' The social hierarchy of termites is divided into distinct classes or 'castes', each with different functions. For instance, the soldier termites have the primary responsibility of protecting the colony from potential threats. Their existence and functionality greatly influence the population's survival due to their crucial defense role.
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