What hormonal change occurs after fertilization that causes the endometrial lining to remain intact so that the fertilized egg can successfully implant in it?
A. The pituitary gland secretes oxytocin, which maintains the endometrial lining.
B. The pituitary gland secretes follicle stimulating hormone, which acts on the follicles and stimulates them to produce progesterone.
C.The hypothalamus secretes gonadotropin releasing hormone, which maintains the endometrial lining.
D.The developing embryo secretes human chorionic gonadotropin, which prevents the corpus luteum from disintegrating.
E. The developing embryo takes over the production of progesterone after the breakdown of the corpus luteum to maintain the endometrial lining.
Final answer:
D. The developing embryo secretes human chorionic gonadotropin, which prevents the corpus luteum from disintegrating. After fertilization, the blastocyst secretes human chorionic gonadotropin (hCG) which maintains the corpus luteum. This enables continuous secretion of progesterone to support the endometrium for successful implantation.
Explanation:
The hormonal change that occurs after fertilization to cause the endometrial lining to remain intact for successful implantation of the fertilized egg is the secretion of human chorionic gonadotropin (hCG) by the developing embryo. Once an oocyte is fertilized and becomes a zygote that later divides to become a blastocyst, the outer layer of the blastocyst starts producing hCG. This hormone acts similarly to luteinizing hormone (LH) and ensures that the corpus luteum does not disintegrate. The corpus luteum in turn continues secreting progesterone, maintaining the endometrium and supporting the new pregnancy.
What type of balance needs to be acquired first?
a) Dynamic balance
b) Turk stand
c) Tripod
d) Static balance
Answer:
Option C, Tripod
Explanation:
The first balance to be maintained in any survey is the tripod balance and then the dynamic balance is maintained . The dynamic forces due to air, earths movement, sun light and all other natural forces are maintained first to take accurate reading.
After the dynamic balance , the static balance is achieved to measure the quantity meant to be measured through this equipment setup.
Hence, option C is first.
how does information encoded in DNA get out of the nucleus to be used to make proteins
Which characteristic describes an organism of Kingdom Plantae? A) Movement occurs when its food supply runs low. B) Sunlight is used to make its own food. C) Water is not needed for survival. D) Oxygen is needed for breathing.
Answer:
B)sunlight is used to make its own food.
Explanation:
The fact that choanoflagellates and collar cells of sponges resemble each other supports the inference that ________. the fact that choanoflagellates and collar cells of sponges resemble each other supports the inference that ________.
The resemblance between choanoflagellates and sponges' collar cells (choanocytes) supports the inference that they share a common colonial and flagellated protist ancestor, marking an important point in the evolutionary pathway to multicellular life.
Explanation:The fact that choanoflagellates and collar cells of sponges, also known as choanocytes, resemble each other supports the inference that they evolved from a common ancestral organism. This organism likely resembled the modern colonial choanoflagellates. Both choanoflagellates and sponge's choanocytes bear a single flagellum, surrounded by a contractile collar composed of microvilli, which helps to filter and collect bacteria for food.
This structural similarity is crucial evidence in favor of evolutionary relationships among animals, or Metazoa, phyla. It suggests that Metazoa, including the sponges (Porifera), evolved from a colonial, flagellated protist ancestor. Notably, sponges represent the simplest animals, which resemble colonial, flagellated protists, indicating an early stage of multicellularity in the animal clade.
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1. Write the letters for each event in order from start to finish to show the correct sequence that demonstrates the process of natural selection.
a. Birds eat more light green beetles. Dark green beetles live longer and reproduce more.
b. A beetle is born with a variation it its color. It is dark green.
c. Over time, all beetles in the environment are dark green.
d. A population of beetles is light green. They stand out against dark green leaves.
Pls be right! Will mark brainiest is correct.
Beach erosion affects animals and plants in the Beach erosion affects animals and plants in the:
biosphere
cryosphere
atmosphere
hydrosphere
Answer:
Biosphere
Explanation:
because the beach is part of the biosphere and so are the animals
Three cells undergo meiosis. How many haploid cells are produced?
Answer:
A: 3Explanation:
cuz I got it right on the quiz
Lots of energy is required for development in r-selected species. True or False
The r-selected species are those species that have high reproductive rates. They live by exploiting ecological niches which are less-crowded. They produce more offsprings but most of them do not make it to the adulthood. They live on less food requirements due to their small body size and lack of adaptation capabilities. Examples are insects and rodents
Hence this statement is false.
Diffusion of a substance across a cell membrane is due to
Diffusion of a substance across a cell membrane is due to Small molecules pass through the lipid bilayer of a cell membrane.
What is the diffusion?Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration .
What does diffusion in biology?
Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration.
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On the 1
a.m. rounds, the nurse finds a patient awake and frustrated that she cannot go to sleep. the nurse administers an ordered hypnotic to help the patient sleep. two hours later, the nurse finds the patient out of bed, full of energy and cleaning her room. the nurse evaluates the patient's response to the hypnotic as
Now explain the importance of oxygen as relates to the atp tally.
Aerobic respiration produces 38 ATP from a six-carbon glucose molecule while anaerobic produces 2 ATP. Respiration that occurs in the mitochondria, to form ATP, is a redox reaction. Oxygen is the electron acceptor in the oxidative phosphorylation process. ATP synthase catalyzes this reaction.
Both anaerobic and aerobic breakdown of glucose molecules produces pyruvate and the generation of 2 ATPs in glycolysis process. However, in the presence of oxygen in aerobic respiration, the pyruvate is converted to Acetyl-CoA and enters the Krebs cycle and the oxidative phosphorylation process where a net of 36 ATP are produced. However, in anaerobic respiration, the pyruvate is converted to lactate and no further respiration occurs.
Which area of individual competence is most lacking in the following scenario?
A small group is trying to find a solution to an ongoing problem. One member presents a solution to the others. Afterwards, the other group members begin to analyze and critique his idea, but he quickly becomes defensive.
critical thinking
effective listening
assertion
productive conflict
Answer:
Productive conflict
Explanation:
Productive conflict refers to an exchange of ideas in which people exchange opinions that are sometimes opposite. However, they do so in a productive, respectful and positive way. In order to have productive conflict, the participants need to feel comfortable expressing and hearing dissenting opinions. This is the only way to ensure that conversation is open. In this case, productive conflict is impossible because the member becomes defensive when listening to criticism.
Plant cells and animal cells share many of the same structures, but each type of cell also has unique structures. in this activity, you will indicate which cell structures are found only in plant cells, only in animal cells, or in both plant and animal cells. drag each cell structure to the appropriate bin. if a structure is found in both plant cells and animal cells, drag it to the "both" bin. view available hint(s)
How does the duration of daylight affect temperature?
Answer:A.
Explanation:
DNA isolated from water samples collected in six different sites was prepared and anaylized by gel eletrophoresis for the presense of carp. the resulting gel is shown. lane 1 through 6 contain the DNA from each site. lane 7 and 8 represent the negative and positive controls. based on the bending patterns, how many sites tested positive for carp?
From the gel electrophoresis of the isolated DNA samples, we can state that lanes 1, 3, 5, and 8 tested positive for carp if lane 7 represents the negative control and lane 8 displays the positive control.
What is gel electrophoresis?A laboratory technique called gel electrophoresis is used to divide combinations of DNA, RNA, or proteins based on their molecular sizes. In gel electrophoresis, the molecules that need to be separated are forced through a gel that has tiny pores by an electrical field.
Each molecule will move through the gel at a variable speed upon the application of an electric charge due to differences in size and charge. This method uses a porous gel that separates larger molecules from smaller ones by acting as a molecular sieve.
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Gel electrophoresis is used to identify the presence of carp DNA by comparing sample lanes with the positive control. The DNA ladder aids in interpreting the results by providing known DNA fragment lengths for comparison. Without visual data, the actual number of positive sites cannot be determined.
To determine the presence of carp DNA in the samples from the six different sites, we look at the gel electrophoresis results. A positive control will display distinct bands that represent the DNA fragments we expect to see if carp DNA is present, while a negative control shows no such bands, indicating the absence of carp DNA. By comparing the DNA bands in lanes 1-6 with those in the positive control (lane 8), we can identify which sites have samples that tested positive for carp DNA.
Since the DNA ladder is used to determine the size of the DNA fragments by comparing them with known lengths, it plays a crucial role in interpreting the results. Sites that show similar banding patterns to the positive control indicate the presence of carp DNA, while those that do not, indicate a negative result.
It is important to note that the explanation provided assumes visualization of the gel, which is not attached to this question. Without the visualization of the electrophoresis gel, it is not possible to give a definitive answer to the number of sites that tested positive for carp DNA.
_______________ are a family of antianxiety drugs that includes diazepam (valium) and alprazolam (xanax).
a. beta blockers
b. benzodiazepines
c. sedatives
d. barbiturates
What term describes parts of organisms that have a similar structure but a different function?
A. Homologous Structures
B. Vestigial Structures
C. Embryological Structures
D. Analogous Structures
What ecological roles do liverworts mosses and hornworts play in the environment?
They are among the first colonizers of an environment. This way they break down rocks and make nutrients available for other plants. They help in retention of water in a habitat and also shelter many microorganisms. They also decompose organic matter hence play an important role in the cycling of nutrient in the environment.
Please select the word from the list that best fits the definition
mixture of sediments deposited by a glacier
Kettle
Moraine
Till
Plucking
Abrasion
Bedrock
Answer: Till
A glacier till can be defined as the deposits such as sediments, mud and boulders that are eroded and transported by a moving or retreating glacier. A till is characterized as a primary deposit. As a glacier melts, commonly in a continental glacier, a large amount of till is taken away and deposited as a outwash.
A seed that is dispersed to an area far away from the parent plant will always face less
A- competition of space
B- chance of self pollination
C- favorable conditions for germination
D- competition with the parent plants
Answer:
D- Competition with the parent plants.
Explanation:
The process of dispersal transports the seeds to farther distances from the parent plants and provides better chances of survival as there is no overcrowding of the space. However, it does not necessarily provide the favorable conditions to the dispersed seed as it purely depends upon the place it lands. It also increases the chances of self pollination as there may be fewer plants of same species.
A 4-year-old girl with a brain tumor diagnosed as an astrocytoma is admitted to the pediatric unit. the nurse performs a physical assessment while the child is lying in the supine position. during the assessment the child states that her head hurts and begins to cry. what does the nurse suspect as the most likely cause of the headache
The charge nurse is preparing for the arrival of clients to the emergency department (ed) after a mass casualty incident (mci). the hospital has an automatic tracking system that is implemented during mcis. which decision should the nurse use the system for during this mci
Answer:
The Nurse will follow the procedure of "Triage", in order to deal with the large number of patients in the casualty ward.
Triage- "This process of triage comes into play during MCI conditions as it says that the patients which needs immediate care and supply of health care must be given the priority as the medical center is facing difficulty during the overflow of patients in the hospital."Explanation:
MCI-( Mass Casualty Incident)"The process or the incident which if occurs will (use) exhaust all the facilities present at the hospital or any medical center in no time as the number of the patients are too much for the number of health care facilities available to treat the patients."
Now the mass casualty is characterized by a large number of patients present in the hospital or the medical center, as the total number of the medicines and health care facilities are just futile to handle the heavy traffic of patients.
The large bone marrow cells that manufacture platelets are
The spaces between cells in an animal's body is filled with ______ fluid what is the fluid called
The spaces between cells in an animal's body are filled with Interstitial Fluid, which is part of the extracellular fluid that surrounds and bathes the cells. It aids in providing nutrients to the cells and helps in waste removal.
Explanation:The spaces between cells in an animal's body are filled with Interstitial Fluid. This fluid, also known as tissue fluid or intercellular fluid, is a part of the extracellular fluid that bathes and surrounds the cells of multicellular animals.
Interestingly, an average person has about 11 liters of interstitial fluid. This fluid plays a crucial role in providing the cells of the body with nutrients and a means of waste removal. The interstitial fluid, coupled with plasma and transcellular fluid, constitutes the extracellular fluid in the body.
Additionally, it's worth noting that plasma, a major component in blood, communicates freely with interstitial fluid through pores and intercellular clefts in capillary endothelium. This process allows for the effective exchange of materials between cells and the plasma.
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Scientists promote the teaching of evolutionary theory, in part to raise new scientists to help use evolutionary theory. how are scientists using evolutionary theory in efforts that can help people?
a.there is no way that knowledge of evolutionary theory can possibly help anyone.
b.evolutionary theory is being used to guide thinking in computer science, but in no other way.
c.evolutionary theory is being used to understand, and help fight, the emergence of antibiotic-resistant diseases and other new diseases, and even to guide thinking in computer science.
The answer is C. Studying evolutionary patterns can assist epidemiologist to anticipate the evolution of diseases and also understand antibiotic resistance. Computer scientists are also using the understanding of natural evolution to develop evolutionary algorithms and genetic algorithms in the development of artificial intelligence.
Which of the following is an example of an internal combustion engine? cannon steam boat steam locomotive catapult
Answer:
The Cannon
Explanation:
Remember that there is an explosion INSIDE of the cannon, which propels projectiles, typically cannonballs.
An example of an internal combustion engine from the options is The Cannon
An internal combustion engine is type of engine whereby the ignition and combustion of the fuel used by the engine occurs inside the engine. internal combustion engines are widely used types of engine consisting of a cylinder (fixed ) and piston.
Steam engines make use of water as a source of fuel and not fossil fuels therefore they are not internal combustion engine
Hence from the options given above an example of an internal combustion engine is the Cannon engine.
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In which direction does the dna polymerase move on the lagging strand during polymerization events?
DNA polymerase is one of the key enzymes in DNA replication and it is responsible for synthesis of DNA. They function by adding nucleotide one by one to the growing DNA by incorporating only those that are complementary to the template. Hence, DNA polymerase synthesized in 5′ → 3′ polymerization of lagging strand which leads to overall growth in the 3′ → 5′ direction.
Which function does a phytoplankton have in ocean ecosystems?
A.
producer
B.
consumer
C.
scavenger
D.
decomposer
Phytoplankton is one of the best examples of A. producers of ocean ecosystem.
Explanation:Since the seas on Earth are so tremendous, the atmosphere shifts drastically. Warm tropical waters along the bank of the equator feel about like shower water. These spots are home to unimaginable biodiversity. However, the solidifying waters of the Arctic have their very own biological system as well, regardless of the temperature. Indeed, even the bone-squashing profundities of the remote ocean are home to stunning kinds of life.
Coral reefs live in the shallow, warm waters close to the bank of the equator. The producers in all seas, including the coral reefs, are fundamentally algae and phytoplankton, minuscule photosynthetic living beings that produce nourishment from water and daylight.
Can you identify which characteristics are found in which phyla?'
There are different characteristics for differentiating the members of different phyla in kingdom animalia.
The phylum is the level of organization just below the kingdom. In Animalia there are nine major phyla.
The first is porifera and it has a cellular level of organization. It is acoelomate and does not have symmetry.
After that the Coelenterata has tissue level of organization, radial symmetry and no coelom. They are essentially sessile, and have polyp or medusa body forms.
Ctenophora called comb jellies are radially symmetrical with tissue level of organization, no coelom and have external plates of ciliated plates called comb plates.
Bilateral symmetry is observed from platyhelminthes, they lack coelom and from this phyla organ & organ system level of organization is observed. Aschelminthes are pseudocoelomates and have a false coelom. From annelida onwards coelom is present. Annelids have segmentations (internal and external and are called roundworms. Arthropods have jointed legs and outer exoskeleton of cuticle. Molluscs have a visceral hump and a muscular foot and often an exoskeleton of calcium and radula for feeding.
Echinodermates has radial symmetry and a water vascular system for locomotion, feeding, movement etc.
Hemichordates are worm-like with, proboscis collar and a trunk.
Cordata members have a notochord and a dorsal hollow nerve cord. And may have gill slits with limbs or fins
Based on the stages of development and the characteristics present the phyla of the animalia are described. Traits like level of organization, body symmetry, the development of the notochord etc are used for the classification.
Thus the traits of major phyla are described above.
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