Answer:
acquisition
Explanation:
Flatworms are worms that appeared on Earth probably about 600 million years ago. They live mainly in aquatic environments such as oceans, rivers and lakes; They are also found in humid terrestrial environments. Some live free, others parasitize diverse animals, especially vertebrates.
These worms are extremely sensitive to certain light intensities, writhing quickly when an incident light causes electric shocks on their bodies. The moment that flatworms contort the body in the face of a light with gradually increased intensity is called acquisition.
In classical conditioning, the acquisition stage is where a flatworm learns to contract its body to light alone after the light has been repeatedly paired with an electric shock.
Explanation:The flatworm response of contracting its body to light upon repeated pairing with an electric shock is a classical example of associative learning, specifically known as classical conditioning. During this process, the flatworm's contraction reflex is established and strengthened until the light alone, without the accompanying shock, is sufficient to elicit the contraction behavior. This stage is known as the acquisition stage, where the flatworm consistently pairs the light stimulus with the impending shock until the light becomes a conditioned stimulus capable of eliciting the contraction response on its own.
When the respiratory diaphragm contracts, it flattens, lowering the floor of the thoracic cavity. At the same time, the intercostal muscles pull the ribs up and out. The active forces of the muscle groups cause a(n) __________ (increase/decrease) in thoracic volume. Given the relationship between pressure and volume, this would cause pressure within the lungs to __________ (increase/decrease)
Answer:
1. Increase
2. Decrease
Explanation:
During inspiration, diaphragm contracts and lowers down. There is a simultaneous contraction of external intercostal muscles and movement of rib-cage upward and outward. All these events lead to an increase in the volume of the thoracic cavity. Increase in volume of the thoracic cavity results in expansion of lungs and lowering down the air pressure within alveoli of lungs.
The contraction of the respiratory diaphragm and intercostal muscles during inhalation increases thoracic volume and decreases pressure in the lungs, causing air to enter.
Explanation:When the respiratory diaphragm contracts, it flattens, leading to an increase in thoracic volume. Concurrently, the intercostal muscles pull the ribs up and out. Owing to Boyle's Law, which posits an inverse relationship between pressure and volume, this increase in thoracic volume leads to a decrease in pressure within the lungs as compared to the external atmosphere. As a result, air is drawn into the lungs.
Most recommended levels of intake for vitamins and minerals do not change with aging. An exception to this is the recommended dietary allowances for vitamin D, which are higher in adults over age 50 years. What causes the body’s need for vitamin D to increase over the age of 50 years?
Answer: There are many factors due to which the dietary allowances of Vitamin D changes with age.
Explanation:
Vitamin D deficiency is mainly associated with the muscle weakness which becomes weak at the age of more than 50 years. There are many risk factors associated with the person of older age group.
Decreased dietary intake, very low sunlight expose,impaired intestinal absorption, reduces skin thickness, impaired hydroxylation in the kidney and liver.
Due to the above reasons the older age groups are advised to increase the dietary allowances of vitamin D.
Which of the following factors could cause the largest increase in the effective population size of a species?
A) an increased number of males
B) an increase in the total population size
C) an increase in the number of breeding males and females
D) an increased number of females
Answer:
an increase in the number of breeding males and females- C)
The factors could cause the largest increase in the effective population size of a species is an increase in the number of breeding males and females. Hence option C is correct.
What is population?Population is defined as the quantity or population of people living somewhere who are a particular social, cultural, economical, ethnic, or racial category. It comprises of a related collection of species that live in a specific area and have the ability to interbreed. The population should be in balance with available resources and means as one of the key aspects in maintaining a healthy ecosystem.
The sex ratio of the breeding animals is one factor that can affect the effective population number. Using data from a population census or pedigree database regarding the number of males (Nm) and females (Nf) who give birth to children in a generation, we may estimate Ne.
Thus, the factors could cause the largest increase in the effective population size of a species is an increase in the number of breeding males and females. Hence option C is correct.
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What is the function of the lymph nodes?
filter and purify interstitial liquid returning to the blood
filter fluids entering each cell
absorb excess fluid from blood
regulate the consistency of fluid in plasma
Answer:
Lymph nodes absorb excess fluid from blood
Explanation:
Lymph nodes are part of lymphatic system. Lymph nodes perform two main function; one is to enhance the immunity by producing immune cells, and other is to absorb excess fluid that is continuously leaking from blood vessels. this fluid includes water, protein and other substances too. Lymph nodes are rich source of immune cells too.
Answer:
filter and purify interstitial fluids returning to the blood
What is the correct order of evolution of the major types of pants? A. Non vascular, Gymnosperm, Vascular seedless, Angiosperm B. Vascular seedless, Non vascular, Angiosperm, Gymnosperm C. Non vascular, Vascular seedless, Gymnosperm, Angiosperm D. Angiosperm, Gymnosperm, Vascular seedless, Non vascular
ANSWER:
The correct order of evolution is C- Non Vascular, Vascular seedless, Gymnosperms, Angiosperms.
EXPLANATION:
The first plants to evolve were the non-vascular bryophytes like fungi and algae. The next to evolve were vascular plants that supported a vascular tissue system but lacked seeds. Gymnosperms are vascular plants that have seeds. The seeds produced in the gymnosperms could undergo fertilization easily as the wind acted as pollen carrier. The next to evolve were angiosperms or flowering plants. Flowering plants have highly modified shoots that carry male as well as female gametes.The Order of Evolution of Major Types of Plants:C. Nonvascular, Vascular Seedless, Gymnosperm, Angiosperm. Therefore , C. Nonvascular, Vascular Seedless, Gymnosperm, Angiosperm is correct .
Nonvascular Plants:
Nonvascular plants, like mosses, are considered among the earliest plants. They lack specialized tissues for water transport.
Vascular Seedless Plants:
Vascular seedless plants, such as ferns, evolved later and have specialized vascular tissues for water and nutrient transport. They reproduce through spores.
Gymnosperms:
Gymnosperms, like conifers, appeared later in plant evolution. They have seeds but no flowers. Seeds are exposed, typically on cones.
Angiosperms:
Angiosperms, or flowering plants, represent the most recent evolutionary development. They produce seeds enclosed within fruits and have specialized reproductive structures, including flowers.
The correct order reflects the progression from simpler, nonvascular plants to more complex vascular plants and finally to the advanced seed-bearing structures of gymnosperms and angiosperms.
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average acceleration is the slope of velocity vs. time graph
True or false
Answer:
True
Explanation:
The slope of a velocity- time graph is obtained by dividing the average change in velocity over time.
slope=Δv/Δt
This gives the derivative of velocity with respect to time which is numerically equal to the acceleration.
Δv/Δt=acceleration.
Answer:
true
Explanation:
You are a forensic scientist. For today, your supervisor tells you to perform a confirmatory test for semen on Item D. You recover Item D from the evidence locker. Item D is a vaginal swab from a sexual assault kit. An AP Spot Test has already been performed on the swab, with a positive result. You cut off a small portion of the swab. You agitate the swab in a small tube with water. You smear this water onto a microscope slide and stain the slide with red dye and green dye. You look for sperm cells under a microscope, but do not observe any sperm cells. Explain.
Answer:
Ok
Explanation:
Which is appropriate for initial rate method experiments to analyze an enzyme-catalyzed reaction?
Both enzyme and substrate concentrations are constant.
The temperature is varied and the rate is measured.
Enzyme concentration is constant and the rate is measured at different substrate concentrations.
Substrate concentration is constant and the rate is measured at different concentrations of enzyme.
The substrate and enzyme concentrations are varied inversely with respect to one another and the rate is measured.
Answer:
Enzyme concentration is constant and the rate is measured at different substrate concentrations.
Explanation:
The initial rate method experiments are carried out to study the effect of substrate concentration on the rate of an enzyme-catalyzed reaction.
Since the concentration of the substrate keeps on changing during the experiment, the initial rate of reaction is measured for varying substrate concentrations while the enzyme concentration is kept constant.
Answer:
B
Explanation:
First we will find the rate of a reaction at low concentrations followed by high concentrations by keeping the enzyme concentration constant.
How could the botanist best determine whether the genotype of the green-pod plant is homozygous or heterozygous?
Answer:
With a test cross.
Explanation:
To determine whether the genotype of a plant is homozygous or heterozygous it can be applied a test cross, which consists in crossing an individual of an unknown genotype with an individual of a known genotype.
The botanist could determine the genotype of the green-pod plant by performing a test cross with a homozygous recessive plant. If all the offspring have green pods, it is homozygous. If some have yellow pods, it is heterozygous.
Explanation:The botanist could best determine whether the genotype of the green-pod plant is homozygous or heterozygous by performing a test cross. To do this, the botanist would cross the green-pod plant with a homozygous recessive yellow-pod plant. If all the offspring have green pods, then the green-pod plant is homozygous. However, if some of the offspring have yellow pods, then the green-pod plant is heterozygous.
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How do zymogens involved in blood clotting?
Answer: acts by sequential proteolytic activation, via plasma proteases, resulting in the formation of thrombin.
Explanation:
Hemostasis is a physiological process involved with blood flow and bleeding control in the face of vascular injury, initiating the tissue repair process. The coagulation system is characterized by the action of plasma proteases (coagulation factors) in the form of zymogens (pro-enzymes), by which, when activated, give rise to the active proteases (enzymes) that initiate a cascade reaction, leading to the conversion of plasma fibrinogen in fibrin polymers, forming the clot. The fibrin network stabilizes the platelet lid, accumulating red blood cells and leukocytes, giving rise to the thrombus.
Can i put triple antibiotic ointment on my dog
Answer:
sure????
Explanation:
While it can be safe to use triple antibiotic ointment on dogs for minor cuts and abrasions, it's recommended to consult with a veterinarian first as there may be allergic reactions or better-suited options.
Explanation:The use of triple antibiotic ointment on dogs can be safe, but it is best to consult with a veterinarian first. Triple antibiotic ointment is designed for humans, and although it can help with minor cuts and abrasions in dogs, it isn't tailored to their unique physiology.
Some dogs may also have allergic reactions to the ointment. There are vet-approved versions of antibiotic ointments available specifically for dogs which may be a better option. Remember, self-treatment of a pet is not advisable; always consult with a professional.
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What is speciation?
O
A. The radiation of adaptations through a species
B. The flow of genetic information between organisms
O
C. The isolation of two parts of a population
O
D. The formation of two or more species from a common ancestor
Answer:
option d is correct answer
When describing a recent medical procedure, Katrina says, "The worst part was the thought of that needle being stuck through my abdomen." Given this description, Katrina appears to have undergone a(n):
Answer:
amniocentesis.
Explanation:
Amniocentesis is a medical procedure performed to obtain a sample of amniotic fluid (the fluid from the bag that bathes the fetus). The procedure is performed using an ultrasound device to guide a needle through the maternal abdomen into the amniotic cavity. When the needle reaches the amniotic cavity, about 20 ml of aspiration fluid is aspirated.
Katrina probably went through an amniocentesis process, so she felt uncomfortable with the needle in her abdomen.
Explain why the symptoms of celiac disease are consistent with the effects of celiac disease on the small intestine.
Answer:
Celiac disease damages the intestinal villi. As a result, nutrients pass through the digestive tract without being broken down and absorbed properly. This indigestion will eventually cause irritation in the intestine as well as gastrointestinal discomfort.
Explanation:
The virus that causes the human body to compromise itself and leads ultimately to the disease known as AIDS is called
A. HIV
B. Hepatitis B
C. Hepatitis C
D. HPV
Answer:
HIV
Explanation:
this is spread through contact with the body, whether it be sexually or even sharing the same spoon. It is similar as herpes but HIV can be caught by blood touching blood. HIV kills CD4 cells which are cells that help your immune system. Killing a majority of those will result in a person having AIDS
Answer:
A. HIV
Explanation: