Answer:
Extinction of even a single keystone species will cause significant change to the ecosystem. Extinction of a species that is easily replaced by others may have little impact
Explanation:
This is a muscular tube through which food passes, aided by peristaltic contractions, from the pharynx to the stomach.
As materials move from higher to lower concentration what is occurring
An inherited characteristic that, through natural selection, increases in a population because it helps to solve a survival problem at the time it emerges is called
_____________ are the tiny areas at the tip of chromosomes that grow shorter each time a cell divides and eventually disappear, ending cell replication.
The presence of the protein albumin in the urine is known as
Final answer:
Albumin in the urine, referred to as proteinuria or albuminuria, is a sign of kidney damage indicating that glomeruli are not properly filtering proteins out of the blood.
Explanation:
The presence of the protein albumin in the urine is an indication that the filtering units of the kidneys, known as glomeruli, are damaged, and this condition is referred to as proteinuria or, more specifically, albuminuria. Protein molecules, including albumin, are usually retained within the glomerular capillaries due to their size, but when the kidneys are damaged, albumin can pass into the urine. This may occur in various health conditions such as diabetic nephropathy, hypertension, or kidney diseases. It is essential to detect and manage albuminuria early to prevent further kidney damage.
Why is a larger nucleus generally less stable than a smaller nucleus?
Tyler wants to know how the growth of tomato plants is affected by the quantities of various gases in the atmosphere. What type of scientific investigation should Tyler conduct in order to accurately answer his question through direct observations? A. Tyler should research tomato plants on the internet. B. Tyler should grow tomato plants in his back yard. C. Tyler should ask a professional gardener about tomato plants. D. Tyler should perform a controlled experiment.
Answer:
The correct answer is D. Tyler should perform a controlled experiment.
within the ovary, progesterone is produced by the
A period of time during which a person infected with hiv has no symptoms
Gil's mother calls to make an appointment for her son. she reports that he has had an elevated temperature for 24 hours, ranging from 99° to 102.8° f. mrs. harris is describing which type of fever?
Final answer:
Gil's fever with temperatures fluctuating between 99° and 102.8° F suggests an intermittent fever, likely caused by a viral or bacterial infection, and while fevers can be beneficial in fighting infection, high fevers may require medical attention.
Explanation:
The fever described by Mrs. Harris for her son Gil, with a temperature range from 99° to 102.8° F (37.2° to 39.3° C), is likely intermittent. This type of fever is characterized by elevated temperatures that vary throughout the day but return to normal or subnormal levels at least once in 24 hours. The possible cause of Gil's fever could be a viral or bacterial infection, as fevers result from the body's immune response to these pathogens, leading to an upward adjustment of the body's temperature set point. It is also important to recognize that fever can play a beneficial role in fighting infections by inhibiting the growth of pathogens and speeding up cellular repair processes. However, if a fever becomes dangerously high, medical intervention may be necessary to prevent complications.
A woman who is on a low-carbohydrate diet for weight loss may have difficulty maintaining an adequate level of the b vitamins thiamin, riboflavin, niacin, and folate. what characteristic of her diet would cause this? exclusion of grain foods and cereals exclusion of fruits exclusion of dairy products exclusion of starchy vegetables
Overinflated tires and underinflated tires can both cause __________.
Overinflated tires and underinflated tires can both cause tire wear. Answer: tire tread wear.
Over time, overinflated tires lead to excessive inner tire tread wear, decreasing the overall lifespan of tires. An overinflated tire is more like to burst.
An underinflated tire is more like to roll The tire pressure is too low, and too much of the tire is in contact with the road. The underinflated tires generate heat, causes internal friction in the tire causing premature outer tread wear.
C. reduced tread wear (DriversEd.com)
The diploid number of chromosomes in dogs is 78. how many chromosomes would you find in a dog egg cell?
He peppered moth provides a well-known example of natural selection. the light-colored form of the moth was predominant in england before the industrial revolution. in the mid-nineteenth century, a dark-colored form appeared. the difference is produced by a dominant allele of one gene. by about 1900, approximately 90% of the moths around industrial areas were dark colored, whereas light-colored moths were still abundant elsewhere. apparently, birds could readily find the light moths against the soot-darkened backgroun
A. Dark moths had a survival disadvantage in industrial Dorset.
Julia plants three tomato plants in different types of soil to see which is best for gardening. All three tomato plants are the same variety. They are about the same size at the start of the experiment. Each plant receives the same amount of water each day. The independent variable is the
The independent variable in Julia's experiment is the type of soil. By planting three tomato plants in different types of soil and keeping all other factors the same, Julia can observe and compare the growth of the plants to determine which type of soil is best for gardening.
Explanation:The independent variable in Julia's experiment is the type of soil. In her experiment, Julia is testing how different types of soil affect the growth of tomato plants. The independent variable is the factor that is intentionally changed by the experimenter, which in this case is the different types of soil. By planting three tomato plants in different types of soil and keeping all other factors the same, Julia can observe and compare the growth of the plants to determine which type of soil is best for gardening.
Final answer:
The independent variable in Julia's experiment is the type of soil, which is varied to observe its effect on the growth of tomato plants, with other factors like water and plant size being consistent.
Explanation:
In the context of the experiment described, the independent variable is the type of soil used for growing the tomato plants. An independent variable is the one that is changed or controlled in a scientific experiment to test the effects on the dependent variable. In Julia's case, she is using different types of soil to determine which one leads to the best growth for tomato plants, while keeping other factors such as the amount of water, the size and variety of the plants consistent. Gary's experimental setup also highlights the importance of controlling variables to ensure that the results reflect the effects of the independent variable, which in his experiment is the amount of sunshine. By maintaining consistent conditions such as the amount of water and plant food, as well as the size and type of pot, he aims to ensure that the differences in plant growth can be attributed to the sunlight exposure.
The region of the brain responsible for emotion, speech and motor function is the ________.
What vessel delivers oxygenated blood to systemic capillaries for gas exchange? what vessel delivers oxygenated blood to systemic capillaries for gas exchange? pulmonary trunk aorta circumflex artery coronary artery?
Question 49 not yet answered points out of 1.00 not flaggedflag question question text what sequence of events usually occurs in the process of protein synthesis? select one:
a. rna → protein → dna
b. protein → rna → dna
c. dna → rna → protein
d. rna → dna → protein
The __________ of the brain is the location of our conscious mind.
a. diencephalon
b. cerebral cortex
c. cerebellum
d. brain stem
The stem is responsible for providing support to the plant. A is a type of stem that grows underground. It’s capable of asexual reproduction and food.
The rhizome is a specialized underground stem that facilitates asexual reproduction, nutrient storage, and plant expansion. Its ability to perform these functions makes it a crucial adaptation for survival and growth in various plant species. The correct answer is A. Rhizome.
The stem plays a crucial role in plant structure and function, providing support and transportation of nutrients.
Among the specialized types of stems, the rhizome stands out as an underground stem that performs multiple functions such as asexual reproduction and food storage.
Rhizomes are horizontal, underground stems that typically grow horizontally, allowing plants to spread and colonize new areas. They play a vital role in asexual reproduction by producing new shoots and roots from nodes along their length.
This ability enables plants to propagate and expand their populations rapidly, especially in favorable environmental conditions.
Additionally, rhizomes serve as storage organs for carbohydrates and other essential nutrients. During periods of dormancy or unfavorable conditions, such as winter or drought, plants can rely on the stored energy within rhizomes to sustain growth and survival until conditions improve.
One of the most notable examples of plants with rhizomes is bamboo. Bamboo rhizomes spread extensively underground, enabling the rapid growth and proliferation of bamboo forests. Other examples include ginger, turmeric, and some species of grasses.
The correct answer is A. Rhizome.
Complete question
The stem is responsible for providing support to the plant. ________ is a type of stem that grows underground. It’s capable of asexual reproduction and food storage.
A) Rhizome
B) Stolon
C) Tuber
D) Bulb
If water were flowing from area a to area b via osmosis, through a semipermeable membrane, we might expect area b to be ________ in solute concentration compared to
a.
Final answer:
Area B would have a higher solute concentration compared to area A if water were to flow from area A to area B through a semipermeable membrane via osmosis, as water moves towards the hypertonic side to balance concentration levels.
Explanation:
If water were flowing from area A to area B via osmosis, through a semipermeable membrane, we might expect area B to be higher in solute concentration compared to area A.
Osmosis is the diffusion of water through a semipermeable membrane down its concentration gradient. This means that water moves from an area where it is more concentrated to an area where it is less concentrated, in an attempt to equalize concentration levels on both sides of the membrane. If the solute cannot pass through the membrane, but water can, then water will move towards the side with the higher solute concentration in an effort to balance out the difference in water concentration. This side is typically referred to as hypertonic.
For example, imagine two sugar-water solutions of different concentrations, separated by a membrane that allows the passage of water but not sugar. Osmosis will cause water to move towards the higher sugar concentration, effectively diluting that solution until the osmotic pressure is balanced by the back pressure.
Which structure is an example of a hinge joint?
Answer:
Ankle joint, Knee joint, elbow joints are examples of hinge joints.
Explanation:
Joints are the connection between the two bones. These are joined by a ligament. There are different types of joints. Hinge joints are coming under the freely movable joints / synovial joints.
Hinge means the hinges of the door. Such types of joints can move on a single plane around a transverse axis. The joint cavity is filled with synovial fluid.
This type of joints, bones are linked with each other like a hinge. Hinge joints are also called as ginglymus joints. e.g. Ankle, Knee, and elbow.
what muscle is responsible for inflation and deflation of the lungs
Altering the shape of the lens to enable light to focus on the retina is called:
What are the dangers of snake bites
"what happens to ventilation at sub-maximal exercise at altitude?"
A warmer object radiates ___________ energy compared to a cooler object.
a) more
b) less
c) the same amount of
Answer: More
Explanation:
A warmer object radiates more energy than the cooler objects. This is because the hotter objects have more vibrating particles.
The particles vibrate because of the kinetic energy that is more in heated objects as compared to the cooler objects.
When an object is heated the particles inside it starts heating and attains more energy as compared to the cooler objects.
Hence, the correct answer is Option A
Once the chyme begins to enter the duodenum, it must first be _____ before any of the enzymes in the pancreatic juices can be activated.
Once the chyme begins to enter the duodenum, it must first be Neutralized before any of the enzymes in the pancreatic juices can be activated.
Explanation:
Chyme or chymus is the semi-liquid mass of halfway processed sustenance that is excreted by the stomach, through the pyloric valve, into the duodenum. Chyme results from the mechanical and compound breakdown of a bolus and comprise of incompletely processed sustenance, water, hydrochloric acid, and different stomach related catalysts.
Chyme gradually goes through the pyloric sphincter and into the duodenum, where the extraction of supplements starts. With a pH of roughly 2, chyme rising up out of the stomach is exceptionally acidic. The duodenum secretes a hormone, cholecystokinin (CCK), which makes the nerve bladder contract, discharging antacid bile into the duodenum.
The duodenum is a short segment of the small digestive tract situated between the stomach and the small digestive system. The duodenum additionally creates the hormone secretion to invigorate the pancreatic emission of a lot of sodium bicarbonate, which at that point raises pH of the chyme to 7 and this process is called as neutalization of chyme.
An unlearned behavior directly linked to a stimulus that is carried to completion once initiated and is essentially unchangeable is _____. see concept 51.1 (page 1138)
A fixed action pattern is a behavior that is carried out to completion once started, regardless of changes in the original stimulus and the sequence is unchangeable. The unlearned behavior of fixed action patterns are triggered by a type of external stimulus that start off a particular organism.
The ability of the heart and lungs to supply oxygen to the body is called