Answer:
Symptoms of protozoan and helminthic diseases are diarrhea, nausea, vomiting, cramps, fever, dehydration, anorexia, abdominal discomfort and weight loss.
Explanation:
Protozoan diseases such as malaria, giardia, and toxoplasmosis caused by protozoan organisms while helminthic diseases are caused by parasitic worms. These worms attack on the helminths which is a body part of human. Symptoms of protozoan and helminthic diseases are due to the attack of parasitic worms and harmful protozoans on the body parts of human beings.
The correct option is b) The damage to host tissues by the parasites. Symptoms of protozoan and helminthic diseases are due to the damage to host tissues by the parasites.
Damage to Host Tissues: Parasites can cause physical harm to the tissues they inhabit, leading to symptoms such as inflammation, pain, and dysfunction of the affected organs.Release of Toxins: Some protozoa and helminths release toxic substances that can directly harm host cells or disrupt normal physiological processes, resulting in symptoms.Immune Response of the Host: The body's immune system reacts to the presence of parasites. This immune response can cause symptoms such as fever, swelling, and tissue damage, as the body attempts to fight off the infection.These mechanisms together contribute to the overall symptoms experienced during protozoan and helminthic infections.
COMPLETE QUESTION
Symptoms of protozoan and helminthic diseases are due to ________.
a) The release of toxins by the parasites
b) The damage to host tissues by the parasites
c) The immune response of the host
d) All of the above
What is the main purpose of seeds in plants that have them?
Answer:
Fruit (pods or hulls etc) bearing seeds are a means of dispersal for plants because they are sessile and have no means to move once germination anchors them with roots. Seeds are the dormant propagules or the quiescent, dispersing agents of the next generation that travel away from the parent plant in a disposal. This is why fruit/seeds are categorized by their dispersal by wind (hydrochoric) or by animals (zoochoric).
Explanation:
the main purpose of seeds in plants Seeds serve as a means of reproduction for plants that have them and that contain the genetic information necessary to produce a new plant.
What is the significance of the seeds of the plant?Seeds provide an efficient way for plants to spread and colonize new areas, protect the developing plant embryo from the harsh environment, and also provide food for a variety of organisms, including birds, insects, and mammals. Seeds are an important source of food for humans and livestock, as many staple crops, such as rice, wheat, corn, and beans, are produced from seeds.
Hence, the main purpose of seeds in plants Seeds serve as a means of reproduction for plants that have them and that contain the genetic information necessary to produce a new plant.
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Explain the relationship between cells, tissues and organs
Answer:
Cells are the smallest structural and functional unit of the Human body.
When a group of specialized cells perform a single job they form a TISSUE.
When a group of tissue carry out a particular function in the body they form the ORGANS.
Now when a group of organs perform the life process in the human body it constitute an ORGAN SYSTEM.
Explanation:
Cells are the basic units of life that pool together to form tissues. Tissues are groups of similar cells that perform a common function. Various types of tissues collaborate to form organs, each with a particular role in the organism.
Explanation:The relationship between cells, tissues, and organs stems from the hierarchical organization of the body, in which increasing complexity levels lead to multicellular organisms.
Cells are the basic units of life, capable of performing all vital functions. They can divide to create new cells and group together performing similar functions to form tissues.
Tissues are groups of cells performing a common function. Organs, however, are complex structures consisting of different types of tissues operating in concert to fulfill a specific job in the organism, like the heart pumping blood or lungs ensuring oxygen supply.
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Bacteria are microscopic organisms that reproduce rapidly and often cause disease.
Antibiotics are drugs given to people to cure bacteria-caused diseases. Since the 1950s,
scientists have observed that antibiotics cannot kill many kinds of bacteria. What best
explains the reason why antibiotics are less effective now?
(10 Points)
O
People today do not take antibiotics as directed by doctors.
O
Antibiotics used today are weaker drugs than those used in the past.
O
The genes of some kinds of bacteria make them resistant to antibiotics.
O
Doctors have increased the testing of patients for diseases caused by bacteria.
Answer: The genes of some kinds of bacteria make them resistant to antibiotics.
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What triggers the release of catecholamines from the adrenal glands?
options:
Hypothalamus
Pineal gland
Pituitary gland
Thalamus
Medulla oblongata
Answer:
C
Explanation:
In times of stress or danger, the pituitary gland triggers the release of catecholamines from the adrenal glands, which manufacture adrenaline, and release it into the body, hence option C is correct.
How catecholamines release from the adrenal glands?Your body is made ready to deal with a stressful "fight or flight" scenario, the cortex and medulla make up the adrenal gland.
The medulla generates catecholamines such as epinephrine and norepinephrine, whereas the cortex produces steroid hormones such as glucocorticoids, mineralocorticoids, and adrenal androgens.
Your adrenal glands, two little glands placed above your kidneys, produce catecholamines. In reaction to mental or emotional stress, the body releases these chemicals.
Therefore, dopamine, norepinephrine, and epinephrine are the three primary catecholamine subtypes. Adrenaline is another name for epinephrine, hence option C is correct.
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Which of the following statements about weathering is true?
a. Physical and chemical are the two types of weathering.
b. Weathering occurs when rocks are subjected to the movement of wind or water.
Humans are the only cause of weathering.
d. Movement is required for weathering to take place.
Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands. Salivation is primarily controlled by nerves of the parasympathetic nervous system which release acetylcholine onto the acinar cells of the salivary glands.
A. True
B. False
Answer:
True
Explanation:
Salivation or the secretion of the saliva through the salivary glands present in the mouth are controlled by the nervous system.
The primary nervous system involved in the salivation is the parasympathetic system of neurons. The parasympathetic system is involved in the rest and digest response of the body.
The parasympathetic system act by releasing acetylcholine in the acinar cells of the salivary glands. The acetylcholine binds to the receptors and causes a release of calcium. The calcium in the cell fuse with the membrane and thus saliva is released.
Thus, true is the correct answer.
Describe adaptations that an organism that lives in a reef might have. How might these adaptations be different from an organism that lives in the open ocean?
Answer:
An organism that lives in a reef may adapt to warmer, more nutrient-rich water that has a lot of sunlight; an organism in the open ocean would not need these adaptations because it is colder, and the increase in depth offers areas with less sunlight.
Explanation:
Reef organisms have a variety of adaptations to help them survive in their challenging environment. These adaptations include:
CamouflageProtection from predatorsAbility to withstand strong currents and wavesAbility to find food in a limited environmentWhat are these adaptations?Camouflage: Reef organisms use camouflage to blend in with their surroundings and avoid predators. For example, some reef fish have bright colors that match the coral they live among, while others have camouflaged patterns that make them difficult to see against the reef background.
Protection from predators: Reef organisms have a variety of ways to protect themselves from predators. For example, some reef fish have sharp spines or venomous fins, while others have thick shells or camouflaged patterns.
Ability to withstand strong currents and waves: Reef organisms have adapted to withstand the strong currents and waves that are common in reef environments. For example, many reef fish have flattened bodies that help them to reduce drag, while others have suction cups or other features that help them to attach to the reef.
Ability to find food in a limited environment: Reef organisms have adapted to find food in the limited environment of the reef. For example, some reef fish graze on algae, while others eat small invertebrates or other fish.
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After a major fire, grasses that are pioneer species start to grow in the ashy soil. The following list includes some of the ways that the grasses affect the ecosystem.
absorbing nutrients from the soil
absorbing water from the soil
providing food for animals
preventing erosion
Which of the items on the list contribute to ecological succession in the burned area?
Answer:
Providing food for animals
Answer:
preventing erosion and providing food for animals
Explanation:
Ecological succession is a process that starts with hardy pioneer species and leads to a diverse ecosystem. After a fire, the ashy soil is vulnerable to erosion by wind and water. Grasses prevent erosion so that the nutrients in the soil are still available for other plant species. By providing a source of food, grasses attract animals to the area.
Question text
Look at the scientific names below. Which 2 organisms are most closely related? Explain your answer using a complete sentence.
Populus deltidoes
Canis lupus
Felis domesticus
Canis familiaris
Canis lupus (wolf) and Canis familiaris (domestic dog) are the most closely related organisms, sharing the same genus and with the domestic dog being a subspecies of the wolf.
The two organisms that are most closely related are Canis lupus and Canis familiaris. These organisms share the same genus, Canis, which indicates that they belong to the same group that includes dogs, wolves, and other dog-like animals.
Furthermore, Canis lupus familiaris (the scientific name for the domestic dog) is a subspecies of Canis lupus (the wolf), according to the binomial nomenclature system developed by Linnaeus, which uses two names to refer to species. This implies that they have a very close genetic relationship and are capable of interbreeding to produce viable offspring.
What are the two ways macrophages are able to respond to invading germs?
Explanation:
Macrophages are effector cells of the innate immune system that phagocytose microscopic organisms and emit both expert incendiary and antimicrobial middle peopleThe macrophages assume a significant role in wiping out unhealthy and harmed cells through their customized cell death Macrophages are produced through the separation of monocytes, which transform into macrophages when they leave the bloodThere are two kinds of tissue macrophages such as macrophages that live inside explicit organs/tissue (free macrophages and fixed macrophages) and macrophages got from monocytes in response to inflammatory stimulihow many chromosomes do humans inherit from each parent
Identify the cavity that develops entirely from the mesoderm.
Organelles protect a cell by Select one:
A. sequestering biochemicals that could dismantle other cellular structures.
B. forming a thick outer barrier.
C. containing powerful enzymes that kill any bacteria that enter.
D. producing new DNA if the genetic material is damaged.
Explanation:
the answer is B
it provides boundaries for the cell to protect it from the environment and regulate the passage of wastes
Similar patterns of embryological development in different but related organisms are responsible for the formation of
Answer:
This question lacks options, options are:
a) homologous structures
b) analogous structures
c) Hox genes
d) intermediate fossil forms.
The correct answer is a.
Explanation:
Evolutionary theory predicts that related organisms will have similarities that come from common ancestors. Similar characteristics due to kinship are known as homologies. Homologies can be discovered by comparing the anatomical characteristics of different living beings, observing cell similarities and differences, studying embryological development, and studying the vestigial structures of the organisms themselves. Homologous structures are those that have a common origin regardless of the function they fulfill.
Answer:
Homologous structures
Explanation:
Homologous structures are structures that such as a part of the body, an organ or a gene that can be found or observed in organisms that have a shared ancestry.
Homologous structures for these organisms with shared ancestry can be found to be located at the same place and perform the same function in such organisms.
The DNA that codes for homologous structures is the same the organisms that have a common or shared ancestry.
For example:
A bat, a whale and an human have a common and shared ancestry which means that they are mammals. The homologous structures in these organisms are
Wings which bats use to fly, fins used by whales for swimming in the ocean and limbs in human. These homologous structure performs the same functions in each organism and that function is for movement.
Which statements are true? Check all the apply
In eukaryotes, DNA is found in the cytoplasm of the cell/ RNA is the nucleic acid that helps build proteins/ DNA is the nucleus acid that carries genetic information/The structure of proteins is determined by DNA/The chromosome is made of RNA
RNA is the nucleic acid that helps build proteins, DNA is the nucleus acid that carries genetic information and the structure of proteins is determined by DNA.
What are nucleic acids?Large macromolecules called nucleic acids are necessary for all organisms and viruses to function. The preservation and expression of genetic data is a key role of nucleic acids. The information cells need to build proteins is encoded in deoxyribonucleic acid, or DNA.
Genetic information is carried by nucleic acids, deoxyribonucleic acid (DNA), and ribonucleic acid (RNA), which are read by cells to create the RNA and proteins that allow living organisms to operate. This knowledge may be duplicated and transmitted to the next generation thanks to the well-known DNA double helix structure.
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Correct statements are RNA is the nucleic acid that helps build proteins , DNA is the nucleus acid that carries genetic information and The structure of proteins is determined by DNA .
Let's analyze each statement to determine which are true:
In eukaryotes, DNA is found in the cytoplasm of the cell: This statement is false. In eukaryotic cells, DNA is found in the nucleus and in organelles like mitochondria and chloroplasts.RNA is the nucleic acid that helps build proteins: This statement is true. RNA, specifically messenger RNA (mRNA), carries the genetic information from DNA to ribosomes where proteins are synthesized.DNA is the nucleic acid that carries genetic information: This statement is true. DNA contains the genetic blueprint for the development and functioning of living organisms.The structure of proteins is determined by DNA: This statement is true. The sequence of nucleotides in DNA determines the sequence of amino acids in proteins, which in turn determines the protein's structure and function.The chromosome is made of RNA: This statement is false. Chromosomes are made primarily of DNA and proteins called histones.what is the water cycle
Answer:
The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth.
Explanation:
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Body cells include nerve cells and muscle cells. Each makes a number of different proteins. For example, nerve cells make cholinesterase and muscle cells make myosin. Which statement best compares the DNA normally found in these two types of cells in an individual?
(1) The two cells have identical DNA sequences and use the same section of the DNA to make these two proteins.
(2) The two cells have identical DNA sequences, but use different sections of the DNA to make these two proteins.
(3) The two cells have different DNA sequences, but use the same section of the DNA to make these two proteins.(4) The two cells have different DNA sequences and use different sections of the DNA to make these two proteins.
The DNA normally found in nerve cells and muscle cells is identical in sequence, but different sections of the DNA are used to make different proteins.
Explanation:The correct statement that best compares the DNA normally found in nerve cells and muscle cells is (1) The two cells have identical DNA sequences and use the same section of the DNA to make these two proteins.
All cells in the body generally contain the same DNA sequences. The differences between cell types, such as nerve cells and muscle cells, arise from the specific genes that are expressed or turned on in each cell. In this case, both nerve cells and muscle cells have the same DNA sequences, but they use different sections of the DNA to make different proteins.
The Neanderthal skeleton known as the "old man" showed evidence of many injuries over a long life. Several broken bones had healed, and almost all of his teeth had fallen out. What does this most likely indicate?
Answer:
It has been suggested that these kinds of lesions may be indicative of fighting with other members of its species or the attacks of predators
Explanation:
The Neandertals were exposed to very hard environmental conditions, thereby these lesions may be indicative of such conditions to which this species was exposed.
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Homeostasis is NOT disrupted when a stressor triggers a nonspecific response because the body quickly adapts in order to function.
options:
True
False
Answer:
True
Explanation:
because the homeostasis controls the body to regulate itself.
Answer:
the answer is false.
Explanation:
Homeostasis IS disrupted when a stressor triggers a nonspecific response because the body quickly adapts in order to function.
What factor makes the Hawaiian Islands the perfect place for plant species to diversify? *
the volcanic soil and grounds are an extreme factor of having diversity in plant life. the air around the islands is also a little bit cleaner than air in nearby continents because the hawaiian islands are smaller so the amount of pollution is lower as well.
-ari.
Final answer:
The Hawaiian Islands are a prime location for plant species diversification due to their isolation, diverse ecosystems, and unique environmental conditions, leading to a high rate of endemism and evolutionary adaptation among plants.
Explanation:
The Hawaiian Islands represents a prime example of a location where plant species have diversified remarkably. This is largely due to the islands' unique geographical isolation, combined with a diverse range of ecosystems, such as alpine deserts, ocean coastlines, dry shrublands, and rainforests. The flora of Hawai'i is incredibly unique, with 88% of its species being endemic, found nowhere else on Earth. These conditions have created a hotspot for evolutionary diversification.
Plants originally reached Hawai'i by various means such as wind, birds, and ocean currents. Once there, they encountered a multitude of habitats which, coupled with the islands' isolation for 47 million years, allowed these early colonisers to evolve into a vast array of new species. The phenomenon of plants adapting to different environments and subsequently becoming new species through processes like self-pollination and fast growth has been significant in Hawai'i. An illustrative example includes a single colonist species in the Lobeliad group giving rise to 126 new species and in the Silversword alliance, where one species diversified into 30 new variants.
Additionally, human arrival introduced new plant species, further enriching Hawai'i's botanical diversity. This strong cultural connection to plants is evident in Native Hawaiian practices such as hula, medicine, and agriculture, highlighting the deep interconnectedness between the people and their natural environment.
what can lead to groundwater shortages
- 1.) Groundwater depletion most commonly occurs because of the frequent pumping of water from the ground.
- 2.) We continuously pump groundwater from aquifers and it does not have enough time to replenish itself.
- 3.) Agricultural needs require a large amount of groundwater.
- 4.) The activities that lead to groundwater depletion come mostly from humans, but a portion of it also comes from changes in our climate and can speed up the process.
Final answer:
Groundwater shortages can be caused by overpumping, excessive use of surface water, and climate change.
Explanation:
Groundwater shortages can be caused by various factors. One of the main reasons is overpumping of groundwater from wells, which leads to a drop in the water table. This is known as groundwater mining and can result in the depletion of regional water tables. Additionally, excessive use of water from rivers, lakes, and reservoirs can also contribute to groundwater shortages. Climate change and melting glaciers associated with global warming further aggravate the problem. Saltwater intrusion, subsidence, and sinkholes are other issues that can arise due to groundwater shortages.
Hydrochloric acid is secreted by which of the secretory cells of the stomach?
Answer:
Parietal cells
Explanation:
Final answer:
Hydrochloric acid (HCl) in the stomach is secreted by parietal cells which are located in the middle region of the gastric glands. These cells contribute to the highly acidic environment needed for digestion and protein breakdown, and also produce intrinsic factor for vitamin B12 absorption.
Explanation:
Hydrochloric acid (HCl) is a vital component of gastric juice that helps in the digestion process by denaturing proteins and activating the enzyme pepsin. The parietal cells are responsible for the secretion of HCl in the stomach. These cells are located primarily in the middle region of the gastric glands, particularly in the fundus and body of the stomach, which are sites of most chemical digestion. The secretion of HCl by parietal cells leads to a highly acidic environment with a pH ranging from 1.5 to 3.5, crucial for the activation of pepsinogen into pepsin by the chief cells, and for killing harmful bacteria present in food.
In addition to HCl, parietal cells also produce intrinsic factor, a necessary glycoprotein for vitamin B12 absorption. This complex interplay of gastric secretions, including the mucus from mucus-secreting cells and hormones from the pyloric antrum such as gastrin, contribute to the efficient breakdown of proteins in the stomach, which is continued in the small intestine for complete digestion.
Week 1
Use a calculator to compute
the average heights of the
plants in each group to the
nearest centimeter.
Week 1 Average Height
Control Group:
Exper. Group:
DONE
cm
cm
5
T
6
1
3 4 5
Control Group
6
2 3 4 5
Experimental Group
) Intro
Answer:
edge 2020 bio - Lab: Interdependence of Organisms -
Question: Use a calculator to compute the average heights of the plants in each group to the nearest centimeter.
Week 1 Average Height
Control Group: 9 cm
Exper. Group: 8cm
Difference: -1 cm
Week 3 Average heights
Control Group: 22 cm
Exper. Group: 26 cm
Difference: 4 cm
Week 5 Average Heights
Control Group: 49 cm
Exper. Group: 55 cm
Difference: 6 cm
Explanation:
Generally, the hormones secretin and cholecystokinin which are released by duodenal enteroendocrine cells will ________. decrease the activities of the accessory digestive organs increase the force of stomach contractions increase the release of digestive enzymes and bile increase stomach emptying
Answer:
c. increase the release of digestive enzymes and bile
Explanation:
Secretin and cholecystokinin are hormones produced in the duodenal region of the small intestine. They are both involved in the release of digestive enzymes and bile.
Secretin is actively involved in controlling the pH of the chyme when it enters the duodenum from the stomach. It does so by inhibiting the release of gastric acid from the parietal cells in the stomach. Secretin induces the release of sodium bicarbonate ions from the pancreas which help to increase the pH of the chyme. This hormone also stimulates the secretion of bile.
Cholecystokinin (CCK) stimulates the contraction of the gallbladder and the release of bile into the duodenum. CCK also acts on the pancreas, stimulating it to produce pancreatic juices for digestion.
The overgrowth of algae on the surface of this water is caused by
A) a decrease in the oxygen levels in the water
B) not enough primary consumers in the ecosystem
C) an increase in nitrogen levels in the water from fertilizer runoff
D) an excess of carbon dioxide in the water due to an increase in the number of fish
Answer:
The answer is C. an increase in nitrogen levels in the water from fertilizer runoff
Explanation:
The overgrowth of algae on the surface of this water is caused by an increase in nitrogen levels in the water from fertilizer runoff.
An increase in nitrogen levels in the water from fertilizer runoff. Thus the correct option is C.
What is algae?Algae is defined as a group of predominantly aquatic, photosynthetic, and nucleus-bearing organisms that lack the true roots, stems, leaves, and specialized multicellular reproductive structures of plants.
Excess nitrogen and phosphorus cause an overgrowth of algae in a short period of time, also known as algae blooms. The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants.
Aquatic herbicides used to treat algae are called algaecides. They're often copper-based compounds (e.g. copper sulfate, copper chelate communes, chemical Endothall). Effective if the entire surface is treated.
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Analysis of a blood sample from a fasting individual who had not eaten for 24 hours would be expected to reveal high levels of ________.
Answer:
Glucose
Explanation:
As since no other foods are found such as carbs the body breaks down the stored glycogen to produce glucose.
If you want to know the process of how the glucose is made pls comment.
In a fasting state of 24 hours, a blood sample is expected to reveal elevated levels of free fatty acids due to the body's catabolic response to low blood glucose levels, which includes increased lipolysis.
Analysis of a blood sample from a fasting individual who had not eaten for 24 hours would be expected to reveal high levels of free fatty acids. When the body is in a fasting state, particularly after 18 hours, it enters a catabolic state due to low blood glucose levels, leading to the release of glucagon from the pancreas.
This hormonal action facilitates the breakdown of glycogen stored in the liver and stimulates the mobilization of lipolysis in adipose tissues. As triglycerides are broken down, the concentration of free fatty acids in the blood increases significantly. In a fasting state, the concentration of free fatty acid-albumin complex in plasma can rise to about 0.7 to 0.8 microequivalents/ml of blood plasma.
What is the function of stomata?
⚫️ Stomata allow gases to enter and exit the leaf.
⚫️ Stomata absorb water and minerals from the ground.
⚫️ Stomata anchor the plant in the ground.
⚫️ Stomata absorb sunlight for photosynthesis.
Answer:
A)Stomata allow gases to enter and exit the leaf.
Explanation:
Answer:
Stomata allows gases to enter and exit the leaf
Explanation:
What is the function of restriction endonucleases in bacteria? View Available Hint(s) What is the function of restriction endonucleases in bacteria? They serve no function. They allow bacteria to genetically recombine with other bacteria. They allow bacteria to engineer new DNA fragments. They provide a defense mechanism against infection by viruses.
Answer:
They provide a defense mechanism against infection by viruses.
Explanation:
They are the natural enzymes of bacteria, which they use for their own protection against viruses. The restriction enzymes cut down the viral DNA, but does not harm to the bacterial chromosome. They are called restriction enzymes because they restrict the growth of virus.
Solar and wind energy are examples of _____ energy.
A. Electrical
B. None of the choices are correct
C. Renewable
D. Sound
Answer:
Renewable energy
Explanation:
Answer:
Renewable energy
Explanation:
Renewable energy
Describe the habitat of the giraffe.
Answer:
Giraffes can inhabit savannas, grasslands or open woodlands.
Explanation: