True. In at least one group of fish, osteichthyes, a structure known as a swim bladder was modified to become a primitive lung.
what is osteichthyes?Fish belonging to the taxonomic order Osteichthyes, also known as the "bony fish," have skeletons that are predominantly made of bone tissue. In contrast to them, the Chondrichthyes have skeletons that are predominantly made of cartilage.Jawed fish belonging to the osteichthyes order have a bony endoskeleton. It is the largest group of vertebrates and has a wide variety of freshwater and marine bony fishes.Lungfish, salmon, clownfish, and eels are four examples of Osteichthyes. Along with coelocanths, lungfish belong to the class subclass Sarcopterygii. The subclass Actinopterygii includes the fish that most people are familiar with, such as salmon, clown fish, eels, and fish.Learn more about osteichthyes here:
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which indicator, when considered in conjunction with the ecological footprint, would provide the most information about environmental impact?
Human population would provide the most information about environmental impact.
Population- A population is the total number of people living in a certain region. The entire number of residents makes up a city's population. Residents or occupiers are the terms used to describe them. The population of an area consists of everyone who lives there.
Environment- The surroundings, things, or situations in which one finds oneself. The combination of biotic (living things) and abiotic (Non-lining) (temperature, soil, etc.) elements that affect an organism or ecological community and ultimately decide its shape and survival.
Organism- A living thing made up of one or more cells and able to carry on the activities of life (as using energy, growing, or reproducing)
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In the food web picture, squirrels would be classified as ? is it
herbivore
omnivore
carnivore or
decomooser
Answer:
Omnivore
Explanation:
Squirrels mainly eat fungi, seeds, nuts and fruits, but they will also munch on eggs, small insects, caterpillars, small animals and even young snakes.
please answer accurately
Answer:
non-renewable resources can take millions of years to form such as: fossil fuels
what is percentage of oxygen of inhaled air
Answer:
21%
I hope this helps!
According to Figure 13-3, which code specifies the same amino acid as UAU?
A) UAC
B) UAA
C) UGC
D) UGU
Both UAU and a)UAC code for Tyrosine according to the codon table
__are to ribosomes as lipids are to__
A) Sugars; peroxisomes
B) Carbohydrates; rough endoplasmic reticulum
C) Nucleoli; lysosomes
D) Proteins; smooth endoplasmic reticulum
Proteins are to ribosomes as lipids are to smooth endoplasmic reticulum. Details about functions of organelles can be found below.
What are organelles?Organelles are specialized structures in the cells of living organisms that perform specific functions in the cell.
Examples of organelles are as follows:
RibosomeNucleusEndoplasmic reticulumVacuolesMitochondriaHowever, ribosomes are involved in the synthesis of proteins while the smooth endoplasmic reticulum are directly involved in the synthesis of lipids.
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Each body cell of a chimpanzee contains 48 chromosomes. After mitosis, how many chromosomes are present in each cell?
Answer:
During both mitosis and meiosis, DNA replicates first during S phase of interphase. Each copy (DNA molecule) is called chromatid. Before anaphase they remain together, joined by the centromere in the chromosome.
Part 1: How many chromatids and chromosomes are present at:
(a) anaphase of mitosis: During this phase sister chromatids split. We would have 48 chromosomes in each pole and 48 chromatides.
(b) anaphase I of meiosis: During this phase homologous chromosomes split, being a reductional division. In each pole we will have half the chromosomes we had after DNA replication. This is 24 chromosomes but 48 chromatides (remember they will split during anaphase II).
(c) anaphase II of meiosis: This is an equational division, we will have 24 chromosomes in each pole and 24 chromatides. Each chromatid is considered a chromosome.
(d) G1 prior to mitosis: During this phase DNA has not replicated yet and it is not condensed either. This formed is called chromatin. We will assign one chromatid for each chromosome. This is a somatic cell, so: 48 chromosomes and 48 chromatids.
(e) G2 prior to mitosis: After S phase, we have duplicated all chromosomes. We will assign two chromatids per chromosome: this is 96 chromatides and 48 chromosomes.
(f) G1 prior to meiosis: Before DNA duplication, 48 chromosomes, 48 chromatids.
(g) Prophase of meiosis I: After DNA replication, condensation of the chromatin takes place: 48 chromosomes, 96 chromatids.
Part 2: How many chromatids or chromosomes are present in:
(h) An oogonial cell prior to S phase: This is G1 phase, 48 chromosomes.
(i) A spermatide: This is the male haploid gametid, after meiosis: 24 chromosomes and 24 chromatids.
(j) A primary oocyte arrested prior to ovulation: They are arrested at prophase I of meiosis. This means their DNA is still duplicated and chromatides have not divided yet. 48 chromosomes and 96 chromatids.
(k) A secondary oocyte arrested prior to fertilization: They are halted at metaphase II of meiosis, meaning they have half the chromosomes (24) but chromatids are still together (48).
(l) A second polar body: They suffered the same process as the mature ovum but remained with little cytoplasm. They have 24 chromosomes and 24 chromatids.
(m) A chimpanzee sperm: They have completed both meiosis as well, they have 24 chromosomes and 24 chromatids.
Explanation:
Mitosis is a type of cell division in which the number of chromosomes in the parent cell is similar to the daughter cell. Mitosis occurs in the somatic cells.
The chromosomes present in the Chimpanzee's cell after mitosis are 48 chromosomes.
The mitosis can be explained as:
1. Mitosis is a type of cell division in which the number of chromosomes in the daughter and parent cells are similar.
2. During the DNA replication process, the DNA is duplicated and separated into the individual two daughter cells.
Thus, the cells with 48 chromosomes will give rise to daughter cells consisting of 48 chromosomes.
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People who are lactose intolerant lack the lactase enzyme. They often experience digestive problems when they eat dairy products. Do the results of demetri’s experience support this scenario? Explain your response
Answer:
Yes, the results of demetri's experience support this scenario.
Explanation:
A milk allergy is an immune response which involves the production of antibodies specific to substances in milk, such as casein. Lactose intolerance does not involve the immune system but is the result of an inability to produce the enzyme lactase. People with milk allergies suffer from different symptoms than people who are lactose intolerant. The symptoms of a milk allergy include hives, wheezing, and vomiting, whereas the symptoms of lactose intolerance are gastrointestinal distress, including gas and diarrhea.
All of the following describe outcomes of urbanization except
O decreased soil pollution
O food chain disruption in a natural habitat
O increased wastewater from sewage drainage
O loss of plant biodiversity
Answer:
O decreased soil pollution
Explanation:
Urbanization does not lead to decreased soil pollution.
Pollution is the introduction of contaminants into the environments. As urbanization progresses and the population of people in a place increases, soil pollution increases.
Also, industrial expansion causes increased production of wastes. So, some of these wastes find their way into the environment of which the soil is a main component. There is an increased amount of soil pollution.What part of the cell allows the corona vīrus to enter?
Answer:
The cellular membrane
Explanation:
I need help please
Answer:
75 percent, 25 percent
Explanation:
Neurogenesis has been seen in the __________ and in the __________. a. temporal lobe . . . hypothalamus b. olfactory bulb . . . hippocampus c. occipital lobe . . . primary motor cortex d. frontal lobe . . . somatosensory cortex please select the best answer from the choices provided a b c d
Neurogenesis has been seen in the (b) olfactory bulb, and in the hippocampus.
The process that produces new neurons is known as neurogenesis. The sub granular zone of the dentate gyrus of the hippocampus and the sub ventricular zone of the lateral ventricles are where neurogenesis continues, according to recent studies.
The process of neurogenesis, which is in charge of creating all of the organism's neurons, is created during the embryogenesis process. Progenitor cells are produced in large quantities in the SGZ and SVZ and functionally integrate into the olfactory bulb and hippocampal regions, respectively.
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Share your thoughts about how hard/easy to spot Bad Science and
Pseudoscience articles
When viewing protists in this lab, applying a drop of __________ may be necessary to slow the movement of the organisms so they are more easily viewed.
Answer: A methyl-cellulose.
Explanation:
the dysregulation of hormones may affect several pathways and processes in their body, which leads to risk in the emerging possibility for type ii diabetes, cardiovascular disease, infertility.
The most prevalent hormonal illness, polycystic ovarian syndrome, mostly affects adolescent girls as their hormonal balance and menstrual regularity mature.
Anovulation, dysmenorrhea, and amenorrhea are caused by the variability of menstrual hormones and other causes.The dysregulation of hormones may have an impact on a number of physiological pathways and functions, increasing the risk of type II diabetes, cardiovascular disease, and infertility.Genetics, neuroendocrine, lifestyle/environment, and obesity are among the risk factors that predispose people to PCOS. The pathophysiology of PCOS primarily focuses on hormonal disruption, insulin resistance, and hyperandrogenism causing poor folliculogenesis and increasing the risk of related comorbidities such endometrial cancer and type II diabetes.The explanation of potential treatments for controlling the syndrome coupled with lifestyle adjustment, which can be used singly or in combination depending on the symptoms.
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Your question seems incomplete, please find the complete question below:
Discuss the effects of hormonal dysregulation in humans.
How do simple diffusion and facilitated diffusion differ?
Answer:
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP. Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
Explanation:
how would you determine the hardness of a mineral
Mohs Hardness Scale
Explanation:
A mineral's hardness is a measure of its relative resistance to scratching, measured by scratching the mineral against another substance of known hardness on the Mohs Hardness Scale.
Natural selection occurs when which of the following conditions are met?
a.Variations between individual organisms lead to differential survival chances.
b.The conditions in an ecosystem support a wide range of living organisms
c.Individual organisms depend on each other to obtain available resources.
d. Habitat and nutrient resources in an area are plentiful over a long period of time.
Answer:
A
Explanation:
Natural selection is the process through which populations of living creatures adapt and change. Therefore option (A) is the correct answer.
What is natural selection?Natural selection refers to the process in which different individuals with distinct phenotypes have variable rates of survival and reproductive success. The gradual shift, over the course of generations, of the heritable characteristics that are typical of a population is an important aspect of the evolutionary process known as evolution.
In the process of evolution, four fundamental ideas are at play: variation, heredity, selection, and the passage of time. Natural selection is widely regarded as the key evolutionary mechanism, and these are its constituent parts.
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Please help due soon.
Explanation:
phytoplanton. its the answer
What are the uses of the energy provided by ATP in the living cells?
Answer:
ATP functions as the energy currency for cells. It allows the cell to store energy briefly and transport it within the cell to support endergonic chemical reactions. The structure of ATP is that of an RNA nucleotide with three phosphates attached.
newton's first law of motion shows that a net force is needes in order for an object to
Newton's first law of motion states that a net force is required for an object to move. Newton's first law of motion states that an object in motion tends to stay in motion unless acted upon by an external force.
Similarly, if an object is at rest, it will remain at rest unless an unbalanced force acts on it.
The law of inertia is Newton's first law. The object will continue to behave the same as if there was no net force. They either keep moving at a constant speed or remain stationary unless an unbalanced force acts on them. This unbalanced force changes velocity and/or direction depending on the magnitude of the direction of the resultant force. Newton's first law of motion is also known as the law of inertia.
According to Newton's first law, objects behave as expected. If the ball is on the table, it cannot roll or fall off the table. An object in motion does not change direction unless forced off course by a force.
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select each of the nervous system structures that are part of the central nervous system. a. brain stem b. spinal nerves c. cerebral hemispheres d. cerebellum e. cranial nerve ii
All of the given structures are the part of the central nervous system.
What is Nervous System?According to biology's classical idea of the nervous system, an animal's nervous system is a highly sophisticated component that coordinates its movements and sensory data by sending and receiving signals from and to various regions of the body. In order to react to such occurrences, the nervous system and endocrine system collaborate to detect environmental changes that have an effect on the body.
Around 550–600 million years ago, worm-like invertebrates were the first to develop nervous tissue. The discovery of electrical impulses in plants and their utilization in recent decades, however, has called into question this conventional wisdom. These findings have led some researchers to suggest that plants have neural systems and that the science of plant neuroscience should be established.
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The image below is called a Label the parts of diagram below.
Answer:Is B because am not sure
Explanation:
It will be correct
A feature of an organism.
as ambient temperature decreases, metabolic rate in an ectotherm decreases to maintain body temperature.
The order is False.
In Ectotherms, decrease in ambient temperature causes body temperature to decrease, that causes a decrease in Metabolic rate.
What are ectotherms?Any animal that is considered to have cold blood, or whose ability to regulate body temperature depends on environmental factors like sunlight or a heated rock surface. Ectotherms are organisms whose internal physiological sources of heat play a small or almost insignificant role in regulating body temperature. Such organisms depend on heat sources in their surroundings, which enables them to have incredibly efficient metabolic rates. Fish, amphibians, reptiles, and invertebrates are all ectotherms. Endothermic organisms include human. This suggests that humans are less dependent on the external environmental temperature than ectothermic (poikilothermic) animals like fish and reptiles.Learn more about the Ectotherms with the help of the given link:
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Decomposers, detrivores, and scavengers feed on dead organic material. How are decomposers different from scavengers and detrivores?.
Answer:
Okay, so a detrivore is a type of decomposer.
Basically, scavengers eat their food while decomposers do not eat the food, but instead break it down further externally.
The difference between a decomposer and the scavenger is that the scavenger is the one that consumes dead plants, animals or carrion to break down the organic materials into small particles.
The decomposer instead consumes the remains produced by the scavengers.
Examples of decomposers can be bacteria and fungi.
Examples of scavengers can be animals (like insects, birds, little critters)
Explanation:
Which characteristic of sound makes it possible for bats to fly in the dark without hitting any objects?
Answer: echo location
Explanation:
Which of these is NOT an
example of insulator?
A. rubber pot holder
B. cloth curtains
C. aluminum foil
Answer:
ITS A Rubber pot holder
Explanation:
cauze rubber don't pass electricity...
Hope it helps :)
The stage of meiosis where the chromosomes do not move apart equally and cause chromosomal abnormalities is
Answer: anaphase
Explanation: Nondisjunction can occur during anaphase of mitosis, meiosis I, or meiosis II. During anaphase, sister chromatids (or homologous chromosomes for meiosis I), will separate and move to opposite poles of the cell, pulled by microtubules
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Some researchers use fmri technology to study activity in the brain. What is the underlying activity detected by fmri?.
Some researchers use fMRI technology to study activity in the brain. The underlying activity detected by fMRI is by measuring the changes occurring in both oxygen amount present in the blood as well as the blood flow amount.
fMRI technology helps to detect the activity of the brain by measuring the changes occurring in both the amount of oxygen present in the blood as well as the amount of blood flow. This measurement is termed as the activity depending on the blood-oxygen level or called BOLD activity.
Functional magnetic resonance imaging or fMRI measures the activity of the brain by detecting various changes associated with the flow of blood. This technique will be relying on the fact of coupled activity of cerebral blood flow as well as neuronal activation. When an area of the brain is used up, there will be an increase in blood flow to that region.
The primary fMRI form uses contrast which is blood-oxygen-level dependent. This is a specialized brain type and a body scan that is used to map the activity of neurons in the brain or the spinal cord present in humans or in other animals by imaging the hemodynamic response which is related to the use of energy by the brain cells.
fMRI has come to dominate the mapping research of the brain as it does not involve injection uses, surgery, the ingestion of substances, and ionizing radiation exposure. This measure is usually corrupted by noise which is from various sources most frequently. Hence, the underlying signals are extracted by statistical procedures.
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