In the given salamanders, females are the heterogametic sex. The correct explanation of this cross is that both of the parents were ZW and WW offspring were not able to survive.
The question is incomplete. The complete question is:-
In a particular species of salamander, the sex of a female can be changed genetically, thereby transforming her into a male salamander. These particular type of salamanders are termed as sex-reversed males. When a sex-reversed male salamander is crossed with a female one (normal), about 2/3 of the offspring turn out to be female while 1/3 of them are male. Given this observation, which of the following options will be true for these salamanders?
A. Males are the heterogametic sex.
B. These salamanders display genic sex determination.
C. Females are the heterogametic sex.
D. Females are the homogametic sex.
E. They show hermaphroditism.
How can one explain the results of this cross?
1. The sex-reverse parent was ZZ, while the female parent was ZW and the ZW offspring could not survive.
2. The sex-reverse parent (male) possessed two W chromosomes.
3. Both of the parents were ZW type while the WW offspring were unable to survive.
4. The female parent possessed two Z chromosomes.
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Explain the interaction of flexors and extensors. Refer to the role of tendons, ligaments and bones. Give at least 5 examples of flexor-extensors pairs and the movements they control
The flexor muscles are muscles that bend joints while extensor muscles are muscles that straighten these joints. These muscles are connected to the bone by tendons. Ligaments do not connect muscles to the bone, instead, it connects bones to another bone. Flexor and extensor are what you call antagonistic muscle pairs that oppose the function of each other.
Examples of flexor-extensor pairs in the body are the biceps and triceps, quadriceps and hamstrings, pectorals and trapezius, gluteus maximus and hip flexors, and tibialis anterior and extensor hallicus longus.
Movement of each pair:
• biceps and triceps ,(located in the arms) - Biceps are muscles that contract bends the elbow towards the body, while triceps will relax the muscles or straighten them.
,• quadriceps and hamstrings, (located in the knees area) - Quadriceps bends and hamstrings straightens. It helps you bend your knee.
,• pectorals and trapezius, (located in the chest to shoulders area) - The pair will move the arms towards the body and away from the body. It gives us the ability to swim. The pectorals are major muscles of the chest area that can both extend and bend since it is joined in with two different heads. The trapezius is located at the upper back area to the shoulders of the body and aids the pectorals in the extension and bending of the arms.
,• gluteus maximus and hip flexors, (located in the hip area) - It is important for standing, walking, and staying upright. Gluteus maximus is the major muscle in the thigh that straightens the lower limbs. Hip flexors are a collection of flexor muscles that bend the thigh forward.
,• Tibialis anterior and extensor hallicus longus ,(located in the foot) - The tibialis anterior flexes the ankle away from the foot while the extensor hallicus longus bends the foot upward towards the body.
01. A Study is Being Planned to Examine the Effects of Drug 911-918. The Goal of the Study is to Examine the Effects of Drug
911-918 on Human Blood Pressure Control,
Select the Best-Correct Statements as it Pertains to the Control Group and Experimental Group.
m
The Control Group Receives No Drug 911-918.
The Control Group Receives Drug 911-918.
The Experimental Group Receives No Drug 911-918.
The Experimental Group Receives Drug 911-918.
The Best-Correct Statements as it Pertains to the Control Group and Experimental Group are:
The Control Group Receives No Drug while The Experimental Group Receives No Drug 911-918.What are the control and experimental group in a study?
The control group in a study is the group in which no changes are applied to the group.
In the control group, the variables are kept constant, hence, the control group is also known as the constant group.
The experimental group in a study is the group to which the treatment being studied is applied. The control group receives the treatment of the variable under study.
Hence, the group that receives the drug 911-918 is the experimental group.
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Give kudzu classification and general description.
Kudzu is a leafy vine. Its scientific name is Pueraria montana. It was introduced in the U.S. from Japan and China in the decade of 1930 to prevent soil erosion. As it doesn't have predators, it grows and spreads easily in the country. It is woody and it has approximately 60 feet, growing in each season. Its leaves are large and has three broad leaflets, with hairy margins. The flowers are purple and the seed pots are flat and hairy. Kudzu has been studied to understand its many possible benefits to human health, as it is traditionaly used in its place of origin to treat menopausal symptoms, alcoholism, diabetes, fever, among other conditions. It became an invasive species due to the lack of predator, causing harm to many environments where it has spreaded.
What type of bonds give
water special
characteristics?
A. hydrogen bonds this
B. non-polar bonds
C. covalent bonds
D. adhesion bonds
Answer: c
Explanation:
Answer:
c
Explanation:
Which of these is a heterotroph?O plantO producerO consumerOphytoplankton
As we know an heterotroph is an organism that obtains it energetic input from an external source
Which of the following is true regarding the cell theory? Choose all answers that apply: Choose all answers that apply: (Choice A) A Single cells are non-living. (Choice B, Checked) B All living things are made of many cells. (Choice C, Checked) C Cells can only be formed from other cells. (Choice D) D Cells make up atoms.
Answer:
B and C are the answers for this question
over the course of 45 years the moth population would change by ?
Over the course of 45 years the moth population would change by colour because of the effects of Industrial Revolution. This is due to the effects of air pollution reffered to as industrial melanism. During this period, there was an increased in the population of dark-coloured moths. As an effect, the pale-colored moths were extra detectable to predators.
building polymers requires the process of ______.
-hydrolysis (adding water)
-cellular respiration
-dehydration synthesis (removing water)
-gluecolysis (adding glue)
The enzyme catalase is an important chemical in the functioning of what?
The enzyme catalase is in charge of the decomposition of hydrogen peroxide, a molecule that is toxic for the cell. This enzyme transforms hydrogen peroxide (H2O2) into water (H2O) and oxygen (O2), two elements non-toxic and necessary for cells. It is found on the peroxisomes of all cells and it is very important mainly on blood cells.
Can someone help me label this I’ve been stuck overnight studying for finals and I can’t seem to figure this out.
To label the structures and functions of the immune response in the figure, we can start by identifying the cells:
Structures:
a- Antigen;
b- immune cell - most cases naive B-cell;
c- immune cell - activated can be a B-cell or T-cell;
d- Epitopo of the antigen;
e- Antigen in direct contact with the immune cell
f- Immune cell in direct contact with the antigen;
g- Epitopo for antigen identification;
h- Immune cell - activated and that can determinated the antigen and kill it - T-cell (antibodies).
Functions:
a - pathogen, the cell responsible to cause the disease;
b - immune cell that identify the antigen;
c - immune cell that can act and find the antigen in the body;
d and g - proteic structure that act like an ID or presentation card for the cells;
e and f - the cellular contact with the pathogen;
h - cells that are responsible to deal with the pathogen and protect the body.
Tissues in the human body refers to…Select one:a.a group of different cells working together to perform a common functionb.a group a different cells working together to perform different functionsc.a group a similar cells working together to perform a common functiond.a group a similar cells working together to perform different functions
Tissues in the human body refers to a group a similar cells working together to perform a common function. They have similar structures and work as a unit. It is made up of specialized cells grouped together depending on its structures and functions. It is the one that makes up the organs and the other parts of the body.
Answer - c. a group a similar cells working together to perform a common function
Tissues are known to be a group or number of cells functioning together to perform an activity. Therefore, according to the question, tissue is a group of similar cells working together to perform a common function.
A cell is the structural and functional unit of life. A number of similar cells give rise to tissue. In human body, there are various organs that are made up of a number of tissues.
Tissues in human body are made to perform various function such as - any kind of movement. Humans being multicellular, has different kinds of tissues.
A number of tissues makes up an organ that is specified in performing one activity.
A number of organs make up an organ system and then group of organ system forms an organism. A tissue is responsible for the specific function of an organ.
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Which of the following choices is NOT part of the chloroplast?ооооcristaestromathylakoidschlorophyll
The parts of a chloroplast are the inner membrane, outer membrane, intermembrane space, thylakoid membrane, stroma and lamella.
Chlorophyll is the green pigment found within the thylakoid membrane.
Cristae are found on the inner membraine of mitochondria in the cell cytoplasm.
Answer - Option 1 - cristae
Need to know which one is correct for cell bio
The motor proteins that move along the cytoskeleton's microtubules are called kinesins. Actin, on the other hand, dissociates from myosin II, the head group, following each power stroke. As a result, the first option is the one that is correct.
Motor proteins with the ability to actively move along actin filaments and microtubules, respectively, are myosin and kinesin.
One of the two main groups of motor proteins that travel along the cytoskeleton's microtubules is kinesins. The two head groups of the kinesin molecule cooperate to move down the microtubule. One head binds to actin as the other moves; the first head then releases actin while the second head binds.
Myosin II, on the other hand, has a head group that functions independently and actin that dissociates after each power stroke.
As a result, the first option is the one that is true.
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"Dinosaurs first appeared and became the dominant terrestrial vertebrates. Birds first appeared, evolved from a branch of theropod dinosaurs. The first mammals also appeared but would remain small. Flowering plants appeared and would rapidly diversify throughout the period. "These are characteristics of which era?CenozoicPrecambrianMesozoicPaleozoic
The correct answer is MESOZOIC ERA
The Mesozoic era (middle life) is known as the age of dinosaurs in whcih they evolved from earlier reptiles in order to fill the niches on land, water, and in the air. This era was also where the mammals evolved but were in small size. Flowering plants also start to appear.
In which case is the energy involved farthest from being kinetic energy?A.random molecular movement B.light C.heat D.the energy in chemical bonds E.sound
A random molecular movement generates kinetic energy. Light and sound are not necessarily neither kinetic energy nor potential energy. Both can become kinetic energy if the right medium is used. Heat is another term for thermal energy and it can also produce kinetic energy if the right medium is used. The energy in chemical bonds is potential energy. If the bonds are broken down, the energy released will become kinetic energy.
ANSWER: D. The energy in chemical bonds
How can high temperatures disrupt dna replication? Help I need it asap
DNA is being denature with high temperature application. DNA's hydrogen bonds are disrupted by heat. The DNA flexibility is being boosted by heat thereby resulting to a condense folding of DNA chain (double-stranded). Due to this effect of destabilizing the DNA, the DNA duplex is entirely detached. Although DNA replication also requires heating, high temperatures (melting point) will greatly impact its replication. DNA extracted will give increase yield at lower temperature than in high temperature. Enzymes involved in DNA replication are affected by temperature. It can be denatured at high temperature and its actions will slow down at low temperature.
When cells are damaged, they release proteins called_____, which causes the area to become flooded with fluid and clotting elements.A. HistamineB. PathogensC. NeutrophilsD. Lysozyme
Answer:
Histamine ✨
Explanation:
Histamine is a compound released from cells. This histamine release is usually in response allergic and inflammatory reactions and injuries.
Histamine causes the contraction of smooth muscle and dilation of capillaries when released.
At the complete end of cellular respiration, how many molecules of ATP are produced?Question 20 options:A) 34B) 15C) 38D) 26
To answer this question we needd to remember how meny ATP, NAD and FAD are produced on each step of cellular respiration, so the account is a follows:
Glycolisis, 2ATP, 2NADH = 6ATP
Aerobic phase (krebs cycle, Acetil CoA), 4ATP, 2FADH, 8NADH= 32 ATP
Now we must remember that in glycolysis we spent 2ATP so the net production of the whole process is 38 ATP minus 2 ATP, which gives us 36ATP.
Therefore we can say that the correct answer is option C as 38 ATP are produced in total.
A man with type AB blood marries a woman with type A blood. Is it possible for them to have a child with type B blood? Use Punnett squares to support answer
No, it is impossible for them to have type B blood.
30) In a dideoxy chain-termination method, you added dideoxy cytosine only instead of dNTPs. What would be the outcome of your sequencing reaction? a) They will all be the same size and end in a G b) They will be of different sizes, all ending in a G c) No product will be formed d) They will be of different sizes, all ending in a C e) They will all be the same size and end in a C
If you add only cytosines instead of dNTPs, this means hat the sequencing would stop after tfilling all the terminal cytosines because it cannot add the other nucleotides needed, so you would end with fragments of different sizes, all of them ending in Cytosine (option d would be correct).
21.Myopia is connected withA. earsB.eyesC. lungsD.None of these
Myopia is a problem that affects vision because the image is not formed correctly.
Therefore, people with myopia have difficulty seeing distant objects/people.
Therefore, myopia is related to the eyes. The alternative "B" is correct.
A person with DMD had DNA that does not code for the proteindystrophymusclesduchenneO dystrophin
the answer is dystrophin
as dystrophin is protein found in cytoplasma
Explanation: In individuals with Duchenne muscular dystrophy (DMD), there is a mutation in the gene that codes for the protein dystrophin. Dystrophin is an essential protein involved in maintaining the structural integrity of muscle fibers. The mutation in the DMD gene results in the absence or severely reduced production of functional dystrophin protein.
As a result, without the production of dystrophin, the muscles in individuals with DMD gradually weaken and degenerate over time. This leads to progressive muscle weakness, difficulty in movement, and other associated symptoms of the disorder.
Select 3 that apply.The three types of segmented worms are _________, __________, and _________.leechesscallopspolychaetaoystersearthworms
The correct answer are leeches, polychaeta and earthworms. All of these are segmented worms.
What is a law?
A. A well-tested explanation as to why something occurs that is generally accepted
B. An assumption made about an experience
C. A scientific explanation for a set of observations that can be tested
D. A proven, universal truth that states what happens
Answer:
I would say D
Explanation:
A law is saying WHAT is happening
A theory is saying WHY it is happening
Answer: D. A proven, universal truth that states what happens
Explanation:
In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. Laws have not had any contradicting observations.
Identify your organism as a prokaryote or a eukaryote and give three reason why Organism : great white shark
Great white sharks are considered as the largest predatory fish. It is a eukaryote. It possess a true nucleus and the other membrane-bound organelles are present. It is composed of many cells with a nucleus and organells which is a characteristic of a eukaryotic organisms. Its nucleus stores the genetic information. Organisms with complex structures such as a great white shark is a eukaryote.
A prokaryotes lacks a nucleus and other organelles and divided into bacteria and archaea.
Which of the following choices is an example of a non-specific barrier?skinwhite blood cellslymphatic systemthe immune system
The defense system of the body
The skin is a non-specific barrier because it protects the body from non-especific pathogen agents, covering a major diversity of possible disease carriers.
Which part of the body is responsible for all high-level functioning and which part of the brain does that structure belong to? I picked ‘A’ but I’m not sure if I’m correct
Answer
Cerebrum, forebrain
Explanation
The cerebrum, the largest part of the human brain, is associated with higher order functioning. The structures in the forebrain include the cerebrum, thalamus, hypothalamus, pituitary gland, limbic system, and the olfactory bulb.
Cells are made of organelles, specialized structures that each perform specific functions that help the cell maintain homeostasis. This is much like the body systems work together to help the body maintain homeostasis. Consider each of the organelles and body systems paired below. Which pairs perform similar functions? Select ALL four that apply.
Responses
A integumentary system: cell membraneintegumentary system: cell membrane
B circulatory system: ribosomecirculatory system: ribosome
C digestive system: lysosomedigestive system: lysosome
D nervous system: nucleusnervous system: nucleus
E respiratory system: mitochondria
The body systems that match with the correct organelle are: (A) integumentary system: cell membrane; (C) digestive system: lysosome; (D) nervous system: nucleus; and (E) respiratory system: mitochondria.
Lysosome is the single membrane cell organelle that acts as the digestive system of the cell. It does so because it not only helps in the digestion of food particles, but also digests the foreign invaders so that the cell can protected from any kind of infections.
Nucleus is a cluster of neurons in the nervous system. Neurons are the cells that are basic unit of nervous system. Each neuron structure consists of cell body, with dendrites emerging from it. A long axon extends which has axon terminal at the end.
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Is Kudzu (the invasive species) an autotroph? Explain shortly Does it eat actual food?
Kudzu as an autotroph means that produces its own food (any inputo of energy is actueal food), in this case through photosynthesis, thanks to chlorophyll it captures light from the sun and along with CO₂produces the needed glucose to sustain energetic input in the cells. Another factor is the soil from which obtains nitrogen phosphorus and other minerals necessary to maintain cell function.
What is the overall goal of cellular respiration?
Cellular respiration is a way where the food that we consumed is being converted to energy out of sugar which is in the form of glucose. The organism is combining the oxygen with the food and diverting the energy and discarding carbon dioxide and water as its waste products. It occurs in the mitochondria of an animal or plant organisms. The overall goal of cellular respiration is to break down the sugar in the form of glucose with oxygen in order to release energy (ATP). ATP is the energy that the body can use for energy.