Answer:
From mother to child.
Unprotected sexual intercourse.
Sharing of sharp objects.
Unscreened blood transfusion.
Contact with body fluid of an infected person
the threadlike structures that contain genes are called
Answer:
Chromosome are the threadlike structures that contains genes.
Which is mixed with proteins to break them into amino acids?
Answer:
enzymes can breakdown proteins into amino acids
Answer: hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids
Explanation:
The enzyme that builds the complimentary strand during replication.
helicase
replicase
polymerase
synthase
Answer:
polymerase
Explanation:
It wraps itself around a polynucleotide strand and attaches new nucleotides to the exposed nitrogenous bases
When an infant suckles at its mother's breast, milk moves through the breast structures in what order
When an infant suckles at its mother's breast, milk moves through the breast structures in the order
Acinus - lactiferous duct - lactiferous sinus - nipple
When an infant suckles, milk is secreted from lactocytes into the alveoli (acinus). The milk is then squeezed from the alveoli so it can drain into the lactiferous ducts, milk drains from lactiferous ducts into lactiferous sinuses, and discharge through the nipple pores.
Hence, when an infant suckles at its mother's breast, milk moves through the breast structures in the order
Acinus - lactiferous duct - lactiferous sinus - nipple
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According to the text, adolescents are deficient in their intake of necessary vitamins and minerals because _____
Answer:
healthy foods cost more.
unhealthy foods are more desirable.
they eat from vending machines in schools.
All of these answers are correct.
Explanation:
What is meant by industrialization ?Write in brief
7. Where do the light-dependent reactions take place?
Answer:
in the chloroplasts I think that's how u spell it
true or false
plant cells have chloroplasts but animal cells don't
Answer: Very True!!!
Explanation:
Answer: Its True.
Have a great day/night!
there are many kinds of organisms in kingdom protista. which organism is in kingdom protista?
If a label indicated the presence of a radioactive isotope, you would know what
about the substance?
Answer:
Radioisotopes are radioactive isotopes of an element
Explanation: Radioactive isotopes are detected by: photographic film.
a cloud or bubble chamber.
a liquid scintillation detector.
a Geiger-Muller counter.
Answer:
we would know that the substance's atoms have an unstable combination of neutrons and protons or excess energy in their nucleus.
Based on their locations on the periodic table, which best compares the properties of the metalloids arsenic (As) and
antimony (Sb)?
Arsenic has a more metallic behavior than antimony because arsenic's atoms have fewer electron shells.
O Arsenic has a more metallic behavior than antimony because arsenic's atoms have more electron shells.
Arsenic has a more nonmetallic behavior than antimony because arsenic's atoms have more electron shells.
Arsenic has a more nonmetallic behavior than antimony because arsenic's atoms have fewer electron shells.
Answer:
Arsenic has a more metallic behavior than antimony because arsenic’s atoms have more electron shells.
Explanation:
the person above me is wrong
What is the first indication of a Tsunami?
Answer:
Ground shaking or loud ocean roar
The Smiths went to dinner at Cheesecake Factory and their bill was $123.75 plus 7.5% sales tax. What is the total bill? Round to the nearest cent.
The total bill that was given to the Smiths at the Cheesecake factory was $133.03
An equation is an expression used to show the relationship between two or more numbers and variables.
Given that the Smiths bill was $123.75 plus 7.5% sales tax. Hence:
Total bill = $123.75 + Sales tax
Sales tax = 7.5% of bill = 0.075 * $123.75 = $9.28
Total bill = $123.75 + $9.28 = $133.03
The total bill that was given to the Smiths at the Cheesecake factory was $133.03
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pls helpppppppppppp it's due today
Answer:
The coreect answare would be B
Answer:
A is upper epidermis
B is palisade cells
C is spongy mesophyll layer
D is the lower epidermis
Explanation:
i hope this is helping
why is there no enzyme to digest vitamins
Answer:
Vitamins are used in their original form by the cells. They are either water soluble or fat soluble, hence no enzyme is required to digest vitamins. They are absorbed directly from the digestive tract, transported by blood to the cells, and the cells absorb and use them whenever they need.
A dog who inherits an allele for
curly hair and an allele for straight
hair has curly hair because the
allele for-
E. curly hair is recessive.
F. curly hair is dominant.
G. straight hair is dominant.
H. curly hair is inherited from both
parents.
14. Which of the following occurs during the electron transport chain?
a. the formation of ATP by oxidative phosphorylation
b. the formation of water
c. a concentration gradient of protons
d. all of the above
Answer:
All
Explanation:
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.
Answer:
D
Explanation:
ATP is created in the ETC
Water is formed as a by product
The concentration gradient is what fuels the ETC. Protons (H+ ions) move across the membrane to create energy.
Hope that helps (and also hope its right, i did bio a while back)
Homeostasis is necessary for a cell to survive. What is the definition of homeostasis
Answer:
Homeostasis is the process of maintaining a constant internal environment suitable sustaining life.
Homeostasis continues to maintain ideal environment for enzyme action and all cell functions throughout the body.
Why homeostasis is necessary?It is the preservation of a constant internal environment in the face of changing internal and external conditions. These include blood glucose concentration control in the human body.
A series of control mechanisms at the organ, tissue, or cellular level maintain homeostasis.
Substrate supply, activation or inhibition of individual enzymes and receptors, enzyme synthesis and degradation, and compartmentalization are examples of control mechanisms.
The liver, pancreas, kidneys, and brain (hypothalamus, autonomic nervous system, and endocrine system) all contribute to homeostasis.
The liver is in charge of metabolizing toxic substances and maintaining carbohydrate metabolism with pancreatic signaling.
Thus, homeostasis is necessary for a cell to survive.
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where might we see changes in concentration in nature and how could these changes affect living organisms?
Answer:
Explanation:
Any change in the climate of an area can affect the plants and animals living there, as well as the makeup of the entire ecosystem. Some species are already responding to a warmer climate by moving to cooler locations. ... Climate change also alters the life cycles of plants and animals
The first fuel Paul’s body uses is ________________________ from Paul’s last meal, which are stored in his _____________ & his ______________ (technically the bits in his BLOOD are used up before that even). The body turns them into ____________, which is burned in ____________. That fuel lasts Paul about ________________.
1. The first fuel Paul’s body uses is carbohydrate, which is generated from Paul’s last meal.
2. These carbohydrates are stored in his liver and muscles (technically, the bits in his blood are used up before that even).
3. The body turns the carbohydrates into glucose, which is burned in mitochondria during an aerobic cellular respiration.
4. That fuel lasts Paul about 3 miles, 40 minutes ([tex]\frac{2}{3} \;hours[/tex]).
A fuel can be defined as the resources that power the body of a living organism such as a human being. Also, the three (3) main types of fuel that power the human body include the following:
OxygenWaterFoodFat is a nutritional element of food and it is beneficial to the body of a living organism because after the body exhausts its carbohydrates, it then uses its own fat as a fuel to power the body.
In this context, the first fuel Paul’s body uses is carbohydrate, which is generated from Paul’s last meal. These carbohydrates are stored in his liver and muscles (technically, the bits of carbohydrates in his blood are used up before the storage).
Furthermore, the body turns the carbohydrates into glucose, which is burned in mitochondria during an aerobic cellular respiration. Also, the fuel would only last Paul for a distance of about 3 miles, 40 minutes ([tex]\frac{2}{3} \;hours[/tex]).
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Using 3-5 sentences explain how human activties can affect climate change.
Answer:
Human activities can affect climate change because of just how much waste we produce. One huge example is our burning problem, which slowly strips away at the ozone layer that protects animals from heat and melting snow. Because of the ozone layer, the arctic has been protected for many years but now it's slowly disappearing, melting ice and killing animals who have not learned to survive in such hot weather. Another example is when humans cut down too many trees to sustain the environment; it often causes a massive lack in natural oxygen and unroots many homes of small critters and worms. In conclusion, humans can heavily affect climate change because of our ignorance and how we refuse to learn for the future.
Explanation:
What process is the "copying" portion of protein synthesis? What is being copied? Why does it have to be copied?
The process of protein synthesis is known as translation. During this process, the mRNA is being copied into an orderly sequence of amino acids to produce a polypeptide.
During gene transcription, a fragment of DNA called gene is used as a template to generate a complementary messenger RNA (mRNA) sequence.
Afterward, this mRNA will be used as a template to create a protein by a process called translation.
The linear order of triplets of nucleotides or codons in mRNA will be used to add ordered amino acids to the growing polypeptide chain (i.e., the protein).
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_______________________ are the components of most non-clastic rocks.
Dissolved minerals
Sediment and small rocks
Seashells
Limestone and fossils
Clay and pebbles
Angled rocks and clay
Answer:
Limestone, dolomite and chert.
AKA Limestone and fossils.
Chert is of biological origin and limestone is composed of tiny fossils. Dolomite is a form of limestone. Non-clastic sedimentary rocks are formed organically.
predict the average number of different trna molecules that can be recognized by a single type of aminoacyl trna synthetase.
Answer: Each tRNA is charged with a particular amino acid at its 3' end. Although there are 61 codons in the universal genetic code that specify amino acids, most organisms posess fewer than 45 different tRNAs.
Explanation:
The equator has light closer to 90 degrees, at the poles the angle is lower than 90 degrees. Use this information and refer to the data from Table B to explain why the tropics (near the equator) are hotter than the arctic region (north/south poles). Be sure to include data from Table B in your answer.
The temperature at tropic region is warmer than the polar temperatures due to angle of the sun.
The tropics which is located near the equator are hotter than the arctic region i.e. north and south poles because the sunlight falls directly on the tropic regions at 90 degrees while on the other hand, the sunlight falls on the poles not directly and form angle lower than 90 degrees.
The amount of solar energy in a given area is greater at the equator and tropic regions than in an equal area at the poles so that's why the temperature at tropic region is warmer than the polar temperatures.
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it can be said that all cells life begin and end with this process ?
Replication
Meiosis
Mitosis
Cytokinesis
all cells life begin and end with this process by the process of meiosis
What is meiosis ?
Meiosis is the process where a single cell divides twice to produce four four haploid daughter cells which are otherwise called as gametes; It can occur in two substages such as meiosis I and meiosis II.
Humans have 46 chromosomes in every cell, where 23 chromosomes t came from one of our parents and 23 very similar chromosomes that came from the other parents.
Meiosis I consist of substages like Prophase I where nuclear envelope disintegrates, Chromosomes begin to condense, Spindle fibres appear.
Secondly Prometaphase I where Spindle fibres attach to the centromere followed by Metaphase I where The homologous chromosomes align at the equatorial plate, Anaphase I where he homologous chromosomes move towards the opposite poles.
Telophase I where Spindle fibres disappear, Cytokinesis I where the cytoplasm and the cell division result in 2 non-identical haploid daughter cells.
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the folded organelle just outside of the nucleus that is covered in ribosomes and plays a role in protein synthesis is called the:
Answer:
endoplasmic reticulum (ER)
Explanation:
system of layout refers to the design of planting trees
true or false
[tex] \: \: [/tex]
TRUEsystem of layout refers to the designs of planting trees.it is desirable planted in a systemic wayhope it helps3. The fact that the genetic code is universal suggests that:
A. All organisms evolved from separate original ancestors.
B. Life forms have a common evolutionary ancestry.
C. Protein makes up the genetic material.
D. Evolution does not really occur.
Answer:
B. Life forms have a common evolutionary ancestry.
Explanation:
A. All organisms evolved from separate original ancestors.
-> We know this is not true. If organisms evolved from separate ancestors, they would have different genetic code.
C. Protein makes up the genetic material.
-> This was proven false in Hershey–Chase experiment.
D. Evolution does not really occur.
->This one's obviously false as speciation happens regularly.
The coat that surrounds the genetic material of a virus is made of what material? (
1 point) protein, cells, RNA, DNA
Answer:
Protein
Explanation:
The protein-covered coat that surrounds the genetic material of a virus is called a capsid.There are mainly three structural shapes of a capsid : Icosahedral ProlateHelicalThe functions of capsid includes:Protection of viral genome i.e., either DNA or RNA from dissolution.Helps in penetration of virus in host cells.For More Information:
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Answer:
the answer is protein
Explanation: