Answer:
About 95 percent of the skin cells in the epidermis are devoted to creating new skin cells in the lower two levels of the epidermis, which then cycle to the top layer to help form the stratum corneum. Eventually the dead cells of the stratum corneum flake off as new keratinocytes move up, and the cycle repeats itself.
Hope this answer is right!!
Describe the structure and function of the following organelles: nucleus, endoplasmic reticulum, Golgi body, mitochondria, lysosomes, ribosomes, and centrioles
Answer: A cell organelle is defined as a cellular structure which has a specific function. The structure and function of these organelles as explained below.
Explanation:
--> NUCLEUS: This is the largest and most important cell organelle. It is enclosed by a double- layered nuclear membrane with many pores. The structure of the Nucleus makes it the 'control center' of the cell. This, it contains genetic materials( chromosomes) which controls the Production of a new cell or the whole organism itself and it controls the type and quantity of proteins( enzymes) produced in the cytoplasm.
--> ENDOPLASMIC RETICULUM(ER): this is a system of membrane-lined sacs that form channels throughout the cytoplasm. It's membrane is continuous with the nuclear membrane. There are two types of endoplasmic reticulum: rough and smooth. The rough ER packs and transports proteins made by ribosome while the smooth ER is involved in lipid and steroid synthesis.
--> GOLGI BODY: This is a stack of membrane-lined sacs. It is continuously formed at one end and broken off as bubbles or vesicles at the other end. These vesicles carry 'export materials' like enzymes and hormones which the cell makes.
--> MITOCHONDRIA: This is a sausage-shaped body surrounded by a double-membrane layer. The inner membrane is folded to form partitions which project into the inside of the mitochondria. The energy producing reactions of cellular respiration take place in the mitochondria. It is thus often called the cell's 'power- house'.
LYSOSOMES: These are small round sacs that contains digestive enzymes which break down structures and substances. They are also involved in the transport of materials in and out of the cell.
RIBOSOME: These are found on the surface of rough endoplasmic reticulum and are sites for protein synthesis of the cell.
CENTRIOLE: Two rod-like centrioles are found at right angles to each other in an animal cell. They are found near the nucleus and seem to be concerned with cell division.
Which of the following statements is correct regarding engineering maize plants with a herbicide-resistance gene using Agrobacterium-mediated plant transformation?
a. The Ti-plasmid used for this experiment must contain tumor-inducing genes.
b. The herbicide-resistance gene is cloned into the T-DNA region of the Ti-plasmid.
c. The herbicide-resistance gene is cloned into a region outside of the T-DNA in the Ti-plasmid.
d. A guide RNA is used to transfer T-DNA from Agrobacterium to the plant cell.
e. The whole Ti-plasmid containing the herbicide-resistance gene is inserted into the maize genome after infection with Agrobacterium
Answer:
b. The herbicide-resistance gene is cloned into the T-DNA region of the Ti-plasmid.
Explanation:
Ti-plasmid has the ability to introduce part of its DNA (t-DNA) into the genome of host plants. This is very important for the relationship of genetic manipulation in maize plants, with the aim of inducing a gene that promotes herbicide resistance. In addition, T-DNA has many genes that code for the production of plant growth phytohormones, which is extremely important for the cloning process to work. In this case, we can assume that the correct answer for yours is the letter B.
In the SDS-PAGE (sodium dodecylsulfate - polyacrylamide gel electrophoresis) method, separation takes place on the basis of:_____________
a. charge only, because all particles have different charges, but the same mass.
b. the sieving action of the gel, because all particles have the same charge, but different masses.
c. the sieving action of the gel, because all particles have approximately the same charge/mass ratio, but different masses.
d. the chemical nature of the buffer used as the electrolyte.
Answer:
B
Explanation:
Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) is a method of separating molecules based on the difference of their molecular weight.
Phân tích chức năng của các hệ cơ quan chính ở cơ thể cá; các biểu hiện
rối loạn chức năng và ứng dụng các biện pháp kĩ thuật nhằm năng cao
năng suất nuôi trồng thủy sản
Answer:
Nâng cao kiến thức về hệ thống miễn dịch niêm mạc cá sẽ tạo điều kiện cho ... Tuy nhiên, có một số thách thức quan trọng để phát triển năng suất, ... Đầu tiên, kết quả thu được trong những năm đầu sẽ được phân tích, và điều này ... cơ quan và liên tục với các lớp lót của tất cả các lỗ trên cơ thể và cũng bao phủ các vây. và Cá cũng có thể sửa đổi cấu trúc mang để đáp ứng với độ mặn, thiếu oxy, hoặc axit hóa ... chưa rõ ảnh hưởng đến sức khỏe biển và sản lượng nuôi trồng thủy sản. ... để mở các hệ thống trong đó chất lượng nước là một chức năng trực tiếp của môi trường.
What was one major effect of urbanization on British society during the
Industrial Revolution?
O A. Urban citizens were forced to drink unsanitary and polluted water.
B. Improved living conditions resulted in a decline in the mortality
rate.
O C. Governments passed strict regulations to reduce the levels of
pollution.
D. Wealthy corporations relocated their factories to rural areas.
Answer:
B is the answer
B. Improved living conditions resulted in a decline in the mortality
rate.
Hope it helps
The major effect of urbanization is improved living conditions resulted in a decline in the mortality rate during industrial revolution.
What is industrial revolution?The Industrial Revolution was the shift to new industrial methods in the United Kingdom, continental Europe, and the United States from around 1760 until between 1820 and 1840.
The major effect of urbanization is improved living conditions resulted in a decline in the mortality rate during industrial revolution.
Thus, the correct option is B.
For more details regarding industrial revolution, visit:
https://brainly.com/question/855594
#SPJ2
What is a sacrolemma?
Answer:
the fine transparent tubular sheath which envelops the fibres of skeletal muscles.
Explain how sunlight is the primary source of energy for your own life
Answer: ok...
Explanation:
The continual input of energy, mostly from sunlight, sustains the process of life. Sunlight allows plants, algae and cyanobacteria to use photosynthesis to convert carbon dioxide and water into organic compounds like carbohydrates. This process is the fundamental source of organic material in the biosphere.
Name three different cells in a leaf that contain chloroplast. Please help
The LEAF as a photosynthetic organ includes the following cells which contains CHLOROPLASTS
• the palisade mesophyll
• the spongy mesophyll and
• the stomatal guard cells
The LEAFS are the main organ of photosynthesis. Photosynthesis is the process by which green plants manufacture their food in the presence of sunlight. This takes place in the CHLOROPLASTS of these plant. CHLOROPLASTS are structures that contains chlorophyll which traps in energy from the sunlight.
The mesophyll tissues are located between the upper and the lower epidermis of the leaf. The palisade mesophyll, which is found at the upper part, contains numerous CHLOROPLASTS and is the main site of photosynthesis in the leaf.
The spongy mesophyll is located at the lower part of the epidermis. They are irregularly arranged with air spaces between them which are linked to the stomatal openings. They also contain CHLOROPLASTS.
The stomatal guard cells are a pair of bean-shaped cells which controls the opening and closing of stomata. These cells contains CHLOROPLASTS which contributes to the movement of stomata.
Therefore the three different cells of the leaf that contains CHLOROPLASTS are the palisade mesophyll, the spongy mesophyll and the stomatal guard cells.
You can read more about CHLOROPLASTS through the link below:
https://brainly.com/question/20092825
A plant can have green (G) or yellow (g) leaves. It can also have a long (K) or
short (k) stem. A scientist is preparing a Punnett square for a dihybrid cross
of a plant with a genotype GGKk. What possible gametes can the plant
produce?
What is a working copy of DNA that leaves the nucleus of the cell? And is read by organelles called that connect amino acids together to make proteins
Answer:
Messenger RNA
Explanation:
6) In Medieval times a ruler told the peasants that they were free to take anything from the forest that had fallen, branches, trees, leaves etc. But they were not to take any live standing trees. Within a few years the forest was dying. Why
Answer:
Due to lack of nutrients in the soil.
Explanation:
Within a few years the forest was dying because there is no nutrient is present in the soil which can trigger the growth and development of the sol. The fallen parts of trees such as branches, tree and leaves etc are decomposed by decomposers such as bacteria and fungi which turn the fallen materials into nitrogenous materials which can be used by the plant for its growth and development.
Write any two demerits of local system of measurement.
Answer:
) It's easier for younger people to change than older people. (3) It ignores, and devalues cultural differences, expressions, and idioms, based on imperial measurements. For example: can a British pub be truly British without "Pints of beer"? - "Half a litre of beer" doesn't quite have the same ring to it!
1. cannot be used in international trade.
2. cannot be used in scientific experimemts.....
The fact that _____ is electronegative gives a water molecule a partial positive side.
Answer:
Oxygen
Explanation:
In a molecule of water ie H20, Oxygen is more electronegative and hence attracts more electrons to itself making Hydrogen partially positive ♂️
Why do v sneeze
plz explain it step by step
Clear-cutting and logging of tropical rain forests causes issues with excess carbon dioxide in the atmosphere and low rainfall. The land that is cleared and used for farming become depleted of nutrients and thus are useless. Do we have any right to tell other countries how to manage their lands, such as rain forests? If we explain the consequences of clear-cutting the rain forests but that government decides to continue with the process, should we interfere?
Answer:
yes cause those tropical rain forests are important
Explanation:
All of the following are examples of the functions of connective tissues except
Answer:
can you please show the options
In convergent evolution, unrelated species or different organisms evolve similar traits, even though they live in different parts of the world.
Answer:
True
Explanation:
Convergent evolution is a type of independent evolutionary process by which unrelated species evolve similar structural features/traits that fulfill the same or similar functions. Convergent evolution generates analogous structures, i.e., structures that have similar functions in organisms that don't share a common ancestor with such phenotypic traits. An example of convergent evolution is the wings of insects (e.g., butterflies), birds and bats. Conversely, divergent evolution is a type of evolutionary process that creates homologous structures/traits in closely related organisms because such features were inherited from a common ancestor.
What would you say is the most significant result of the technology revolution in archaeology ?
Answer:
Improvement of preservation techniques.
Explanation:
The most significant result of the technology revolution in archaeology is the improvement of preservation techniques used for archaeological sites. Modern technology also allows researchers to go to a site in order to find out the answers of additional questions. Modern archaeologists are fighting climate change, discovering how cultures evolved with the passage of time, and using technology to better understand human evolution.
2
Organism A
Offspring 1
Offspring 2
The diagram below represents a form of cellular reproduction
Fi
As a result of this process, offspring 1 and offspring 2 will have *
(2 Points)
Answer: A
Explanation:
they will have different traits because they will each have different dna but the same amount of genes
Offspring 1 and offspring two will have the same number of genes but different traits. So, the correct option is A.
How the same number of genes?When a sperm fertilizes an egg cell, each parent contributes 23 chromosomes with genetic information to the offspring. This means that each cell of the offspring's body has 23 chromosomes that contain instructions for their development, including their traits.What are the different traits?Parents pass on traits, such as eye color and blood type, to their offspring through their genes. Some health conditions and diseases can be passed on. Sometimes, one characteristic has many different forms. For example, blood type can be A, B, AB, or O.Eye color is based on the amount of pigment melanin in the iris. Every gene has an allele from its parents, so many variations are possible. Because of this, even if parents have blue eyes, offspring can have brown or green eyes, or one offspring can have blue, and others can have different eye colors from their family.Thus, we can conclude that two offspring will have the same genes but different alleles.
You can learn more about traits here:
https://brainly.com/question/26434916
#SPJ2
In which season(s) are the most populations limited in Mono Lake?
Answer:
Mainly winter i think
Explanation:
why it is important that we have an understanding of geologic time
Answer:
Time is a very important variable in geology because the exact timing of spatially separated events allows us to reconstruct the surface and surface conditions of the ancient earth. Geologic time spans are considerably more difficult to comprehend than historical time spans because they are so incredibly long.
One reason is so that we can fully understand how geological processes that seem impossibly slow can produce anything of consequence. For example, we are familiar with the concept of driving from one major city to another: a journey of several hours at around 100 km/h. Continents move toward each other at rates of a fraction of a millimetre per day, or something in the order of 0.00000001 km/h, and yet, at this impossibly slow rate, they can move thousands of kilometres. Sediments typically accumulate at even slower rates — less than a millimetre per year — but still they are thick enough to be thrust up into monumental mountains and carved into breathtaking canyons.
Another reason is that for our survival on this planet, we need to understand issues like extinction of endangered species and anthropogenic (human-caused) climate change. Some people, who don’t understand geological time, are quick to say that the climate has changed in the past, and that what is happening now is no different. And it certainly has changed in the past. For example, from the Eocene (50 Ma) to the present day, Earth’s climate cooled by about 12°C. That’s a huge change that ranks up there with many of the important climate changes of the distant past, and yet the rate of change over that time was only 0.000024°C/century. Anthropogenic climate change has been 1.1°C over the past 100 years, and that is 45,800 times faster than the rate of natural climate change since the Eocene.
Hello ! I need to make on Poetry about the snake to make everything what I know about him , means were it lives , what his ears , what is look like , different colour,there is venomous,etc , some on can help me please? Thank you
Answer:
try to explain a little more of exactly what you need. a poem about a snake am I correct?
Increasing __________ is one of the most effective treatments for bowel and bladder problems.
Science is concerned with explaining natural phenomena, based on observation, experiments, and evidence. Other questions are best answered by using other forms of knowledge and understanding, such as art, philosophy, or religion. Read each topic and select the topics for Science.
Select ALL that apply.
behavior of alligators
meaning of existence
black holes
deep-sea vents
the Aurora Borealis (Northern Lights)
ghosts, goblins, and other creatures in stories
Answer:
These:
Explanation:
behavior of alligators
black holes
deep sea vents
the Aurora Borealis
Any event or an occurrence that happens on its own without any human intervention is termed as a natural phenomena.
Natural phenomena harms the nature as well as life on earth.
Common examples of natural phenomena include thunder storms, earthquakes, landslides, volcanic eruptions, hurricane etc.
Some majestic natural phenomena include blood rain, Northern lights and luminous water in the world.
Natural phenomena can sometimes be destructive in nature and are therefore responsible for loss of lives and property.
It is almost impossible to predict the occurrence of any natural phenomena.
However, the negative outcome of natural phenomena can be managed with special disaster management operation
Thus, natural phenomena could only be observed and understood in science.
Learn more about natural phenomena, here:
https://brainly.com/question/28585198
#SPJ2
A group of organ systems makes up a
Answer:
Organs are grouped into organ systems, in which they work together to carry out a particular function for the organism. For example, the heart and the blood vessels make up the cardiovascular system.
Explanation:
A dialyzing machine has a membrane that is permeable to water, urea, uric acid, ammonia, salts, and
glucose. The membrane is impermeable to protein molecules. In relation to the blood flowing
through the dialysis machine, the dialyzing solution must have:
a. the same concentrations of urea and salts
b. lower concentrations of glucose and protein
c. lower concentrations of urea, uric acid, and ammonia and higher or equal concentrations of glucose
d. higher concentrations of urea, uric acid, and ammonia and lower or equal concentrations of glucose
Answer:
C. lower concentrations of urea, uric acid, and ammonia and higher or equal concentrations of glucose
Explanation:
Hope it helps!!!
PLEASE HELP ASAP!!!!!
Answer:B andC
hope it helps
3.3
Predict the possible genotypes of offspring if two roan heterozygous
polled cattle were mated
Answer:
RR, Rw, Rw, ww
Explanation:
Rw
R
w
RR, Rw, Rw, ww
The phenotypes would be 1 Red, 2 Roan, and 1 white, assuming the colors of roan are white and red and red is dominant white is recessive, hope that helps!
cual es la causa para que los oceanos se expanden entre 3 y 10 cm por año
Answer:
El calentamiento global causa que el nivel del mar se eleve, debido a que el hielo en las plataformas continentales se derrite y que el agua del océano se expande al calentarse.
Count the number of breaths you take in a minute and compare it with the number of times a fish opens and closes its mouth
Answer:
Don't know sorryyyyyyyyyyyyyyyyyyyyyyyyyyyyy
