Cell differentiation is how generic embryonic cells become specialized cells. This occurs through a process called gene expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.
What are autosomes and allosomes Class 9?
Autosomes are all the chromosomes that are involved in any other function except for sex determination. The genes involved in sex determination are known as allosome.
How many autosomes and allosomes are present in human beings?
The chromosome is classified into two category autosome and sex chromosomes or allosomes. In humans, there are 23 pairs (46= 22 pairs autosomes + 2 sex chromosome) of the chromosome. But ovum is produced by the meiosis and hence have the half number of chromosomes i.e., 22 autosomes and 1 sex chromosome.
What are stem cells add a note on its culture types and its applications?
Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They have two unique properties that enable them to do this: They can divide over and over again to produce new cells. As they divide, they can change into the other types of cell that make up the body.
Why might Latinos descended from relatively recent immigrant groups have a higher fertility rate quizlet?
Why might Latinos descended from relatively recent immigrant groups have a higher fertility rate? They come from countries with a higher fertility rate, where having children is a cultural expectation.
Which of the following measures tells how many divorces there are in the United States relative to the total size of the population?
Which of the following measures tells how many divorces there are in the United States, relative to the total size of the population? A better “divorce rate” measure that compares how many divorces occurred in a given year relative to the number of married people in that year is: divorce rate.
What term is used to describe how well an organism functions in its environment a evolution B variation C fitness d selection?
Key termsTermMeaningVariationDifference between traits in individuals of the same speciesAdaptationA trait that improves an organism’s ability to survive and reproduce in an environmentFitnessThe ability of an organism to survive and reproduc.
How will this change in the environment most likely affect the mouse population the adaptation of thinner fur will be selected over thicker fur and?
The climate in which these mice live has slowly gotten colder. How will this change in the environment most likely affect the mouse population? The adaptation of thinner fur will be selected over thicker fur, and the population will remain unchanged.
How will this mutation most likely affect the deer population Brainly?
Due to a genetic mutation, a deer is born with a missing toe. This makes it difficult for the deer to escape from predators. How will this mutation most likely affect the deer population? The deer with the mutation will not survive, and the trait will disappear from the population.
Which of the following theory of mathematics is used by a CAD software in creating a perspective design?
Descriptive Geometry is a collection of guides and principles on how to accurately do technical drawing. This is before the time of modern computers with CAD software. Projective Geometry is a branch of mathematics that studies some properties about projection.
Which of the following method is also called as the slices method?
d) Spencer’s method. Explanation: Swedish circle method is also called as the method of slices and Fellenius method is a modified version of it. Swedish circle method assumes the condition of plain strain with failure along a cylindrical arc.
What is trimming an image?
The word Crop can be defined as “to trim” or “cut back”. The Crop tool in most image processing programs is used to trim off the outside edges of a digital image. Cropping can be used to make an image smaller (in pixels) and/or to change the aspect ration (length to width) of the image.
Which tool is used to remove the unwanted portion of an image?
A cropping tool is a tool that is used to remove undesired parts of a picture. This tool allows the user to crop the image to the desired size.
When we say an individual organism has a greater fitness than another individual we mean that?
when we say that an individual organism has a greater fitness than another individual, we specifically mean that the organism. leaves more viable offspring than others of its species.
Which of the following must exist in the population before natural selection can act upon that population?
The correct answer for question # eight is letter a genetic variation among individuals must exist in a population before natural selection can act upon that population.
Why is it that some organisms do not appear to be perfectly adapted to their environment?
Why is it that some organisms do not appear to be perfectly adapted to their environment? Because natural selection can only work on the variation present in a population.
How might a change in the environment affect natural selection?
If the environment changes rapidly, some species may not be able to adapt fast enough through natural selection. Through studying the fossil record, we know that many of the organisms that once lived on Earth are now extinct.
What is biodiversity discuss the genetic species and ecosystem diversity?
Biodiversity is a complex term that includes not only the variety of different animals (species diversity) but also the difference between animals of the same species (genetic diversity) and between ecosystems (ecosystem diversity).
Which conditions are necessary in order for natural selection to occur on a given trait in a population?
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
Why do you think it is necessary for there to be variation in a population in order for evolution by natural selection to occur?
Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species. the gene pool of a population over time, as a result of natural selection, genetic drift, gene flow, and mutation pressure.
Is Batman ever in Smallville?
Bruce Wayne/Batman finally appears in the Smallville continuity. Barbara Gordon makes an appearance, but takes on the crime fighting identity of Nightwing rather than her official pseudonym name “Batgirl” from the comics and mythology as.
Is Green Lantern in Smallville?
This episode introduces Smallville’s version of the Justice Society of America, and the super-guest cast consists of Hawkman, Stargirl, Doctor Fate, Star-Spangled Kid, Wildcat, Sandman, the Flash, Red Tornado, and Green Lantern. Also, the Martian Manhunter returns.
Is Bruce Wayne in Smallville?
He makes his first appearance in the second digital/print comic Smallville Season 11 story arc Detective and becomes a recurring character.
How does Batman look under the mask?
Designed specifically to drive fear into the hearts of criminals, Batman’s mask gives him an inhuman, almost demonic look. In movies, this look is enhanced by having the actor wear black makeup around his eyes, giving them a sunken look through the mask.
When a population is severely reduced by an environmental disaster such as a fire the result is a?
The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.
When a natural calamity results in the random killing of individuals in a population resulting in reduced genetic variability it called the blank?
Genetic drift can also be magnified by natural or human-caused events, such as a disaster that randomly kills a large portion of the population, which is known as the bottleneck effect that results in a large portion of the genome suddenly being wiped out ([Figure 2]).