i think A would be right if they are taking ab the scientific method
Epiglottis is a small, movable "lid" which is present just above the larynx which prevent food and drink from entering the windpipe.
It allows air to pass into the larynx and lungs.
Epiglottis is present just above the larynx which at rest allow passage of air to into larynx and lungs.
It is a movable lid that protect the air passage.
When a person swallows the epiglottis folds backward to covet the entrance of the larynx so that food and drink can not enter the air passage.
To know more about epiglottis :
The P generation is said to gave homozygous yellow and round seeds; homozygous green and wrinkled seeds. Homozygous means that they have the same alleles for the trait.
For the P generation the cross would be:
YYRR x yyrr
This means that all offsprings in the first generation (F1) would have a genotype of:
(Look at the Punnett attached to see this cross.)
The cross in the F1 generation would then be:
YyRr x YyRr
Now for yellow and wrinkled seeds to come out, the genotype should have at least one Y allele and a pair of r alleles. So the following genotypes is what you need to look out for:
So if you will count it you will find:
Yyrr = 2/16
YYrr = 1/16
Just add them up to get the probability:
a. all purple flowers in the F1 generation.
According to the given information, the allele for purple flower color (lets assume P) is dominant over while the allele of flower color (p). When two pure breeding purple (PP) and white flowered (pp) plants are crossed, the F1 would have all "purple flowered progeny with genotype Pp".
According to the Mendel's law of dominance, the hybrid genotype exhibits the dominant phenotype. Here, the allele "P" is dominant over allele "p". Hence, the genotype "Pp" would exhibit purple flower color and all the F1 progeny would have purple flowers.
Answer: i would say the independent variable is the soil and the control variable is the seed because it stays the same in all of them to better understand the experiment while the dependent variable is the fertilizer.
Explanation: i am not completely sure but maybe someone else can also answer to verify it first
Well, you see, the top layer looks a lot like connective tissue, so I would go for that one.
Answer: Connective tissue
Explanation: So, this is not exactly nervous or epithelial tissue. In all probability it is connective tissue
you can read the article
The total cross-sectional area of the blood vessels.
The total cross-sectional area of the blood vessels can increase/decrease the velocity of blood flow.
Hope this helps!
Feel free to ask if you have anymore questions!
The damage probably occurred at the infindibular stalk or the pituitary stalk that links the hypothalamus to the pituitary glands. If this were to happen, then there would be no communication between the two endocrine glands and the chemical signals affected will be tropic hormones. This is because the releasing hormones from the hypothalamus will not be able to reach the pituitary glands to stimulate the release of the secondary hormones. Tropic hormones are hormones which have other glands as their targets for example Adenocorticotropin Hormone (ACTH) that regulates how the steroid hormone cortisol is released by the adrenal glands. The picture below shows the pituitary stalk linking the hypothalamus to the pituitary glands.
all of these statement are true.they are multi functional mular cell of microcirculation.
Vascular mural cells buried in the basement membrane of blood microvessels are known as pericytes. They are present at intervals along the walls of blood capillaries.
So, the correct answer is option D) All of these statements are true.
Learn more about pericytes:-
Cells can be divided into 2 main categories. Eukaryotes(right side) and prokaryotes.
The facts about cells.
Cells are too small to see without a microscope.
There are two main types of cells.
1 Prokaryote were the earliest and most basic forms of life on Earth.
2 There are more bacteria in the body than in human cells.
3 Cells contain DNA.
4 Cells contain structures called organelles which have specific roles.
The four type of cells are :
1 Nerve cell.
2 Muscle cells.
3 Epithelial cells.
4 Blood cells.
5 Stem cells.
6 Fat cells.
Learn more about cells at