Answer:
Given,
Colourless molecule is converted to black pigment by enzyme A. Black pigment is converted to agouti pigment by enzyme B.
Parent 1: AAbb = Black
Parent 2: aaBB = Colourless
AAbb X aaBB = AaBb (F1) The entire progeny is agouti coloured since dominant alleles for both the genes are present.
When AaBb X AaBb according to dihybrid cross in F2 :
A_B_ = 9 ( Agouti )
A_bb = 3 ( Black )
aaB_ = 3 ( Colourless )
aabb = 1 ( Colourless )
Hence genotypic ratio is 9 : 3 : 3 : 1
and phenotypic ratio is 9 (agouti) : 3 (black) : 4 (colourless)
The correct answer is that as the temperature have increased the range of the lionfish has changed.
The lionfish are native to the tropical waters of the Indo-Pacific region. The climatic change will increase the temperature of water and this will lead to the increase in the population of the fishes. As they live in tropical environment they are habitual of warm environment and some more increase in temperature will favor their growth.
The appropriate response is aponeurorrhaphy. Aponeurorrhaphy alludes to the stutured of an aponeurosis, which is the more profound and thicker band of stringy connective tissue appending muscles to bones. It is a strategy in which the solid sheet of tissue that fortified the patient's muscle to close-by bone.
Answer:
1) A chemical reaction is shown.
SnO2 + H2 → Sn + H2O
What is true about this chemical reaction?
B.
It is unbalanced because the mass of the reactants (number of atoms) is greater than the mass of the products (number of atoms).
2) Read the information about an experiment.
Jadon plans on carrying out an experiment involving the burning of steel wool to illustrate the conservation of mass. Steel wool is made of iron. When it is burned it combines with oxygen to form iron(III) oxide.
Which step in his experiment is the most important if he wants his experiment to correctly demonstrate the conservation of mass?
A.
The steel wool should be burned inside of a sealed jar or other closed system.
Explanation:
The explanation to number 1 is that I selected it in my test and got it.
The explanation the number 2 is from the link below:
https://quizizz.com/admin/quiz/5dee60258f1145001bc02ed5/physical-science-2nd-9-weeks-practice-test-2020
The correct answer to this question would be:
The microorganisms that make up the
normal human flora are important for <u>“preventing the colonization and multiplication of pathogens”.</u>
The human flora or human microbiota is
the totality of microorganisms which resides on or within our body. The normal flora of humans is composed of a few
eukaryotic fungi and protists, but bacteria are the most abundant and obvious
microbial components of the normal flora. The microorganisms of the
normal flora help the body fights against the pathogens by challenging for
microenvironments more effectively than such pathogens or by supplying
nutrients the body can use.
