Answer:
ectoderm
Explanation:
The cell layer that differentiates and forms the body’s internal structures, such as bones and muscles, is mesoderm, which is present in Option A, as during embryonic development, the mesoderm layer forms from the middle layer.
What is mesoderm?During embryonic development, fertilized egg goes through a series of processes that result in the formation of an organism, followed by the formation of the three primary germ layers, which are the ectoderm, mesoderm, and endoderm, from which various tissues and organs in the body are formed, such as the mesoderm, that is the middle layer where muscle, bone, cartilage, and blood are formed.
Hence, the cell layer that differentiates and forms the body’s internal structures, such as bones and muscles, is mesoderm, which is present in Option A.
Learn more about the mesoderm here.
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The question is incomplete, complete question is below
Which cell layer differentiates and forms the body’s internal structures such as bones and muscles
A)mesoderm
B)ectoderm
C)endoderm
In a DNA molecule, G pairs with __
Answer:
cytosine
Explanation:
Guanine is one of the building blocks of DNA. It's the G in the A, C, G, or T. Guanine in the double helix pairs with cytosine, so you will see CG pairs; one on one strand and one on the other.
Answer:
In a DNA molecule, G pairs with C
Explanation:
Wish you luck! Have a good day~
Which of these events occurs first during the process of transcription?
A. RNA polymerase joins nucleotides into the RNA molecule.
B. RNA polymerase binds to the promoter.
C. Introns are removed from the RNA molecule.
D. Exons are removed from the RNA molecule.
Answer:
B. RNA polymerase binds to the promoter.
Arrange the terms in the correct order:
tissue, organism, organ, cell, system
Answer:
cell, tissue, organ, system, organism
Explanation:
What is the official language of Peru?
Portuguese
Spanish
Dutch
English
Answer:
Spanish
Explanation:
ESP: actuan las hormonas solo sobre celulas o pueden actuar sobre otras estructuras?
ENG: do hormones act only on cells or can they act on other structures?
Answer:
Hormones act only on cells not structures.
Explanation:
Hormones act only on cells and they do not act on other structures because there are specific cells have receptors for that particular hormone. Some hormones bind itself to the receptors on the surface of target cells whereas other hormones enter the cells and bind itself to the receptors present in the cytoplasm or nucleus of the cell.
1. The Earth experiences days and nights due to the:
a. revolution around the sun.
b. tilt of Earth.
c. rotation on it's axis.
Choose the correct answer not cutt
Answer:
c. rotation on it's axis
Pretty please help!!!
what would happen if scientific knowledge was not adaptable
there where no more correct solutions, they would be wrong, since the scientific method establishes relationships between facts, where it is a useful application for man.
Answer for 10 points!
Answer:
I think the answer is D
Explanation:
Hope that helps!
If you throw a rock into the air, its instantaneous speed is probably highest
A) at the top of its flight
B) halfway to the top of its flight
C) when you throw it and right before it hits the ground
D) when you throw it
E) right before it hits the ground
Answer:
B halfway to the top of it's flight
What is better for a beginners pet leopard gecko or crested gecko
Answer:
leopard gecko
Explanation:
Answer:
you chose based off what i type
Explanation:
crested geckos need a vivarium and a uvb light but turn it off at night cause they are nocturnal they need stuff to climb on a hide and a clean cage the eat a powder mixed with water and crickets you can give them other bugs to they can jump from your hand to your arm if they want to they will drop there tail if scared they do not grow back also super cute
leopard geckos need a 20 gallon or bigger terrarium with uvb to turn off at night and a heat pad 24\7 make sure its no to hot leopard geckos need a variety of bugs like crickets and bubia roaches and other and a clean tank and at least 2 hides they will drop there tail but they do grow back they just look a little different but are super cute
Consider a plant with the following characteristics. Round leaves (R) are dominant to pointed leaves (r). White flowers (W) are dominant to pink flowers (w). Plants heterozygous for both traits are crossed. What is the probability of obtaining a plant with pointed leaves and pink flowers
Answer:
.0625 or 6.25%
Explanation:
Find the probability for the plant to have pointed leaves. If the two parent plants are heterzygous, then the likelihood the plant has a recessive characteristic is 25%, 1/4, or .25 for our calculations.Find the probability for the plant to be pink. If the two parent plants are heterzygous, the likelihood the plant has another recessive characterisitc is again 25%, 1/4, or .25 for our calculations.Multiply them together. (1/4)*(1/4)=(1/16) or .0625, or 6.25%helppppppppppp meeeeeeee
1. How do plants get the raw materials for photosynthesis?
Answer:
they absorb water and minerals from the soil and use the energy of the sun to synthesize sugars (carbohydrates)
What can you tell about bacteria that have been Gram stained?
A) Microscopic morphology
B) Macroscopic morphology
C) Gram reaction
D) A and C
Answer:
D) A and C
Explanation:
Gram staining is a laboratory technique used for bacterial species. It is used to differentiate between two groups of bacteria based on the components of their cell wall. Gram staining was developed by a scientist called Christian Gram in the year 1884. In the gram stain procedure, the following occurs:
- Due to the thick peptidoglycan component of their cell wall, GRAM POSITIVE bacteria retains the crystal violet due and stain VIOLET.
- On the contrary, due to the thin peptidoglycan component of their cell wall, GRAM NEGATIVE bacteria do not retain the crystal violet dye and hence stain, RED.
Based on this, a bacteria that has been gram stained has been tested for its GRAM REACTION and microscopic morphological characteristics, since it is a microbe.
In cats, some are black, some are orange, and some are calico (fur that is both black and orange) All calico cats are always females. This trait represents two inheritance patterns. This two and explain how you know.
please help.
Calico cats are predominantly female because they’re colouring is related to the X chromosome.
Two X chromosomes are needed for a cat to have that distinctive tri-colour coat.If a cat has an XX pair, she will be female.Male cats have an XY chromosome pair, so they can’t be Calicos.Have a great day <3 (I love cats)
Answer: In cats, one of several genes controlling fur color is located on the X chromosome. The gene has two versions, or alleles. One form of the gene codes for orange fur (XB), and the other form codes for black fur (Xb). While it's difficult to say which allele is dominant and which is recessive, since only one is ever expressed (see below), let's say, for the sake of argument, that orange is dominant to black. Ordinarily, this would mean that an animal inheriting one copy of each gene (genotype XBXb) should have orange fur. Surprisingly, a female cat heterozygous at that locus (XBXb) will not be orange. Instead, her coat will be a patchwork of orange and black, a condition known as tortoiseshell. Male color expression is straightforward. Because only one allele exists for the gene in each cell, it will be expressed. And all males have only B or only b. There are no heterozygotes, because the Y does not carry the allele.
Explanation:
I got this from an article! I hope this helps.
what comes first mieosis or mitosis
Answer:
I'm not sure there's a first exactly, but if I had to guess I'd say mitosis.
Explanation:
Meiosis produces genetically identical cells, results in diploid cells and takes place throughout an organism's lifetime; involved in asexual reproduction. Meiosis produces genetically unique cells, results in haploid cells, only happens at curtain times in an organism's life cycle; involved in sexual reproduction.
Consider a cross between a plant with two flower colors, yellow and red. Yellow (Y) exhibits complete dominance over red (y). It also has either single blossoms or double blossoms, single blossoms (S) exhibit complete dominance over double blossoms (s). A dihybrid yellow, single blossomed flower is crossed with a red flowered and double blossomed plant. You observe the following phenotype frequencies among the 1545 offspring plants:
500 yellow flowers and single blossom plants
515 red flowers and double blossom plants
260 yellow flowers and double blossom plants 270 red flower and single blossom plants.
What is the recombination frequency between these two genes?
a. (260+270) 1545
b. 270/1545
c. 1545/ (260+270)
d. 260/1545
e. (500+515)/1545
f. 1545/260
g. 1545/270
From these results one can conclude that:_______.
a. the two genes are linked
b. the two genes are not linked
c. if the genes are linked, they are separated far enough apart to appear to assort independently
Answer:
1) option a is correct. (260+270)/1545
(Note about this option: In the statement, it is written as (260+270) 1545. Lacks the division symbol, / )
2) From these results one can conclude that the two genes are linked (option a)
Explanation:
To know if two genes are linked, we must observe the progeny distribution. If heterozygous individuals, whose genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. If we observe a different distribution, phenotypes appearing in different proportions, we can assume linked genes in the double heterozygote parent.
We might verify which are the recombinant gametes produced by the di-hybrid, and we will be able to recognize them by looking at the phenotypes with lower frequencies in the progeny. Phenotypes with the highest frequencies represent the parental gametes.
To calculate the recombination frequency, we will use the following formula: P = Recombinant number / Total of individuals.
In the present example:
Parental) YySs x yyss
Gametes) YS parental type ys, ys, ys, ys
ys parental type
Ys recombinant type
yS recombinante type
The total number of individuals in the offspring: 1545
Phenotypic class Number of offspring
500 Y-S- (parental)515 yyss (parental)260 Y-ss (recombinant)270 yyS- (recombinant)According to this information, the phenotypic frequencies of the progeny differ from the phenotypic ratio 1:1:1:1. We can assume then, that these genes are linked.
The recombination frequency is:
P = Recombinant number / Total of individuals
P = 260 + 270 / 1545
P = 530/1545
P = 0.343
The genetic distance between genes is 0.343 x 100= 34.4 MU.
0.3 kilogram golf ball moving at 45 meters/second equals
Answer:
F = 13.5 N
Explanation:
Which molecule carries the protein code from the nucleus so translation can occur?
Answer:
messenger RNA
Explanation:
The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm. Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm
modern scientific explanations of evolution
a. have replaced darwin’s thinking
b. combine the principles of natural selection and genetic inheritance
c. rely on genetics instead of natural selection
d. fail to explain how traits are inherited
Side-chain hydrogen bonding :__________
a) Side chains that can form hydrogen bonds are located on the outside of a protein, where they can stabilize tertiary structure by forming hydrogen bonds with water.
b) Two cysteine residues can form hydrogen bonds.
c) Side chains connect distant parts of a polypeptide chain and introduce loops into the chain.
d) Threonine and glutamine can form hydrogen bonds.
e) Hydrogen bonds stabilize quaternary protein structure by holding together several protein strands.
Answer:
a) Side chains that can form hydrogen bonds are located on the outside of a protein, where they can stabilize tertiary structure by forming hydrogen bonds with water.
Explanation:
A hydrogen bond occurs between a hydrogen atom and four other elements. The side chain hydrogen bonds are resulted from the tertiary arrangement of structural components of the proteins.
The side chain hydrogen bond are present at the outside of the protein at places where the water forming the hydrogen bond can stabilize the tertiary structure.
What are the Necessary conditions to form a natural lake
Answer:
What conditions are necessary for a natural lake? Lakes form in a variety of ways when a natural depresion fills with water. The lake must have a source of water that is greater than the outflow and evaporation. It must be on earth that does not allow too much water to infiltrate.
Explanation:
Answer:
Lakes form in a variety of ways when a natural depression fills with water. The lake must have a source of water that is greater than the outflow and evaporation. It must be on earth that does not allow too much water to infiltrate.
Which of the following is an example of a learned response? OA A child figures out how to ride a bicycle. O B. An adult salmon is able to return to the river where it hatched. OC. A plant turns to follow the sun during the day. OD. A man blinks when an object is tossed toward his face.
Answer:
Explanation:
I would say A. Learning to ride a bicycle is a process of getting on and falling off. You have no idea how to do it properly without practice. That's learned.
But look out for D. I'm not sure that that isn't instinctive. Somewhere along the line I think even a baby knows not to let his/her eyes be touched. Is it learned? It's close but A is a much better answer.
The salmon is instinctive. The plant doesn't learn to turn towards the sun. It does so because more food is produced.
Yes, it's A.
A is the only option that is not instinctual. Riding a bicycle is something that has to be taught (and even if you weren't taught to ride a bike, you had to figure it out by trial and error.)
The other options are instinctual and reflexive responses. The salmon returning to the river is a behavior that is pretty much hard-wired into the salmon's brain. The plant turns to follow the sun because it is a source of light and energy.
The other user expressed uncertainty as to option D, but in fact, option D is very much a reflexive, instinctual response as well. To flinch or blink when something abruptly moves towards you is not a choice or something you have to be taught — it's a reflex, something you can't control.
Complete the following statement from what you have learned about the motor unit. In some neurodegenerative diseases the lower motor neuron cell bodies die and the remaining lower motor neurons sprout processes that innervate the neuromuscular synapses vacated by the dead lower motor neurons. In these muscles, the size of the motor unit ____________ and the strength of the muscle contraction generated by individually activating each surviving motor neuron _________.
Answer:
The correct answer is - increase, increase.
Explanation:
In some neurodegenerative diseases, some lower motor neuron cells die and the remaining lower motor neurons continuing the process of the vacated dead motor neuron cells to innervate the neuron and muscle synapses.
The size of the motor unit increases and due to the innervations of the new axon
increases the strength of the muscle contraction occurred by individually activating each surviving motor neuron. Here multiple motor units will be controlled by a single neuron.
help l m a o ........
Answer:
D
Explanation:
LKM iF i AM CORRECT
Something you might call someone who is small invertebrates animals
The earliest hominid fossil, “Lucy," is estimated to be 3.2 million years old. This early
human-like species shares an important characteristic with modern humans: bipedalism.
Which of the following would favor the selection of bipedal posture over walking on all
fours?
Bipedal posture allowed for greater mobility in the tree canopy.
ООО
Bipedal posture allowed arms to be free to develop and use tools.
Bipedal posture allowed for an increase in hominid brain and jaw size.
Bipedal posture allowed a greater number of offspring to be produced in
hominids.
Answer: Bipedal posture allowed arms to be free to develop and use tools.
Explanation:
Answer:
Bipedal posture allowed arms to be free to develop and use tools.
Explanation:
Bipedalism favors in the arms to be free
Hope this helps! :)
can someone pls help :)
Answer:
1 . A 3.B 2 .B . this is all I know but try the internet for more
Jesse is learning about how Earth's landmasses are shaped by natural forces. Jesse's science teacher says that water is constantly changing Earth's surface. Describe two ways that water makes lasting changes to Earth's surface
What is cellular respiration
Answer:
cellular respiration is the process by which organisms uses oxygen (O²) and glucose (C⁶H¹²O⁶) to digest food molecules to acquire chemical energy for cells function.