Answer: the chemical messages will impact the cells resulting in change to gene expression
Explanation:
The specific function of signal cells releasing chemical messages to nearby cells during early embryonic development is the chemical messages will impact the cells, resulting in a change in gene expression. The correct option is A.
What is embryonic development?The growth and formation of the human embryo are known as human embryonic development or human embryogenesis. It is distinguished by early developmental processes in the embryo, such as cell division and cellular differentiation.
The endoderm, mesoderm, and ectoderm are three germ layers that develop throughout this process, known as gastrulation. Different components of the organism will develop from the cells in these three levels.
Therefore, the correct option is A, The chemical messages will impact the cells, resulting in a change in gene expression.
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In pea plants, yellow seeds are dominant over green seeds. What would be the
expected genotypic ratio in a cross between a plant with green seeds & a plant that
is heterozygous for yellow seed color?
A. 1:1
B. 1:3
C. 1:2:1
D. 4:1
The expected genotype ratio is 1:3.
The genotype of an organism is the sum total of the gens that the organism received from its parents. The genotype determines the traits of an organism (phenotype).
Let the dominant gene be R and the recessive gene be r then we have a cross between RR and Rr. The expected genotype ratio is 1:3.
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Can you explain why DNA must be replicated before mitosis and the role of helicase in DNA replication
Answer:
1. dna needs to be replicated before mitosis so that the parent cell has the same amount of genetic material as the parent cell once it has split.
2. helicase is an enzyme that is so dna can unwind.
Explanation:
the explanation is in the answer.
I hope this helps!
Answer:
DNA must be replicated before mitosis so that both identical daughter cells contain the same amount of genetic material as the parent cell once it has split in two. Helicase is an enzyme necessary at the initiation of DNA replication to unwind/unzip the DNA so that this process may begin.
Which is an example of how the peripheral nervous system helps the body maintain
O Muscles produce keratin so that hair can grow stronger.
O Sweat glands break down the food that is consumed.
O Muscles contract rapidly to produce heat on a cold day.
O The brain recalls information to help take a test.
Answer:
C. Muscles contract rapidly to produce heat on a cold day.
Explanation:
CORRECT
Answer:
O Muscles contract rapidly to produce heat on a cold day.
Explanation:
Hope this helps
Is malachite made of just copper?
Answer:
No
Explanation:
Cu2(CO3)(OH)2 - there are other elements present other than just copper
How does thermal energy affect the earth's layers?
Answer:
The thermal energy of the Earth remains from its formation and is continuously generated from radioactive decay of long-lived radionuclides in the Earths interior. The deeper the Earth layers the higher the temperature with the geothermal gradient of temperatures through the Earth’s crust on average as high as 25–30°C/km.
Explanation:
The thermal energy affect the earth's layers by forming a thermal gradient.
Thermal energy of the Earth:
Deep inside the earth the thermal energy is generated by the radioactive decay of long-lived radionuclides.
This creates a thermal gradient from core to surface of the earth. The temperature of the core is highest, then the manle is semi-solid or liquid.
The crust of the earth is solid and have relatively less temperature,
Therefore, the thermal energy affect the earth's layers by forming a thermal gradient.
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Black coat is dominant over white coat in guinea pigs. A homo-zygous black pig is mated with another homo-zygous black pig.
What are the genotypes of the parents?
Question 5 options:
bb and bb
BB and bb
Bb and Bb
BB and BB
Answer:
BB and BB
Explanation:
BB is a homo-zygous allele and both of the parent guinea pigs are homo-zygous.
A black coat is dominant over a white coat in guinea pigs. The genotypes of the parents are BB and BB. The correct option is d.
What is a genotype?The terms genotype and phenotype relate to the individual's alleles and the observable traits that are generated from the genotype and determined by the dominance of the alleles, respectively.
For black coat = B
For White coat = b
A homozygous black pig is mated with another homozygous black pig. Homozygous means only one character will be shown in the genotype, that is the dominant and the dominant trait is black, B so, the genotype will be BB and BB. Recessive traits are hidden that do not show, and that is also black.
Therefore, the correct option is d. BB and BB.
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• Different types of molecules do
things in a cell
Answer:
I dont get what you are trynna ask so..
Explanation:
here are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions. Combined, these molecules make up the majority of a cell's mass.
Answer:
Your cells come from other cells dahhh stup!d
Explanation:
jk it's B
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Describe and list the functions of the cerebrospinal fluid.
Answer:
homeostatic protection, mechanical protection, circulation
Explanation:
Homeostatic protection: cerebrospinal fluid transports polypeptide hormones and its PH allows for cerebral blood flow as well as pulmonary ventilation
Mechanical protection: cerebrospinal fluid absorbs shock, so that energy from an impact does not directly first affect the spine
Circulation: helps allow for the exchange of nutrients between the blood and adjacent nervous tissue
Which of the following is NOT a characteristic of protozoans
a. break down plant matter
b. can cause a disease
c.can live in red blood cells
d. Ingredient in lotion
its a science question
Answer:D
Explanation: Protozoans are a single-celled microscopic animal of a group of phyla of the kingdom Protista, such as an amoeba, flagellate, ciliate, or sporozoan.
Protozoans play important roles in the fertility of soils. By grazing on soil bacteria, they regulate bacterial populations and maintain them in a state of physiological youth— in the active growing phase. This enhances the rates at which bacteria decompose dead organic matter.
Isaac is studying relationships between organisms in the phylum Chordata, which includes humans and all other animals with a backbone. Beginning with domain as 1 and then counting down the levels in the modern system of classification, what level is "phylum”?
2
3
4
5
Answer: Phylum is at level 2.
All living organisms are classified, and the reasons for this are so that they can be examined better, to know and discover their relations, their evolutionary paths etc. while in the past there have been some more simplified classifications, the modern one is complex and well established, based on the characteristics of the organisms(living and died out).
Explanation: Kingdom: Animalia(an animal)
Phylum: Chordata (vertebrate)
Class: Mammalia(mammal)
Order: Carnivora(carnivore)
Suborder: Feliformia (also Feloidea) (cat-like)
Family: Felidae(true cat)
Subfamily: pantherine(big cat branch)
Pls give the first person brainiest I'm just doing this for a challenge
Genus:panthera(big cat)
Species:P.uncia(snow leopard)
Answer:
2
Explanation:
How does hair help prevent diseases?
Hair plays an important role in our lives. The hair on our head keeps us warm and acts as a cushion for our skull. Hair appearance can also help form our identity and self-image, which makes hair loss very troubling.
Most hair disorders aren’t serious, but they are often considered major cosmetic issues that require treatment. Androgenetic alopecia is the most common form of hair loss, although there are a number of other hair conditions that can affect the scalp and other parts of the body.
Question 24 of 35
Which two statements describe the Mesozoic era?
A. Most of Earth's history took place within this time.
B. Plants began to colonize land during this era.
✓ C. It is also known as the Age of Reptiles.
D. It lasted from about 250 million years ago to 70 million years ago.
Answer:
C
Explanation:
it was the time to f the dinosaurs and some of the dinosaurs were reptiles
Describe how the process of apoptosis occurs?
Answer:
Apoptosis is an orderly process in which the cell's contents break down and are packaged into small packets of membrane for “garbage collection” by immune cells. It contrasts with necrosis (death by injury), in which the dying cell's contents spill out and cause inflammation. Apoptosis removes cells during development.
Apoptosis is a form of programmed cell death that occurs in multicellular organisms.
What is apoptosis ?It is a natural biological process of programmed cell death in which the cells destroy themselves and maintain the smooth function of the body parts.
There are two types cell death such as Programmed death of cells or apoptosis and uncontrolled death or Necrosis.
Apoptosis can occur via two pathway such as Extrinsic Pathway is triggered in response to external stimuli, ligand binding at death receptor and these receptors are called as Tumor Necrosis Factor gene.
Intrinsic Pathway triggered in response to internal stimuli such as biochemical stress, DNA damage and this pathway is modulated Bax, and Bcl-2 molecules.
Apoptosis helps in maintaining homeostasis, proper size of the body, cell number, elimination of unwanted cell, T-lymphocytes etc.
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what does hypothesize mean
Answer:
to suggest (an idea or theory): to make or suggest (a hypothesis)
Explanation:
hope this helps have a good of your day :) ❤
Mitosis creates how many daughter cells
can a theory be created by just one person ?
Answer:
Theories can be created by just one person
YesExplanation:
What normally happens is that one person creates a theory, and as years go by new research comes out further advancing or modifying a theory. The theory then is created by many people. Which overall still means that theories can be created by just one person.
can yall please help, have a good day !
Answer:
Claim : Community B is more sustainable.
Evidence: That is because we can observe greenary with more number of small plants
Reasoning : Sustainable means that lasts for a long term right since it has smaller plants and sapplings they take time to grow and lasts for a long time.
Hope it helps
Have a good day too...
All the best!!
Explain How might
chemical weathering
change the appearance
of this obelisk?
Which cellular structure is the site of photosynthesis?
ribosome
chloroplast
nucleus
mitochondria
Answer:
Its b
Explanation:
Caam
Which is true of the material that
makes up wires?
A. Wires made of conductors have high
resistance.
B. Wires made of conductors have greater
resistance.
C. Wires made of conductors have low
resistance.
Wires made of conductors have low resistance. The correct option is C.
What is a conductor?Conductors are materials that allow the flow of through them. Insulators are those materials that prevent electricity from passing through them.
Copper, aluminum, gold, and silver are a few examples of common conductors. Wood, rubber, plastic, and glass are a few typical insulators.
A conductor is an object or kind of material that permits the movement of charge (electric current) in one or more directions.
This term is used in both physics and electrical engineering. Metal-based materials are frequently used as electrical conductors.
Low resistance to the flow of electricity is provided by good conductors like copper, aluminum, etc. They do so because they have a lot of free electrons.
There are no free electrons in insulators. As a result, despite applying voltage across them, essentially no electric current flows through them.
Thus, the correct option is C.
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If there were 7 cytocine (C) bases, how many guanine bases will there be?
Answer:
7
Explanation:
C pairs with G
Gene segments may initiate, terminate, or code for a particular amino acid sequence.
A Gene Segment: A G C T A G
The number of amino acids coded for by the gene segment shown above is:
pls help! on gregor mendel
Answer:
P, F₁, and F₂
Explanation:
The parental generation is also known as P. F₁ is the first generation and F₂ is the second generation.
Two parent plants are crossed. The phenotypes of 1,000 offspring plants are shown below. What are the most likely genotypes of the parent plants?
A. ANL/ANL, YGR/YGR for parent 1, and anl/anl, ygr/ygr for parent 2.
B. ANL/anl, YGR/ygr for parent 1, and ANL/anl, YGR/ygr for parent 2.
C. ANL/anl, YGR/ygr for parent 1, and anl/anl, ygr/ygr for parent 2.
D. anl/anl, YGR/ygr for parent 1, and anl/anl, YGR/ygr for parent 2.
Answer:
C
Explanation:
The data shows that each phenotype occurs about one-fourth of the time. That means that there are about equal numbers of purple-stemmed and green-stemmed plants, and about equal numbers of green-leaf and yellow-leaf plants. Of the four choices, answer A can be eliminated because all of the offspring of an ANL/ANL plant will have purple stems. Answer D can be eliminated because all of the offspring of two anl/anl parents will have green stems.
Examples of obligate intracellular parasites that can only replicate inside a host cell are:
viruses and prions
rickettsia and viruses
viruses and bacteria
rickettsia and prions
Answer:
rickettsia and viruses
Explanation:
This is because obligate intracellular parasite are parasite that affect humans and they grow, reproduce and survive inside the host cell. These parasite cannot live or survive outside host cell but they live inside host cell, replicate and they depend on the host cell resources i.e the use host cell resources thereby causing harm on the host cell. rickettsia and viruses are parasite that can only survive inside a living organism.
Answer:
rickettsia and viruses
Explanation:
How does dew form on grass?
O A. It is formed from melted frost.
O B. It is pushed out of holes in the grass.
C. It is formed on the grass from water in the air.
D. It falls as melted snow and is caught on the grass.
E. it falls like a light rain and is caught on the grass.
Answer:
Dewy Grass. Dew is a natural form of water, formed as water vapor condenses. ... This forces water vapor in the air around cooling objects to condense. When condensation happens, small water droplets form—dew.
so it's C
Explanation:
After food is made in the form of glucose in the leaf, it is then converted to
for transport, then to
for storage.
A) glucose, starch
B) glucose, sucrose
C) sucrose, starch
D) glucose, sugars
Each category represents one of the functions of proteins. Match each example with the appropriate function.
fighting disease
Insulin controls the concentration of sugar in
the blood.
regulating chemical reactions
IgA prevents the buildup of viruses and
bacteria in the gut.
providing structure
Collagen makes skin strong yet flexible.
maintaining homeostasis
Pepsin works in the stomach to speed up the
breakdown of food.
Answer:
1. Providing structure --> Collagen makes skin strong yet flexible.
2. Maintaining homeostasis --> Insulin controls the concentration of sugar in the blood.
3. Fighting Disease --> IgA prevents the buildup of viruses and bacteria in the gut.
4. regulating chemical reactions --> Pepsin works in the stomach to speed up the breakdown of food.
How are rivers made ?
Answer:
Rivers usually begin in upland areas, when rain falls on high ground and begins to flow downhill. They always flow downhill because of gravity. They then flow across the land - meandering - or going around objects such as hills or large rocks.
Explanation:
Hope this helps!
Answer:
A river is created when water moves from higher elevation to lower elevation. It usually goes downhill, and can join with other rivers. The river ends when it flows into an ocean.
I hope this helps!
what substances form the uprights of the DNA ladder