Answer
it is A
Explanation:
just took quiz and got it right
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Answer:
yes is right 75%
Explanation:
Name two homologous structures in vertebrates. Why are they so called ? How do such organs help in understanding an evolutionary relationship ?
Please help me with this, i'll reward brainliest.
Answer:
1) homologous structures in vertebrates - Limbs of birds, mammals, amphibians and reptiles. 2) They are so called since they have similar basic structural plan, but appear different externally and perform different function. However they have evolved from a common ancestor. 3) The homologous characteristics indicate common ancestory.
Explanation:
I just hope this helps!
➜ Two homologous structures in vertebrates are:
Limbs of birds and reptiles.Limbs of reptiles and amphibians.These are so called because the organ have similar structure to perform different functions in various vertebrates.
The homologous characteristics of such organs indicate common ancestory. Thus these exist an evolutionary relationship.
how does the enzyme impact activation energy
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Explanation:
1. What happens to a plant that is put into a dark place? The plant's green color fades because it cannot perform photosynthesis without light. It grows taller.
Answer: The answer is the green part of the plant faces away because it cannot perform photosynthesis without light.
Explanation: The reason for this is because sunlight is always important to receive while performing photosynthesis because without sunlight, the plant would lose one of its major factors for photosynthesis.
Which is not a characteristic of homologous chromosomes?
A. same length
B. same centromere positon
C. exact same type of alleles
D. same genes
Answer:
C. exact same type of alleles
Why don’t mosses grow very tall?
They need energy to make food, which they get by being close to the ground.
They don’t have roots, so they must be near water.
They need to send out spores via water.
They have seeds that need to roll away.
Answer:
Hello~
Llamalover here!
Mosses have some water-conducting cells, but they do not have the empty, lignin-reinforced cells that allow vascular plants to transport water with strong pressure gradients. Thus, mosses have very limited water transport ability and can't grow very tall.
So, your answer is They need to send out spores via water. I believe
Explanation:
Hope this helps!
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5. Which of the following statements is correct?
-Reabsorption of water is hormonally controlled
-Normal filtrate contains large amounts of protein
-Most of the water passing through the kidney is eliminated as urine
-The excretion of sodium ions is one of the mechanism that maintains pH balance in the blood.
Answer:
most of water passing through through the kidney is eliminated as urine
What is the function of the seed (fertilized egg)?
Q#21 on pic
Answer: Seeds serve several functions for the plants that produce them. Key among these functions are nourishment of the embryo, dispersal to a new location, and dormancy during unfavorable conditions.
Explanation: i hope this answers your question nd have a nice day or night
A segment of RNA reads A U G U C C A C A. Use the codon table to determine what the sequence of amino acids for this segment should be?
A.) Met-Ser-Thr
B.) Cys-Thr-Tyr
C.) Cys-Ser-Tyr
D.) Met-Leu-Thr
When a spring is compressed the energy changes from kinetic to potential which best describes what is causing the change
A. Work
B. power
C. Gravitational energy
D. Chemical energy
Evolution reinforcement
Answer:
Reinforcement is the process by which natural selection increases reproductive isolation. Reinforcement can occur as follows: When two populations which have been kept apart, come back into contact, the reproductive isolation between them might be complete or incomplete. If it is complete, speciation has occurred.
Explanation:
<3
Answer:
Reinforcement is the process by which natural selection increases reproductive isolation. Reinforcement can occur as follows: When two populations which have been kept apart, come back into contact, the reproductive isolation between them might be complete or incomplete. If it is complete, speciation has occurred.
#Carry on learning❤️HOPE IT HELPS :D❤️
Adenine with Thymine and Cytosine with Guanine are known as the nitrogen ____ in DNA.
Answer: Nitrogen bases
Explanation: because of the base pair rules
The crossing of a buffalo and a cow to produce a beefalo is an example of -
Answer:
The answer is inbreeding
The process shown in the diagram produces oxygen and sugar. Which
process uses oxygen and sugar as reactants?
0
Chloroplast
Mitochondrion
Sugar
CO, +H,0
ATP
Heat
Respiration
O A. Cellular respiration
B. Water cycle
c. Transpiration
D. Photosynthesis
Answer:
Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP; waste products include carbon dioxide and water.
Explanation:
so ts Cellular Respiration
The process uses oxygen and sugar as reactants is the Cellular respiration as it produces ATP as the end product.
What is cellular respiration?Celullar respiration, the system via way of means of which organisms integrate oxygen with meals molecules, diverting the chemical power in those materials into life-maintaining sports and discarding, as waste merchandise, carbon dioxide and water.
Oxygen and glucose are each reactants withinside the system of mobile respiratory. The foremost made of mobile respiratory is ATP; waste merchandise consist of carbon dioxide and water.
Read more about the Water cycle:
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What is a nucleosome
Answer:
A nucleosome is the basic structural unit of DNA packaging in eukaryotes.
How could you classify an animal that behaviourally regulates its body temperature during the daytime? a) homeothermic ectotherm b) homeothermic endotherm c) poikilothermic endotherm d) poikilothermic ectotherm
Answer:
endotherm. yessiir
Explanation: because im kanye west. a genius
Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell: Select all that apply. accumulate near the centromeres. are deleted from the genome. become more densely packed with nucleosomes. accumulate point mutations. undergo irreversible repression.
Answer:
The correct answer is ''undergo irreversible repression.''
Explanation:
The morphological and physiological transformation of meristematic cells into adult or differentiated tissues constitutes the process of cell differentiation. This, and the consequent specialization of the cell, bring about the division of labor, forming cells with specific functions. Differentiation occurs by differential activation of some genes and repression of others. Depending on the position it occupies, each cell receives certain stimuli to develop the corresponding activities. During the differentiation process, cells undergo a series of changes in their characteristics and there is a readjustment in their mutual relationships.Different molecular factors initiate and drive the programming / reprogramming of cell fate through the modulation of specific genomic and epigenomic patterns, which regulate the expression of activator / repressor genes of the main fundamental and specialized cellular processes. Thus, the differentiated cell will express certain genes and acquire certain functions.Adult stem cells are responsible for maintaining the different types of specialized cells that make up the body. Asymmetric cell division in stem cells has emerged as one of the main physiological mechanisms that regulate the number of cells and their diversity to maintain tissue homeostasis. A large number of molecules, generically called determinants of cell fate, participate in the regulation of asymmetric division. Asymmetric division of somatic stem cells produces both a stem cell and a progenitor. The initial progenitor cells, through new cycles of asymmetric cell division, finally reach their terminal state of cell differentiation, due to changes in intracellular and extracellular (environmental) signaling. After cells leave their mother state and begin to differentiate, they make exclusive selections for phenotypic pathways through secondary genomic / epigenomic modifications, mainly to different types and gradients of transcription factors (physiological programming of cell differentiation). This leads, for example, to activation of specialized biosynthetic pathways, remodeling of the cytoskeleton, and repression of cell proliferation signaling. The expression of genes is regulated mainly at the level of their transcription. Transcription factors correspond to proteins with the ability to interact with specific DNA sequences and trigger their transcriptional activity. Most transcriptional factors contain different domains that participate in different aspects of protein function; they generally contain two domains: a domain that binds to specific DNA sequences and an activation domain that regulates transcription by interacting with other proteins. In the regulation of gene transcription, in addition to transcription factors, coactivating and corepressor molecules participate, which bind to them, modifying their activity in a positive or negative sense. Each cell type has a characteristic pattern of gene transcription, which is determined by the binding of combinations of transcription factors to the regulatory regions of a gene.
Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell are undergoing irreversible repression.
What does the term gene repression mean?
Gene repression is the switching off of unique genes whose products are needed to support the function of the cell such as the production of vital enzymes or cofactors.
This is specifically important if the products of such genes are not long-lived and deteriorate, or are metabolized.
Thus, option "D" is undergo irreversible repression.
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The hormones of the adrenal medulla are modified
(a) fatty acids. (b) amino acids. (c) monosaccharides. (d) nucleotides. (e) steroids.
Answer:
b
Explanation:
hormones of adrenal medulla are Adrenaline and non- Adrenaline. they are the derivatives of amino acids called Tyrosine( aromatic Amino acid)
The hormones of the adrenal medulla are modified versions of amino acids. Thus, the correct option is B.
What is the Adrenal medulla?The adrenal medulla may be defined as an internal part or region of the adrenal gland which is located at the region of the top of each kidney.
The adrenal gland is a small gland that comprises the adrenal cortex and adrenal medulla. The adrenal cortex synthesizes steroids hormones like mineralocorticoids, glucocorticoids, etc. While the adrenal medulla is responsible for the secretion of epinephrine and norepinephrine.
The hormone epinephrine is also known as adrenaline. It is often called catecholamine. This epinephrine is extracted from the derivatives of amino acids known as tyrosine.
Therefore, the hormones of the adrenal medulla are modified versions of amino acids. Thus, the correct option is B.
To learn more about the Adrenal medulla, refer to the link:
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Please help with this. Will give Brainliest.
Answer:
A trust me i think im right i want brainiest
Explanation:
Analyze the Punnett square below and determine the the genotypic ratio. Axial flowers are dominant
Answer:
first answer choice
Explanation:
there's 1 AA, 2 Aa's, and 1 aa. the genotype is the combination of those letters, and the phenotype is what they would look like.
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Which statement BEST describes the relationship between photosynthesis and cellular respiration?
A
Both processes release energy in the form of heat.
B
Both processes use energy to form molecules of glucose.
C
The products of one process are the reactants in the other process.
D
The products of one process are the same products in the other process.
Answer:
b
Explanation:
How can new species arise through isolation?
Answer:
sorta
Explanation:
wit da right ppl it can breed new annimels
Which of the following is the form of
energy an object has when it is in
motion?
A. potential
B. kinetic
C. magnetic
what are the chances that a color blind man will have a color blind grandson what are the genotypes for all involved.
Answer:
Depends
Explanation:
It depends if the genotypes are hetero.zygous or resessive/dominant homo.zygous. Being colorblind could be represented by a resessive genotype like, bb. if their son/daughter has Bb or bb or their son/daughter in law has a resessive trait then having a color blind grandchild maybe possible. The colorblind grandson has parents that both have at least 1 resessive trait, then the grandson could not be colorblind.
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Answer:
C.
Explanation:
A is mental well-being.
B is social well-being.
C is physical well-being.
D is medical well-being.
Answer:
C. getting regular exercise
Explanation:
Getting regular exercises is a part of physical well being as it makes us fit and healthy.
Which topic do biologists ask questions about and study using the scientific
process?
O A. Organisms and health
O B. Computer technology
Ο Ο Ο Ο
O C. Philosophy and art
D. Government elections
Answer:
By using, the scientific method Biology is capable of studying the different components of the organisms, including the Genes, Bacterias, and viruses, making Health one of the main subjects of study for the Biologists.
soo in my thought
A. Organisms & heath
Solids have a definite:
a Shape
b Volume
c Arrangement of atoms, molecules
d All of the above
Answer:
d all of the above :)
Explanation:
hope this helped
Answer:
D) All of the above.
Explanation:
The Shape of a solid does not change (with exceptions), and the atoms typically remain static with little freedom of movement.
The volume of the solid also stays exactly the same if no external adjustments are made.
The arrangements of atoms & molecules are definitive and packed together, giving little movement, therefore allowing the solid to keep form.
~
The first unstable compound formed during C3 cycle is:
(a) 3-carboxy,2-keto, 1,6 bi phosphorobitol
(c) 2-carboxy,3-keto,1,5 biphosphorobitol
(b) 2-carboxy,3-keto,1,5-biphosphorobitol
(d) 3-carboxy,3-keto, 1,6-biphosphorobitol
Answer:
(b) 2-carboxy,3-keto,1,5-biphosphorobitol
Explanation:
2-carboxy, 3-keto, 1,5-biphosphorobitol is the first unstable molecule formed during the C3 cycle. Due to its instability, this molecule is quickly broken down into two molecules each containing 3 carbon atoms, called 3-phosphoglyceric acid, this breakdown is done through water in a process known as hydrolysis.