Answer:
This is true.
Explanation:
More commonly, an X chromosome will die and get replaced by a Y chromosome (all humans start off as females). When this occurs, the substitute Y chromosome causes changes in the zygote to occur; they begin developing male genitalia (i.e. penises, testicles, prostates, etc.).
pick two structures from an animal cell and explain how they work together and how their functions are vital in keeping the cell alive. the options are cytoplasm, smooth er, nucleolus, nucleus, mitochondria, lysosome, and cell membrane.
Answer:
the cell membrane is the semi-permeable protective cover that keeps the cell held together. the cytoplasm is semi-fluid within the cell membrane that keeps the cell in shape.
Explanation:
what organelles are used in passive and active transport
Molecules can diffuse across membranes via transport proteins, or they can be aided in active transport by other proteins. Organelles such as the endoplasmic reticulum, Golgi apparatus, mitochondria and peroxisomes all play a role in membrane transport.
Mutations can occur naturally during normal cellular processes or be induced by an environmental factor.
True Or false
Answer:True
Explanation:
Which is the best description of the cause of sound waves?
a.a decrease in pressure
b.one object bumping into another
c.molecules becoming electrically charged
d. a vibration in material causing a vibration in an adjacent area
Answer:
the answer is d
Explanation:
When we hear something, we are sensing the vibrations in the air. The number of vibrations per second is known as the frequency, measured in Hertz (1 Hz = 1 vibration per second).
In the two step cellular process of transcription and translation
(A) chromosomes line up and then are pulled to opposite ends of the cell.
(B) stem cells develop in embryonic cells, which then form adult tissue cells.
(C) the DNA double helix is separated and then replicated to form two strands of DNA.
(D) a DNA sequence is copied to form an RNA sequence, and then copied to form a protein.
Answer:
The answer is D
A is cell division, B is some stage of pregnancy, and C is DNA replication.
Why forest and wild life are closely related
Answer:
Wildlife and Forests are heavily dependent on each other since Wildlife forms forests and helps them sustain and grow. In return, Forests provide wild organisms with food, shelter and other resources. Wildlife that live in the forest require it for survival. The forest protects them, in many cases feeds them.
Explanation:
Wildlife and Forests are heavily dependent on each other since Wildlife forms forests and helps them sustain and grow. In return, Forests provide wild organisms with food, shelter and other resources. Wildlife that live in the forest require it for survival. The forest protects them, in many cases feeds them.
Describe how energy flows through an energy pyramid? Write your answer in the space provided below.
Answer:
Depending on the food pyramid, on the side there may be something that says decomposers. These eat from all of the sections of the pyramid.
Energy flows from the bottom to the top, and then to the side with the decomposer.
Unlike fat, protein contains:
1)Carbon
2)Oxygen
3) Nitrogen
4) Hydrogen
HELPP PLEASE!!!!
Answer:
Nitrogen
Explanation:
Hope this helps :)
Answer:
C. Nitrogen
Explanation:
Fat contains Carbon, Oxygen, and Hydrogen, like protein. However, protein also contains Nitrogen which fat does not.
Hope this helped. :)
Im a few sentences, describe major advantages to an organism that reproduces sexually.
Please help with Meiosis! Will give brainliest!!
List the phases for Meiosis I. ________________, __________________, _________________, ______________
List the phases for Meiosis II. ________________, __________________, _________________, ______________
During prophase I the chromosomes __________________ and become ______________________.
Chromosomes that are the same size and have the same genes are called __________________ _____________
Each half of a replicated chromosome is called a ____________________________________________________
Sister chromatids of a chromosome are identical _______________________________.
Answer:
List the phases for Meiosis I: Prophase I, Metaphase I, Anaphase I, Telephase I
List the phases for Meiosis II: Prophase II, Metaphase II, Anaphase II, Telephase II
During prophase I the chromosomes coil and become shorter.
Chromosomes that are the same size and have the same genes are called homologous chromosomes.
Each half of a replicated chromosome is called a chromatid.
Sister chromatids of a chromosome are identical copies of the same chromosome.
Explanation: I hope I helped and have a great day! ^-^
Can someone Please Help Me?!? I'm dying to figure out the answer!! I'll give brainliest
Pea plant has Round Seed dominant over Wrinkled Seed.
Round Seed allele is R
Wrinkled Seed allele is p
_____________________________________CONDITIONS:Hom.ozygous Dominant Alleles: RR (Round Seed)
Heter.ozygous Dominant Alleles: Rr (Round Seed)
Hom.ozygous Recessive Alleles: rr (Wrinkled Seed)
_____________________________________CROSS I:Whenever we cross Heter.ozygous Dominant(Rr) with Hom.ozygous recessive (rr), we get 50% ROUND SEEDS PHENOTIPICALLY(physical appearance), Because as you can see in the picture,
The P1 is Rr
The P2 is rr
When we cross them,
It has 4 offsprings,
Rr Round Seed
Rr Round Seed
rr Wrinkled Seed
rr Wrinkled Seed
Thus the answer is 50% round seed as there are 2 out of 4 heter.ozygous dominant round seed.
_____________________________________ CROSS II:Whenever we cross Hete.rozygous Dominant(Rr) with another Heter.ozygous Dominant (Rr), we get 75% ROUND SEEDS PHENOTIPICALLY(physical appearance), Because as you can see in the picture,
The P1 is Rr
The P2 is Rr
When we cross them,
It has 4 offsprings,
RR Round Seed
Rr Round Seed
Rr Wrinkled Seed
rr Wrinkled Seed
Thus the answer is 75% round seed as there are 3 out of 4 hom.ozygous and hete.rozygous dominant round seed.
_____________________________________CROSS 3:Whenever we cross Homo.zygous Dominant(RR) with Heter.ozygous Dominant (Rr), we get 100% ROUND SEEDS PHENOTIPICALLY(physical appearance), Because as you can see in the picture,
The P1 is RrR
The P2 is Rr
When we cross them,
It has 4 offsprings,
RR Round Seed
RR Round Seed
Rr Wrinkled Seed
Rr Wrinkled Seed
Thus the answer is 100% round seed as there are 4 out of 4 hetero.zygous and homo.zygous dom.inant round seed.
_____________________________________Best Regards, 'Borz'Describe the process of respiration which takes place in human beings whe
oxygen is not available and give an effect.
(T
Answer:
The process in which respiration takes place without oxygen is called as anaerobic respiration.
Aerobic respiration In anaerobic respiration the energy produced is very low as compared to aerobic respiration The organisms which use this type of respiration process are fungi, yeast In this process, (in yeast) glucose broke down into pyruvate and gives ethanol , carbon dioxide and energy In human muscle cells when there is a lack of oxygen this process occurs in which lactic acid and energy are produced.More to know -Pyruvate is three carbon -molecule.
The build up of lactic acid causes cramps in muscles.
Scientists discover two planets orbiting a distant star. The average distance from the star to Planet A is 4 AU, and it takes 432 Earth days for Planet A to orbit the star. If it takes 1,460 days for Planet B to complete an orbit, what is the average distance from Planet B to the star?
Answer:
3.3
Explanation:
no reason for the explanation
Answer:
C. 9 AU
Explanation:
The period (T) of Planet A is 432365=1.2 Earth years. The period of Planet B is 1,458365=4.0 Earth years. Kepler's Third Law states that
a3=kT2
Substituting the known values of a and T for Planet A, we have
43=k⋅1.22
64=k⋅1.4
k=45.7
Using this value for k, we can solve for the distance from Planet B to the star
a3=45.7⋅4.02
a3=731.2
a=9.0AU
An alternative solution is to notice that a3T2=k for both orbits, which means that the ratio a3T2 is the same for both orbits. So, 434322=x314582. Solving this proportion gives x3=729, so x=9.0AU.
which cell stucture is responsible for the passage of material into and out the cell
How does geotheHow does geothermal energy differ from solar energy?
Geothermal energy is cooler and denser than solar energy.
Geothermal energy comes from the internal heat of Earth.
Geothermal energy is transmitted through the atmosphere.
Geothermal energy results from radiation of electromagnetic waves.rmal energy differ from solar energy?
Answer: B || Geothermal energy comes from the internal heat of Earth.
Explanation:
hope it helped xx :))
25. Which of these does natural selection work on?
a. Only animals
b. All populations
c. Only microscopic organism
d. Individuals
e. Only small
Messenger RNA carries a(n) ___________ of the DNA’s instructions out of the nucleus to the ___________.
Answer:
transcript and ribosome
Explanation:
I know this for sure
PLEASE HELP!!
The process, below, does what to benefit a cell? *
Prevents osmosis from causing a cell to shrivel or rupture.
Allows white blood cells to tag pathogens with antibodies.
Decreases the necessary activation energy to speed up the chemical reaction.
Increases the necessary activation energy to slow down the chemical reaction.
Answer:
Decreases the necessary activation energy to speed up the chemical reaction.
Explanation:
This picture shows substrates binding to the activation site of an enzyme causing the enzyme to change shape and therfore speeds up the chemical reaction.
**EMERGENCY IN TEST RN** How did the offspring end up with traits that are different from the traits of their parents?
Answer:
the geans of the parents
Explanation:
Answer:
the inherited recessive genes. recessive genes could lay dormnant for generations before showing themselves
Explanation:
PLEASE HELP!! in the process of translation, the ribosome is the site where---
a. free floating amino acids are picked up by tRNA
b. information from DNA is copied to RNA
c. DNA strands are separated and copied
d. amino acid chains are assembled from information in the mRNA
Answer:
d. amino acid chains are assembled from information in the mRNA
Explanation:
The ribosome is the site where amino acid chains are assembled from information in the mRNA (Option d).
During gene transcription, a sequence of DNA called gene is used as a template to create a messenger RNA (mRNA).Subsequently, this mRNA travels to the ribosome to be used as a template for the creation of a protein by the process of translation.The ribosome is the site where successive amino acids are added to the growing polypeptide according to the order of triplets of nucleotides or 'codons' in the mRNA sequence.In conclusion, the ribosome is the site where amino acid chains are assembled from information in the mRNA (Option d).
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The inheritance of genetic traits from parents to children follows predictable rules. Knowing that each parent contributes genes equally to each child, what determines an inherited trait such as eye color? *
A. Only the interaction between dominant genes.
B. Only the interaction between recessive genes.
C. The interaction between dominant and recessive genes.
D. The interaction between dominant and recessive genes does not determine inherited traits.
Answer:
c is right answer.
The interaction between dominant and recessive genes
Explanation:
Eye colour and blood groups are both examples of dominant/recessive gene relationships.
Eye colour
The allele for brown eyes (B) is dominant over the allele for blue eyes (b). So, if you have one allele for brown eyes and one allele for blue eyes (Bb), your eyes will be brown. (This is also the case if you have two alleles for brown eyes, BB.) However, if both alleles are for the recessive trait (in this case, blue eyes, bb) you will inherit blue eyes.
Plzzz help me out!!!
Help plz! To identify a species, you must first do what?
Answer:
look at the animal and or fossil and relate it to others
Explanation:
Answer:
To identify the species you must first need to find following things -
I) whether the organisms is unicellular or multicellular
ii) Mode of nutrition
iii) Place where it lives
if) Body structure.
All living things are made of one or more cells. What plant cell structure gives the cell its angular shape
Answer:
the cell wall is what gives the plants its angular shape. :)
Explanation:
Based on this evidence, a malfunction in what organelle is most likely responsible for Leigh’s disease
Answer: Mitochondria
Explanation:
The national government wants to increase the number of national parks and recreation areas. How will this act help with the sustainability of our environment?
A.It will increase the carrying capacities of all animal species.
B.It will decrease land use for waste management.
C.It will preserve biodiversity for future generations.
D.It will cause a biological surplus of all plant species.
Answer:
It will preserve biodiversity for future generations.
Explanation:
took test and got it right
A scientist is using a species of green algae to study electron transport chain in photosynthesis. He uses a laser to inactivate all of chlorophyll A in the algae, but leaves chlorophyll B intact (case 1). In a separate experiment, the scientist applies a chemical to the algae that inhibits PS I but does not affect PS II (case 2).
Answer:
The scientist done wrong by inactivating chlorophyll A and PS I.
Explanation:
The scientist done wrong by inactivate chlorophyll A and PS I. If he wants to study electron transport chain in photosynthesis, he needs chlorophyll A and PS I for that because the central role of chlorophyll A is to donate electron in the electron transport chain while on the other hand, the primary function of the photosystem I is the NADPH synthesis, where it receives the electrons for PS II.
Which is common to both photosynthesis and respiration?
es
)
A
NADH is produced by Krebs cycle
B)
Chemical energy is produced in the. form of ATP
Two ATP are formed by the process of glycolysis
D)
Glyceraldehyde-3 phosphate is produced by Calvin cycle,
Matter and Ener
Hot
Answer:
the correct answer is B.
Red blood cells are classifed as type A or type B, based on their surface antigens. Type O
blood does not contain any antigens. The chart below shows the possible phenotypes of
each blood type.
Blood Types
Blood Type Phenotype Alleles
B:
AB
B
AB
Which mechanism explains how both A and B antigens produce type AB blood?
Answer:
codominance
Explanation:
The mechanism that explains how both A and B antigens produce type AB blood is codominance. In codominance, both alleles are expressed equally in the phenotype, which means that both the A and B antigens are present on the surface of the red blood cells in type AB blood.
what is antigen?The mechanism that explains how both A and B antigens produce type AB blood is codominance. In codominance, both alleles in a heterozygous individual are fully expressed in the phenotype. Therefore, in the case of blood type AB, the A and B alleles are codominant, and both antigens are expressed on the surface of the red blood cells.
Hence, The mechanism that explains how both A and B antigens produce type AB blood is codominance. In codominance, both alleles are expressed equally in the phenotype, which means that both the A and B antigens are present on the surface of the red blood cells in type AB blood.
Learn more about the antigen here
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Alleles occur on a fixed spot on a ______________
nucleus
DNA
fragment
Chromosome
Answer:
Chromosome
Explanation:
an allele is a form of gene, which then makes sense to be with a chromosome.
Answer:
chromosome
Explanation: