Answer:
Natural selection needs some starting material, and that starting material is heritable variation. For natural selection to act on a feature, there must already be variation (differences among individuals) for that feature. Also, the differences have to be heritable, determined by the organisms' genes.
what is the meaning of ecology.... please don,t miss this chance
Answer:
Ecology is the branch of biology concerning the spatial and temporal patterns of the distribution and abundance of organisms,including the causes and consequences
1.270 calves were born from gray-variegated cattle. Of these, 136 have parental coloring. Determine the genotype and phenotype of the rest of the offspring, if it is known that the gray-variegated coloration occurs when crossing black and white individuals.
2.In some breeds of sheep there are animals without ears and animals with long ears. When they are crossed, animals with short ears are obtained. What offspring will be obtained by crossing short-eared animals and by crossing short-eared rams with long-eared sheep?
Answer:
This is hard
Explanation:
Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base in
a mRNA strand, but during translation the mRNA strand still creates the same protein. Which type of mutation is
responsible for the change in the mRNA base?
A.silent
B.missense
C.nonsense
D.insertion
Answer:
A. Silent, The type of mutation responsible for changing a base in the mRNA strand, without changing the coding aminoacid or protein, is called a silent mutation.
Explanation:
In a silent mutation occurs the change of a nitrogenous base in one of the codons that encodes an aminoacid, without changing the aminoacid or altering the structure or function of the protein to be synthesized.
In this type of mutations the change of the base does not mean the change of the aminoacid, because some aminoacids can be coded with more than one codon. In the case of Leucine, the codons that encode it are CUU, CUC, CUG or CUA, so even if a base changes, the final protein will be the correct one.
For the other options:
Missense: the change of the base in the DNA chain implies the change of the codon in the mRNA and of the encoded aminoacid, in that way a structural and functional alteration of the synthesized protein occurs. Nonsense: the change in the nitrogenous base in the DNA leads to the coding of a termination codon, so that the protein is ultimately incomplete. Insertion: in this case there is the addition of more nitrogenous bases to the DNA chain, with respect to the original one.Answer:
Silent
Explanation:
Edge 2021
PLEASE HELP!!!!!!
The energy available at the trophic level that has producers is 1000 kilocalories. How much of this energy is most likely transferred to the trophic level that has primary consumers? A. 1 kilocalories B. 10 kilocalories C.100 kilocalories D. 1000 kilocalories
Answer:
C. 100 kilocalories
Explanation:
Only a little amount of energy as 10% is transferred to the next trophic level. This is called 10% rule.
Answer:
C
Explanation:
hiiiiiiiii!!!!!!!! ______-_-
Answer:
haiiiiiiiiiii :) :) :)
Answer:
.
Explanation:
Which THREE processes are involved when a multicellular organism reproduces sexually? a. mitosis b. fusion of gametes c. meiosis d. formation of gametes. Pls help yall!!!
Answer:
B C D
Explanation:
the mitosis it reproduces by its own it doesn't need another person or animal to reproduce.
Rachel types 162162162 words in 333 minutes. Rachel types at a constant rate. How many words does Rachel type per minute?
Answer:
54
Explanation:
162 divided by 3 is 54
and right on khan academy
Answer:
ANSWERS 54
Explanation:
MATH
Please help
DNA provides
A
storage for cellular waste.
B
a structure for the shape of each cell.
C
nutrients for the cell.
D
the genetic material of living organisms.
Answer:
D. the genetic material of living organisms
Explanation:
If energy is released, free energy must be what?
Answer:
If energy is released during a chemical reaction, then the change in free energy from the conversion of the reactants to the products, signified as ΔG (delta G) will be a negative number.
Explanation:
Hope it helped!
Answer:
If energy is released during a chemical reaction, then the resulting value from the above equation will be a negative number. In other words, reactions that release energy have a ∆G < 0. A negative ∆G also means that the products of the reaction have less free energy than the reactants because they gave off some free energy during the reaction.
Explanation:
how are elemens and compouds related,
Answer:
An element is a material that consists of a single type of atom. which Each atom type contains the same number of protons. the Chemical bonds link elements together to form more complex molecules called compounds. A compound consists of two or more types of elements held together by covalent or ionic bonds.
Explanation:
what is cytokinesis important for?
Answer:
I'm not really sure sorry
Identify the phase of mitosis for each plant cell diagram shown below.
Answer:
1. Metaphase
2. Prophase
3. Telophase
4, 5, 6, 8. Interphase
7. Anaphase
Explanation:
Mitosis is a cell division involving the formation of two genetically daughter cells. The process of mitosis involves stages including: interphase, prophase, metaphase, anaphase and telophase.
Interphase is the resting stage of the cell. It is th stage where the cell prepares for the division. Numbers 4, 5, 6, and 8 in the image are stages of interphase.
Prophase is the stage where the chromosomes become visible and arrange in pairs. Number 2 in the image depicts a plant cell in prophase stage.
Metaphase is the stage where the chromosomes align at the equator/middle of the cell. This alignment orients the chromosomes for separation. Image 1 depicts this metaphase stage.
Anaphase stage is the stage where the chromosomes separate into opposite poles of the cell. Image 7 depicts the anaphase stage of this plant cell.
In the Telophase stage, the cell plate forms to divide the plant cell into two. This is shown in image 3.
The cellular phases include Interphase (Figs. 4, 5, 6, 8), Prophase (Fig. 2), Metaphase (Fig. 1), Anaphase (Fig. 7) and Telophase (Fig. 3).
The cell cycle can be divided into two major phases: Interphase and mitotic M phase.The Interphase is classified into three subphases: Growth G1 phase, synthesis S phase and Growth G2 phase.The M phase can in turn be divided into Prophase, Metaphase, Anaphase and Telophase.In conclusion, the cellular phases include Interphase (Figs. 4, 5, 6, 8), Prophase (Fig. 2), Metaphase (Fig. 1), Anaphase (Fig. 7) and Telophase (Fig. 3).
Learn more in:
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When a billiard ball moves across a table, it experiences _________.
Explanation:
etsa super el experimento
When a billiard ball moves across a table, it experiences friction as billiards is a popular sport that requires good hand-eye coordination and is played at leisure using a stick and balls.
What is the significance of the billiard game?It is an old game played in leisure time with a stick and balls on a table and It is a test of skill, precision, and focus that requires good hand-eye coordination and the ability to make accurate shots, and it can be played either individually or by teams. It is also a competitive sport where professional billiards organizations and tournaments around the world take place.
Hence, when a billiard ball moves across a table, it experiences friction as billiards is a popular sport that requires good hand-eye coordination and is played at leisure using a stick and balls.
Learn more about billiards here.
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Which of the following describes how both of these cellular division processes maintain genetic continuity?
А.Both processes involve the replication and division of identical genetic material.
B. Both processes creates cells with half the genetic material of the parent cells.
C. Both process involve the recombination and division of new genetic material.
D. Both processes create cells with twice the genetic material of the parent cells.
Answer: Both processes involve the replication and division of identical genetic material
Explanation:
During S phase interphase DNA is replicated and it is replicated as an exact copy
When a single cell divides into two cells through mitosis, genetic continuity occurs. One cell divides into two during the process of mitosis, and each of the two progeny cells has the same amount of DNA as the parent cell.
What is genetic continuity?The fact that when a cell divides, the resulting two daughter cells have the same number and type of genes as the original cell is referred to as genetic continuity. It also describes how when two sexually reproducing organisms mate, their offspring have the same number of genes as the parents. Nuclear division results in daughter cells with identical sets of chromosomes. Mitosis ensures the genetic continuity of the ancestral cells in the body's daughter cells. It consists of one fully equational division followed by a DNA synthetic phase. Because it creates a perfect copy of DNA for new cells, DNA replication helps to maintain species genetic continuity.To learn more about Genetic continuity refer to:
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Nitrogen in the atmosphere exists in the form of _____.
NO2
NO3-
NH4+
N2
NH3
Answer:
N2
Explanation:
Although the atmosphere is mostly made up of nitrogen, it is in the form of a gas known as dinitrogen N2. Plants cannot use this form. Dinitrogen, or atmospheric nitrogen, can also be found in the soil. In addition to dinitrogen, other inorganic and organic forms exist in the soil as well.
HELP PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
Answer:
C
Explanation:
Which term means having only one set of chromosomes?
A. Angiosperm
B. Gymnosperm
C. Diploid
D. Haploid
PLEASE HELP NOW PLESE
Answer:
1. true
2. false
3. false
4. true
can someone please help me figure this out! due in 10 mins!! 20 POINTS!!!!
Raising the temperature of a gas will increase its pressure if the volume of the gas
Answer:
raising the temperature of a gas will increase its pressure if the volume of the gas. and the number of particles are constant. the temperature and volume in a closed container of gas remain constant if the number of particles of gas is increased, the gas pressure will.
What are the possible results of gametes receiving the wrong number or proportion of chromosomes during meiosis II? Select all that apply.
A) zygote that cannot survive
B) gametes with one copy of chromosomes
C) two new nuclei forming during cell division
D) medical conditions for the offspring
Answer: a and d
Explanation:
edg.
Answer:
A and D are the correct answers
Explanation:
Does anyone know if these are correct, I’m just asking because idk if they are correct or not.
Yes, these are correct
1. The chemical equation for photosynthesis is shown below is incomplete
6H20 + ______________ energy C6 H12 O6 + ________________
Plant pigment
a) Complete the equation in either all words or all symbols.
b) Name the plant pigment necessary for this reaction
2.
Name the tissues labelled A………………….., B………………… and C…………………..(3M)
3. Complete the table by matching each of the described functions to one of the leaf parts as shown in above diagram (4M)
Description of function Leaf part
Main region for photosynthesis. Contain
many chloroplast to trap light energy.
Cells are loosely packed. Air spaces between cells allow gaseous exchange.
Thin and transparent layer that allows light to pass through.
Water vapor passes out during transpiration.
If question 2 is not answerable or if the picture is missing then leave it
Answer:
Explanation:
C2+c4=83
Carbon plus oxygen
True or False: If a planet were to stop moving relative to the sun, gravity would draw that planet into the sun.
Answer:
True
Explanation:
Solve the scrambled letter according to the clue: nlpituloo _ _ _ _ _ _ _ _ _: Litter on the ground or harmful chemicals in the water. Who answers correctly will have 30 bonus pts.
Answer:
pollution
Explanation:
The correct word would be pollution.
Pollution can be described as the presence of ecologically harmful substances in the environment.
Littering the ground is considered pollution because it is harmful to the environment in the long term. Harmful chemical in water is outrightly considered pollution because this will hurt the organisms living in the water and rendered the water unusable to those around it.
Answer:
same for m pollution
Explanation:
what is not a characteristic of life?
•obtaining and using energy
•maintaining homesostasis
•having cells
•movement
Movement because plants don't move and animals aren't miving constantly
why herbaceous plants drop their leaves in hot and dry weather while woody plants remain erect
Answer:to let the leaves dry out
Explanation:
potato plants also produce flowers and reproduce sexually how does being able to reproduce asexually benefit the plant
Being able to reproduce asexually benefits the plant because the plant will mature much faster than a plant the produces sexually.
Which substance is harmful in drinking water at any amount?
A) Nitrates
B) Pesticides
C) Charcoal
D) Coliform Bacteria
Answer:
B
Explanation:
Its a poison stay away from it no matter how much it is
Where do the most powerful earthquakes on Earth occur?
Answer:
Most earthquakes happen at or near the boundaries between Earth's tectonic plates
Explanation:
because that's where there is usually a large concentration of faults. Some faults crack through the Earth because of the stress and strain of the moving plates.
If you don't know where the tectonic plates are there is a lot of maps out there :>
theres these platetechtonics at the bottom of some places at earth, but i dont know where.