Answer:
The dark colored moths were due to a genetic mutation, and were more than likely present before the Industrial Revolution. Their fitness was low because predators could easily see them on the light-colored trees. They would be eaten before they could reproduce and pass on their genetic mutation. After the trees became darkened by soot, the darker colored moths now had the survival advantage, able to "hide" from predators. The lighter colored moths became more visible to predators, and the advantage shifted. Now, the light colored moths were more visible to predators, were eaten, and didn't have the chance to reproduce. The darker moths with the mutation had the survival advantage, blending in with the soot-covered trees, and were able to reproduce at higher rates, passing the mutation on to later generations.
The increase in temperature with depth in the Earth is called the geothermal ____
Answer:
Geothermal gradient
Explanation:
Answer:
.energy..
Explanation:
The place where photosynthesis occurs is the:
A. mitochondrial membranes.
B. thylakoid membrane.
C. plasma membrane.
D. ribosone.
it's not chloroplast.
Answer:
B
Explanation:
it's thylakoid membrane
Answer:
Thylakoid membrane.
Explanation:
Hope this helps!
describe the structure of DNA and how it can be extracted from plant cells?
Explanation:
DNA can be extracted by grinding the tissue in dry ice or liquid nitrogen with the mortar and pestel or a food grinder. the cell membrane must be disrupted,so that the DNA is released into extraction buffer.
Plant cells are eukaryotic cells that make up plant tissues and have three types of DNA: nuclear, mitochondrial and chloroplastic, for their study, nucleic acids must be isolated by physical or chemical methods.
What are plant cells?They are eukaryotic cells that make up many of the tissues of organisms belonging to the Plantae kingdom, have a differentiated nucleus, contain hereditary genetic information (DNA) and can be nuclear, mitochondrial and chloroplastic.
The extraction and purification of nucleic acids constitutes the first stage of plant cells studies, the DNA precipitates in alcohol out of solution, where it can be seen and separates it from other cellular components, which are left in the aqueous solution.
Therefore, we can conclude that plant cells are eukaryotic cells that make up plant tissues and have three types of DNA: nuclear, mitochondrial and chloroplastic, for their study, nucleic acids must be isolated by physical or chemical methods.
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What connections are there between the changing surface of the Earth and the evolution of life?
Please help!!
Evolution is the modification of heritable traits. The change in the earth's surface is directly linked to evolution as the formation of the species, abiotic factors, and gases happened due to changes.
What is evolution?
Evolution is the adaptation and survival of the modified organism due to changes in favorable environmental conditions. It is an important factor governed by natural selection.
The evolution and the change in the earth's surface are interconnected as the changes in the earth's crust made the presence of the living beings possible. The conditions at early times were unfavorable that underwent many changes till the present scenario.
The atmosphere and crust were unfavorable for the living beings that got changed and improved with oxygen quality, water, and the crust for the organism to exist, survive and reproduce to continue their lineage.
Therefore, evolution is linked to changing the earth's surface.
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describe how the structure of the cuticle, palisade mesophyll, spongy mesophyll and guard cells are adapted for their functions
Answer:
Cuticle - It also has a waxy material that protects the leaf from attacks by bacteria, protects inner tissues from mechanical damage and acts as a water proof layer to prevent excessive water loss.
Palisade mesophyll - They have many chloroplasts used to absorb light energy used for photosynthesis.
Spongy mesophyll - The cells are loosely packed together leaving air spaces that allow for air circulation and gaseous exchange.
Guard cell - They have thick inner walls and thin outer walls to control the opening and closing of the stomata.
What is "Radioactive Dating"?
A. A method of determining the age of a fossil that estimates the age of the organism at its death
B. A method of determining the age of a fossil based on the amount of certain isotopes that remain in a fossil or rock
C. A method of determining the age of a fossil that estimates how closely related various fossilized organisms were
D. A method of determining the age of fossil based on a comparison to the age of other similar fossils
Answer:
Unlike relative dating methods, absolute dating methods provide chronological estimates of the age of certain geological materials associated with fossils, and even direct age measurements of the fossil material itself.
Mrs. Tuff is now insistent that Tommy sits in her lap and as she speaks to Tommy he begins to cry more and refuses to open his mouth. Mrs. Tuff continues to tell Tommy that it won't hurt and if he only opens his mouth, he will get a toy. What steps can you take now to get Tommy to cooperate?
Solution :
Tommy is a young boy and is feeling afraid to open his mouth and show it to Mrs. Tuff. Something had stuck into his mouth and he is finding it difficult to eat anything and it is paining a lot.
Mrs. Tuff is insisting tommy to sit on her lap so that she could examine him but he refuses to open his mouth and cries loudly. I told Tommy that it is for his own good and he should listen to Mrs. Tuff and open his mouth so that Mrs. Tuff could treat him. By this Tommy will get relief from his pain and he will better.
I also insisted Tommy to open his mouth as it will cause him any pain. I gave something to Tommy so he can get distracted and open his mouth. Mrs. Tuff also told him that he will get a toy if he opens his mouth.
This is how I got Tommy to cooperate with Mrs. tuff.
Sea urchins belong to the echinoderm phylum. Adult sea urchins have spines that extend outward from their exoskeleton, but as larvae, the sea urchins have only an exoskeleton made from spicules. The spines offer protection against predators. The population size of sea urchins is low in relation to the carrying capacity of the area. As a result, the sea urchins are Multiple choice question. A) r-strategists that allocate much energy toward parental care. By-strategists that allocate energy to producing many young. C) density-independent, because there is plenty of energy. D) irruptive, because their numbers crash quickly.
Complete question:
Sea urchins belong to the echinoderm phyla. Adult sea urchins have spines that extend outward from their exoskeleton, but as larvae, the sea urchins have only an exoskeleton made from spicules. The spines offer protection against predators. Sea urchins typically spawn near the surface. Males release sperm into floating plankton, then female urchins release between eight and 20 million eggs in the same area. The jelly-like coating on the eggs attracts the sperm, and when the two meet, they create an embryo that starts dividing into new cells within minutes.
Based on the information the population size of sea urchins is low in relation to the carrying capacity of the area. As a result, the sea urchins are
A) r-strategists that allocate much energy toward parental care.
B) r-strategists that allocate energy to producing many young.
C) density-independent because there is plenty of energy.
D) irruptive, because their numbers crash quickly.
Answer:
B) r-strategists that allocate energy to producing many young.
Explanation:
According to the given information, this species expresses survival curve type III, characteristic of r-strategists. Males and females release many gametes into the sea. If these gametes get to meet, they produce the embryo that starts developing. But there are high chances for these new organisms to die. Significant mortality during the early stages of life is expected for the species. The few individuals that manage to reach the later life stages, getting to survive, usually have a long life. These species produce many gametes to release, which results in the production of many offspring simultaneously. However, adult individuals provide no parental care. Their success in reproduction depends on the number of surviving descendants.
Males release sperm into floating plankton, Female urchins release between eight and 20 million eggs in the same area,When they meet, sperm and egg create an embryo that starts dividing into new cells within minutes.We might also mention that the population size is under the carrying capacity. r-strategist choose to live in areas with only a few individuals, where nitches are hardly occupied.
You look at a cell using a microscope. You see ribosomes and a nucleoid that has one circular chromosome and no surrounding membrane. You do not see any endoplasmic reticulum, mitochondria, Golgi or chloroplasts. From these observations you would conclude you were looking at Group of answer choices
Describe two specialized cells in the respiratory system that enable the lungs to function?
Answer:
Respiratory epithelial cells line the respiratory tract from trachea to bronchi into bronchioles and alveolar sacs. ... The goblet cells produce and secrete mucous to trap pathogens and debris within the airway tract. Basal cells are progenitor cells that differentiate into cells types found within the epithelium.
what is pre. existing cell.
Answer:
hey, here is your answer mate..!
Explanation:
All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.
hope it helps mark as brainlist please
Answer:
The third part of the cell theory definition states that all cells come from preexisting cells. This means that cells don't just appear out of thin air (known as “spontaneous generation”). New cells are always made from current cells.
A(n) is substance in which one or more atoms have the same number
of protons (i.e. the same atomic number).
Answer here
element
SUBMIT
can someone please help with this urgently.
you don't have to explain, just answer
Answer:
B. option A 2 daughter cells
C. option D metaphase
Answer:
Q1 B
Q2 D
Q3 D
Q4 D
Explanation:
An actin-binding protein called cofilin binds preferentially to ADP-containing actin filaments rather than ATP-containing actin filaments. Based on this preference, which is true? Question 7 options: Cofilin binds to the plus ends of treadmilling actin filaments. Cofilin competes with profilin for binding to actin. Cofilin binds to older actin filaments. Cofilin binds to the plus ends of actin filaments.
Answer:
Cofilin binds to older actin filaments
Explanation:
Microfilaments (also called actin filaments) are a class of protein filament common to all eukaryotic cells, which consist of two strands of subunits of the protein actin. Microfilaments form part of the cell's cytoskeleton and interact with the protein myosin in order to allow the movement of the cell. Within the cell, actin may show two different forms: monomeric G-actin and polymeric F-actin filaments. Microfilaments provide shape to the cell because these filaments can depolymerize (disassemble) and polymerize (assembly) quickly, thereby allowing the cell to change its shape. During the polymerization process, the ATP that is bound to G-actin is hydrolyzed to ADP, which is bound to F-actin. ATP-actin subunits are present at the barbed ends of the filaments, and cleavage of the ATP molecules produces highly stable filaments bound to ADP. In consequence, it is expected that cofilin binds preferentially to highly stable (older) filaments ADP-actin filaments instead of ATP-actin filaments.
QUICK HELP FAST 20 POINTS PLUS BRAINLIEST!!!!!!!!
Smelting is the major method used to refine and enrich which substance?
oil
iron ore
uranium ore
coal
Answer:
The answer is iron ore
Explanation:
Hope this helps :)
Answer:
Iron Ore
Explanation:
Smelting is the extraction of metal from its ore by a process involving heating and melting
How to predict genetic outcomes
que es la iniciación de un cultivo
Answer:
cuando un cultivo inicia y se empieza a arar la tierra
Explanation:
What is the difference between a food chain and food web
Answer:
A food chain is a sequence of organisms through which nutrients and energy pass as one organism eats another. A food chain must start with energy from the sun, have a producer (an organism that makes food by itself with energy from sun), and have at least one consumer eat and gain nutrients from another consumer or a producer. At the end of the food chain, there must be a decomposer to break down the dead animals into nutrients, which is beneficial for soil. Additionally, there must be arrows to indicate the flow of energy travelling from one organism to another. An example of a food chain would be:
sun -> roses -> caterpillar -> crows -> garter snakes -> mushrooms
Energy source: Sun
Producer: Roses
Consumer: Caterpillar
Secondary consumer: Crows
Tertiary consumer: Garter snakes
Decomposer: Mushrooms
A food web is basically an interconnection of multiple food-chains in a graphical representation to see which animal eats what and their niche (role they play in an ecological community). Here's an example of a food web (not mine, credits to creator):
What does the term segmentation mean?
animal in which the mouth forms second in development
trait in which an animal has repeating body parts able to be specialized for different function
animal in which the mouth forms first in development
trait in which the nervous system is concentrated in one end, forming a head
Answer:
trait in which an animal has repeating body parts able to be specialized for different function
Explanation:
Segmentation is a characteristics of many living organisms. Segmentation is referred to as the division of certain body part of an organism into sections. This section is repeated as many times as possible on the animal/plant.
The segment divides the part into specialized units that performs differing functions. The different functions define the organism, hence, segmentation is very important in development.
Answer: trait in which an animal has repeating body parts able to be specialized for different function
Explanation: Segmentation is a characteristic of many living organisms. Segmentation is referred to as the division of certain body part of an organism into sections. This section is repeated as many times as possible on the animal/plant. The segment divides the part into specialized units that perform different functions. The different functions define the organism, hence, segmentation is very important in development.
Note: Hope this helps you and sorry for the late answer.
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Which of the following organisms are most important in biodegradation
bacteria
vultures
omnivores
earthworms
Answer:
Bacteria
Explanation:
Several microorganisms, including fungi, bacteria and yeasts are involved in biodegradation process.
define cerebral action
1. Place a check mark next to each cellular structure necessary to build a bacterial cell.
plasma membrane
cell wall
DNA
nucleus
mitochondria
chloroplast
Golgi apparatus
smooth endoplasmic reticulum
rough endoplasmic reticulum
nucleoid
Answer:
Plasma Membrane
Nucleus
Mitochondrion
Golgi Apparatus
Smooth Endoplasmic Reticulum
Rough endoplasmic reticulum
I hope this help
Explanation:
Pls can someone tell me how many times the human heart beats daily.
Answer:
human heart beats about 100,000 times in one day
Answer:
100,000 times daily
Explanation:
A heart beats about 100,000 times a day and pumps about 7,200 liters (1,900 gallons) of blood.
Cheers,
which of the following would not regulate genes in a eukaryote
Explanation:
ubpuhñ
ugpiypifky8yfyltfiifynfojcljvgjñoyguuprupfyococpg9ugygvojjjjjjkdkpsksmkjejuu ksjwuewrite a short note on akaryotic cells
Answer:
Eukaryotic cells have a nucleus enclosed within the nuclear membrane and form large and complex organisms. Protozoa, fungi, plants, and animals all have eukaryotic cells. ... They can maintain different environments in a single cell that allows them to carry out various metabolic reactions
Answer:
Explanation: Akaryocytes, also known as akaryotes or acaryotes, are cells without a nucleus. The most common type of akaryocytes are viruses. The name is derived from the Greek prefix "a-", meaning "without" and the Greek "karyo-", meaning "nut" or "kernel". ... This cell biology article is a stub.
A psychologist exploring the impact of a new drug on activity in the brain is working on the level of ?
Answer:
A. Lower level
Explanation:
11
Select the correct answer.
Which part of an atom has most of its mass?
A.
electrons
B.
neutrons
Oc.
nucleus
OD.
protons
Reset
Answer:
C NUCLEUS
Most of an atom's mass is in the nucleus—a small, dense area at the center of every atom, composed of nucleons. Nucleons include protons and neutrons. All the positive charge of an atom is contained in the nucleus, and originates from the protons.
How do we make a new gene
Answer:
Well to make a new gene, theoretically you would need to mutate your DNA of some sort.
Explanation:
Genes come naturally from your parents. And if you want a new gene that you can say "control" like being tall or having a high/low metabolism, you would have to rearrange or "mess around" with your DNA.
what is photosynthesis???
..
..
Hope this helps! Please mark me as brainliest!
Have a wonderful day :)
Experiment 1:
A student tested to see if ultraviolet light made plants grow
more slowly. She followed a logical method and used
control and experimental groups. She repeated her
experiment several times, and each time found that plants
grow slightly slower with ultraviolet light.
Experiment 2:
A student tested to see if a new fertilizer made roses
bloom earlier. She used a logical method and control and
experimental groups. She performed one experiment and
found that the fertilizer had no effect.
Which experiment most likely has greater reliability, and why?
thank
Answer:
Experiment 1
Explanation:
This is because she repeated her experiment several times and not just one time.
