Answer:
Populations from the Americas started from a founding population with a high frequency of the O allele
Explanation:
Human blood type is determined by three different codominant alleles: IA, IB, and, which are named A (IA), B (IB), and O (i). Each person has two blood type alleles, i.e., one allele inherited from the mother and one from the father. The frequency of the O blood allele is very high in indigenous populations, and in Central and South American populations this allele may reach a frequency of 1 (100%). In consequence, the predominance of the O blood allele in Native American populations suggests that these populations descended from a founding population that had a high frequency of the O blood allele. A founder effect may even cause the fixation of one allele within a population, and this phenomenon is known to be associated with the loss of genetic variation.
Alleles are the variant of a gene, which codes for the different traits of an organism. It could be due to mutations or evolutionary adaptations. The presence of the O allele in Americans has a high frequency.
The evolutionary patterns of the Americans suggest that:
The human blood type is coded by A, B, and O alleles. The individual has two alleles, which are inherited from the father and mother. The frequency of the O allele in the allele in the Americans is higher, which can reach up to the frequency of 100%.
The evolutionary pattern suggests that these populations might have descendent from the population having O-blood type. The phenomenon is often explained as the result of the founder effect, which results in the loss of genetic variation.
Thus, the Americans might have descendent from the population having higher frequency for the O alleles.
To know more about evolution, refer to the following link:
https://brainly.com/question/14437547
CAN SOMEONE HELP ME WITH THE PICTURE ABOVE
Answer:
The answer is C, Species A is a predator and species B is its prey.
Explanation:
I found a random PDF earlier that has all the answers to like a hundred ecology questions and this was one of them.
18 POINTS !
Urban sprawl occurs when
a. cities spread out into the existing countryside
b. cities extend upward
c. people leave cities to live in rural areas
d. none of the above
Answer:
A) cities spread out into the existing countryside
Urban sprawl occurs when cities spread out into the existing countryside.
What is urban sprawl?Urban sprawl is the expansion or spread of urban cities into other parts of a geographical locations that are undeveloped near the cities.
It is characterised by unrestricted growth of urbans like housing,transport and so on.
Therefore Urban sprawl occurs when cities spread out into the existing countryside.
Learn more about urban sprawl below.
https://brainly.com/question/13336101
#SPJ2
An acentric fragment is one result of crossing-over between a normal chromosome and a chromosome that has undergone what kind of mutation?
Answer:
paracentric inversion
Explanation:
A paracentric inversion happens as a result of a portion of one chromosome , or a packet of genetic information, which is flipped such that there are changes in the order of genetic information. Every of the chromosome has a part that is near the middle which is referred to as a centromere. Paracentric inversions do not include the involvement of the centromere of a chromosome.
What is structural and behavioral adaption?
Answer:
Structural adaptations are physical features of an organism like the bill on a bird or the fur on a bear. Behavioral adaptations are the things organisms do to survive. For example, bird calls and migration are behavioral adaptations.
List at least four factors that
determine the type of vegetation
that occurs in a terrestrial
biome.
Pleaseeee help
Answer:
Differences in temperature or precipitation determine the types of plants that grow in a given area (Figure 1). Generally speaking, height, density, and species diversity decreases from warm, wet climates to cool, dry climates. Raunkiaer (1934) classified plant life forms based on traits that varied with climate.
Explanation:
what causes this natural pH level?
Answer:
a balance in CO2
Explanation:
Answer: Balance in Co2
Explanation: took the test
photosynthesis is an example of...
an exothermic reaction
an endothermic reaction
a reaction that gives off heat
a reaction that emits energy
Answer:
Endothermic reaction
Explanation:
Photosynthesis is an endothermic reaction because sunlight is being absorbed during the reaction and the definition suggests that in a reaction if heat is being absorbed it is termed as an endothermic reaction.
10. In multicellular organisms some cells need to be large because of the
functions they perform (i.e .nerve cells, muscle cells). What shape would
be most desirable for these larger cell ? Explaining why in a single word will
not give you credit. *
Answer:
En mi opinión la forma es la ovalada. Es la forma donde se mantiene mas fácilmente la integridad y reproducción de la célula.
Explanation:
Which soil would most likely be found in the Arctic?
Answer:
tundra
Explanation:
because I've done this question
Answer:
tundra soil is also classified as B Gelisols
Explanation:
WILL MARK BRAINLIEST
A farmer planted broccoli during winter. Which crops should he plant now especially after three months of frost?
Answer:
Cauliflower
Explanation:
Because Cauliflower is the closest relative to Broccoli, it is the best option. The soil and the nutrients in the soil will have become suited for broccoli, so you want to put something similar in the soil so that the new plant thrives.
Many tropical ferns can live on other plants without withdrawing nutrients from them. These ferns are said to be:________. a. Epiphytes b. Bryophytes c. Gametophytes d. Saprophytes
Many tropical ferns can live on other plants without withdrawing nutrients from them, and these ferns are said to be epiphytes that are present in Option a as the tropical ferns have many ornamental values, ecological values, etc.
What is the significance of the ferns?Ferns have many symbolic meanings, such as: tropical ferns are popular for their ornamental value, they play a role in regulating the climate by absorbing carbon dioxide and releasing oxygen, thus regulating the climate, they have been used for medicinal purposes, such as curing inflammation, etc.
Hence, many tropical ferns can live on other plants without withdrawing nutrients from them, and these ferns are said to be epiphytes that are present in Option A as the tropical ferns have many ornamental values, ecological values, etc.
Learn more about the ferns here.
https://brainly.com/question/9505707
#SPJ6
A student found that 3 grams of ammonia gas formed 3 grams of solid ammonia when the
temperature was lowered enough. Why did the solid ammonia and the ammonia gas have the same
mass?
Answer:
The mass of a substance is constant according to the law of conservation of mass.
Explanation:
According to the law of conservation of mass, matter can never be created or destroyed in a chemical reaction, even though it may undergo change from one physical state to another.
This means that in an isolated or closed system, the mass of matter will always be the same irrespective of the type of change that matter undergoes. This is so because, the mass of a substance is a measure of the quantity of matter in that substance and is constant. The number of particles does not change during a change of state, only their spacing and arrangement. In solid ammonia, the particles are more compact and arranged, whereas in gaseous ammonia, they are more randomly spaced out.
what is the role of RNA polymerase?
Answer:
an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription. ... For example, all species require a mechanism by which transcription can be regulated in order to achieve spatial and temporal changes in gene expressio
Explanation:
according to Google
Answer:
It helps transcribe the DNA strand. your welcome ;)
Explanation:
What is the temperature at the interface
between the mantle and the outer core?
What are two ways your model accurately shows your ideas on what happened to the pod?
PLEASE HELP QUICKLY THANK YOU
Answer:
a
Explanation:
When can plastics become garbage
Answer:
Normally, plastic items can take up to 1,000 years to decompose in landfills. Even plastic bags we use in our everyday life take anywhere from 10 to 1,000 years to decompose, and plastic bottles can take 450 years or more.
2- How do ecologists organize the environment?
Answer:
Ecologists generally organize the biological world in a nested hierarchy. Above the level of the individual organism, from the least to most inclusive, the levels of this hierarchy are the population, community, ecosystem, biome, and biosphere.
What happens when a cell reaches the Hayflick limit ? Why does this have to happen for the health of the cell?
Answer:
The Hay-flick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only replicate and divide forty to sixty times before it cannot divide anymore, and will break down by programmed cell death or apoptosis.
Plz help!?
Identify the part of the graph that shows:
Answer:
Answer in order: C, A, B
Explanation:
But I'm not the brightest at this subject, but what I did is just observed what I thought the answers were thoroughly by using the keywords and letters and then matching them together to make sense. I remember doing this, but let me know if it's wrong!
What makes up muscle tissue?
organisms
organ systems
organs
cells
Answer:
Cells is the correct answer!!
Explanation:
Muscle tissue consists of elongated cells also called as muscle fibers. This tissue is responsible for movements in our body. Muscles contain special proteins called contractile protein which contract and relax to cause movement. Muscle tissues vary with function and location in the body.
Hope This Helps!!
God Bless!!
~DuffyDuck~
Answer:
It's D. Cells
Explanation:
I did the Edge test!<3
What do the interactions of Earth, the moon, and the sun cause?
A. Earth's revolution
B. Earth's rotation
C. Eclipses and sunsets
D. Eclipses, moon phases, and seasons
Answer:
option d is right
pls mark me brainliest
D. Eclipses, moon phases, and seasons
HOPE IT HELPS YOU MATE ❤️
What can the reader conclude about homeostasis
Answer: Homeostasis helps animals maintain stable internal and external environments with the best conditions for it to operate. It is a dynamic process that requires constant monitoring of all systems in the body to detect changes, and mechanisms that react to those changes and restore stability.
What are the importance in applying fertilizer to a tree?
Answer:
It helps in growth of fruits or root faster .
Explanation:
If fertilizers is applied on trees , insect won't affect and soil will be fertilized for appropriate growth .
The cracking of rock due to heat is an example of _______.
a.
erosion
b.
physical weathering
c.
chemical weathering
d.
none of the above
Answer:
Physical weathering
Explanation:
Just did the quiz
Answer: B. physical weathering
Explanation: I can confirm the first person who answered! This answer is correct on edge2020 :)
In what type of cell does the cell wall take the place of the cell membrane ?
A. Plant cells
B fungi cells
C. Cell walls never take the place of a cell membrane
Answer:
Cell walls never take the place of a cell membrane
Explanation:
The cell wall has a texture that is tough, flexible, and occasionally hard and is found outside the cell membrane, hence option C is correct.
What is a cell wall?Plant cells' outside layer is called the cell wall. Only plants and some types of bacteria, fungi, and algae have cell walls.
Bacteria, algae, fungi, most plant cells, and certain archaea all have cell walls. A cell wall is a structure that surrounds the plasma membrane or cell membrane in cells that have them.
Cellulose or chitin are the main components of the cell wall, which is a stiff, semi-permeable structure.
Glucans, chitin, and glycoproteins make up the majority of the cell wall, which is a distinctive structure of the fungus.
Therefore, cell walls never take the place of a cell membrane.
Learn more about a cell wall, here:
https://brainly.com/question/965751
#SPJ2
In humans, to fold the tongue is a dominant trait (L), and the straight tongue is the recessive trait. What are the probabilities that the offspring can fold the tongue?
Explanation:
The given question is incomplete as the genotype of the parents is not given, so the answer is providing in the followings case: 1. dominant parent and recessive parent 2. heterozygous parents Answer: 1. dominant parent and recessive parent: dominant parents can be represented by LL and recessive parent is represented by II, so the gametes would be L, L and I, I. so, LL LI LI LI so there are all offspring in heterozygous condition as we known one or two dominant allele masks the recessive allele for the trait so 100% offspring can fold their tongue. 2. heterozygous parents In this case, parents have LI genotype and gametes would be L and I for each parent so, L I L LL LI I LI I|so there are all offspring in heterozygous condition as we known one or two dominant allele masks the recessive allele for the trait so 100% offspring can fold their tongue. 2. heterozygous parents In this case, parents have LI genotype and gametes would be L and I for each parent so, L I L LL LI I LI I| In this case, one is pure dominant and two heterozygous whereas only one is recessive the phenotype of offspring that cant fol the so, tongue would be: 75% = 3/4
What is an exmaple of a chemical reaction?
Answer:
Iron and oxygen combining to make rust
Explanation:
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
Consider a duplex molecule of length 10 Mb that has only one origin of replication located exactly in the middle. If replication proceeds bidirectionally, assuming that the rate of DNA synthesis is 1500 nucleotide pairs per second, the time needed for replication of this molecule is _____ minutes.
Answer:
Approximately 28 minutes.
Explanation:
Given:
Length of a duplex molecule of DNA = 10 mb
= 10 * 10^6 bases
So, it means each DNA has = 5 * 10^6 base pair
rate of DNA synthesis = 1500 nucleotide pairs per sec.
location of replication = at the middle which is 5 * 10^6/2
= At 2.5 * 10^6
solution:
As we know replication of DNA is a bidirectional process so it will synthesize in both directions and the rate is given is 1500 nucleotide per sec so the time required to replicate 2.5 * 10^6 in both directions will be from the formula
time = distane/rate
= 2.5 * 10^6/1500
= 1666.66 seconds
or, 28 minutes aprrox (27.77)
Which of the following is a true statement about fertilizers?
O Inorganic fertilizers supply some nutrients but mainly affect soil properties.
O Fertilizers guarantee a minimum percentage of nutrients and do not affect the properties of soil.
O Applying heavy amounts of fertilizer is always good for plants as it adds more nutrients.
The nutrient content of inorganic fertilizers is not well known.
Answer:
on my view its first one
Answer:
wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
Explanation:
