In the early 1900s, three species of goatsbeard wildflowers, T. dubius, T pratensis, and T. porrifolius, were introduced to the United States. Each of the species had a chromosome number of 2N. In the 1930’s, a few populations of offspring from the original wildflowers were identified as having a chromosome number 4N. What does this data suggest about speciation.
A. Speciation has occurred because the original species of wildflowers produced populations of viable offspring.
B. Speciation has occurred because breeding between the offspring and original populations would not be possible.
C. Speciation has not occurred because the offspring of the original wildflowers were not introduced into a new area.
D. Speciation has not occurred because the offspring inherited identical genetic information to the original wildflowers.
Answer:
B. Speciation has occurred because breeding between the offspring and original populations would not be possible.
Explanation:
Speciation has occurred in the species due to no breeding between the offspring and original populations because the offspring and original species has different number of chromosomes in their DNA. Due to this difference in the chromosome number in the DNA, there is no chance of breeding between offspring and original species. Speciation is the evolutionary process by which populations of organism evolve with the passage of time and become different from the original species.
if a man with type O blood marries a woman with type AB blood , what are chances that their first child will have type O blood
I think its a 0% chance because
xA xB
xi Ai Bi
y A B
Please help, This is a science sheet for get my grade up.
Answer:
Well The answer you choose was wrong I think because every living being that has cells need a Nulceus in their cells or the cells won’t work. Fungi have cells and Protista also have a nucleus since it has a cell or cells.
The answer here I would think would be (c) ”many could be found in fresh water”. Fungi don’t usually appear near seas or fresh sources which in this case is a pond and protistia do.
Photosynthesis occurs in the ______
aerobic cellular respiration occurs in the _______
and anaerobic cellular respiration occurs in the cytoplasm.
Answer:
Photosynthesis occurs in the chloroplasts aerobic cellular respiration occurs in the mitochondria and anaerobic cellular respiration occurs in the cytoplasm.
Explanation:
Don't know how to explain, but this is the right answer.
In many tropical rainforests, people clear land by cutting down trees and burning them. After a few years, the soil runs out of nutrients and cannot be farmed any longer. How does this affect Earth's atmosphere?
Answer:
Land will convert into desert eventually
Explanation:
When the soil gets devoid of nutrient, it will be unable to support trees, plants or vegetation of any type. Trees and plants are responsible for holding the soil tightly and prevent it from eroding.
Once there will be no nutrient in soil, there will be no trees, plants or vegetation and hence there will be no mechanism to prevent soil erosion. Thus, the soil will erode due to deforestation and the land will convert into desert eventually
What do the NADPH and ATP do in the Calvin cycle?
Answer:
ATP and NADPH produced by the light reactions are used in the Calvin cycle to reduce carbon dioxide to sugar. ATP is the energy source, while NADPH is the reducing agent that adds high-energy electrons to form sugar.
A friend of mine came to see me one day and told me a story of how he met his identical twin that he never knew about. When I questioned him about the details, I got some information about the two men.
John Smith (my friend)
DOB: 11/12/77
Height: 6’1
Eyes: Brown
Hair: Brown
Dave Jones (suspected twin)
DOB: 11/11/77
Height: 6’1
Eyes: Brown
Hair: Brown
What should I tell him about his twin?
I NEEEEEDDDDD HEEEELPPP PLEASE
Answer:
That is right, internal/external.
Explanation:
Examine the image that shows the folds in the lining of the small intestine. Which of the statements best describes the interaction between the small intestine and another organ based on the model shown here?
Answer: It’s C.) The increased surface area to volume ratio of the small intestine allows for the absorption of materials into the bloodstream more efficiently.
Explanation:
Male organisms will commonly engage in physical activity to show dominance during mating season. Male kangaroos can commonly be observed kicking one another, while bighorn rams will gather and crash their heads/rams into each other prior to mating season. This is an example of ______.
Question options:
competition
predation
commensalism
parasitism
Male kangaroos that kick one another and bighorn rams will gather and crash their heads into each other prior to mating season are examples of competition.
What is competition?Competition is a type of ecological relationship in which two organisms contend for the same resource (e.g., food).
Competition can be divided into intraspecific competition and interspecific competition.In general, intraspecific competition makes reference to competence for reproduction.In conclusion, male kangaroos that kick one another and bighorn rams will gather and crash their heads into each other prior to mating season are examples of competition.
Learn more in:
https://brainly.com/question/7413811
All of the following are needed for photosynthesis to occur EXCEPT
Select one:
a. carbon dioxide
b. sunlight
c. water
d. glucose
Mutations within a DNA sequence are natural processes that--
A are usually good.
B are usually bad.
C usually cause cancer.
D produce genetic diversity.
Answer:
D
Explanation:
Mutations can cause other species to occur, like polar bears. They also cause different genetic traits within a species like different hair color.
Answer:
d
Explanation:
it produces genetic diversity
4. While on the Galapagos Islands, Darwin observed variety in one type of
animal that was later used to help him form his theory of natural selection.
Which type of animal was this? *
Finches
Giant turtles
Lemurs
Bananas
Two interacting systems involved in plant transport are shown here. Which statement best describes the function of xylem and phloem in transporting substances throughout the plant?
Answer:
C. Xylem transport water and nutrients from the soil to the leaves while phloem transport carbohydrates from the leaves to the rest of the plant.
Explanation:
What might occur if the stoma were all located on the top of the leaves?
Answer:
It depends on the plant and its environment. In a mesic terrestrial environment, the plant wouldn’t be optimized. Natural selection would then come into play and there would be an evolutionary trend towards stomata located on the lower leaf surface.
In the case of water lily, the lower epidermis is in contact of the water, and stomata are restricted to the upper surface of the leaf. This is an optimal solution for the plant. Natural selection will work to conserve that arrangement. In this case, stomata on the lower surface would exist at a water-air interface, and the diffusion of gasses across that interface would be glacially slow. Further, the stomata on the lower surface would present an opening where pathogens can enter the leaf.
Explanation:
Hope this helps
PLEASE HELP ME ASAP!!
Earth Science - AP_EX
Answer:
do you like food?
Explanation:
hii pls help i’ll give brainliest
Answer:
They are unequal and act in the same direction. Also Reminder to be happy, go drink some water, eat some food and relax! You are loved :) <3
Explanation:
the part of a cell that contains genes.
A. Chromosomes
B. Motosis
C. Helix
Help ASAP
Which of the following correctly describes the process of cellular respiration?
O A. Carbon dioxide + sugar + sunlight + sugars + water
O B. Carbon dioxide + water + sunlight → sugars + oxygen
O C. Sugars + oxygen → energy + carbon dioxide + water
D. Sugars + carbon dioxide + energy + oxygen + water
Answer:
C
Explanation:
It is flu season! The flu is caused by a virus. Scientists continue to debate whether or not viruses are alive. If we consider the image of the flu virus seen here, we could say that a virus is NOT alive because https://www.usatestprep.com/modules/gallery/file.php?id=1531 for the picture
Answer: the answer is D
Explanation:
Answer: There is no cellular structure
Explanation: If we use the image to support our argument, we could say a virus s not living because there is no cellular structure. All prokaryotic cells lack a nucleus. We cannot tell, from the image, anything about its way of life.
In order for these runners to have an ample supply of nutrients sent to
all parts of their body, what are the two systems that function together
to perform this task?*
A. Digestive and Muscular
B. Digestive and Circulatory
C. Respiratory and Muscular
D. Respiratory and Circulatory
HELP PLEASE
Explanation:
B. Digestive and circulatory
hope it helps
How are traits
removed from
the gene pool?
A. Organisms with less desirable traits do not reproduce
B. Organisms with less desirable traits reproduce the most
please help its timed
Hello, jamesundercover06.
The first box, starting on the left, I believe, should be H2O. The second box, the one over the arrow, should be sunlight. The third box, right after the arrow, should be C6H12O6. The final box, then, should be O2. I'm pretty sure that this is right, but if it is incorrect in any way let me know and I will do my best to give you the correct answer.
PS. Brainliest would be appreciated. :)
Please help!!!!!!!!!!!!!!!!!!!!
Which term describes resistance to change in motion?
A. acceleration
B. inertia
C. net force
D. velocity
Answer:
Newton's second law of motion states that the accelaration of an object is directly proprotional to the force acting upon it. In symbols, we can write this as
[tex]F= ma[/tex]
Wher F is the force acting upon the object, m is the object's mass, and a is the object's acceleration. We can multiply both sides of this equation by 1/m to get the equivalent equation
[tex]\frac{1}{m} F= a[/tex]
What happens when we make m higher and higher? Well, that fraction 1/m gets closer and closer to zero. The same force accelarates the object less and less as that object becomes more massive. This consequence of Newton's second law, the resistance of massive objects to changes in acceleration, is called inertia, and it's one of the main expressions of mass in classical mechanics.
Answer:
acceleration
Explanation:
Which of the following is a fertilizer?
a) Compost
b)Malathion
c)Super Phosphate
d)Methaehlos
choose one
Answer:
Explanation:
Super phosphate is a fertilizer
Option C is the correct answer
Answer:
C.) Super Phosphate
Explanation:
Superphosphate is a fertiliser produced by the action of concentrated sulphuric acid on powdered phosphate rock
-TheUnknownScientist
How does oxygen travel through your lung to your muscles?
Answer:
The oxygen in inhaled air passes across the thin lining of the air sacs and into the blood vessels. This is known as diffusion. The oxygen in the blood is then carried around the body in the bloodstream, reaching every cell.
Explanation:
4. On the basis of what criteria did Linnaeus classify “natural bodies"
into his system?
Answer:
Metamorphism is the answer
What are the characteristics of sodium?
Answer:
it is a soft metal
it react In a low melting point with a relative density
it is luster
it is of silver and white colour
it have ductility
Which type symmetry applies to animals in the phylum Porifera?
A no symmetry
B bilateral symmetry
C radial symmetry
Answer:
A no symmetry
Explanation:
Answer:
c.) radial symmetry
Explanation: