Answer:
The correct answer is - 3/16 or 18.75% portion will be resistant to both Bt and DDT.
Explanation:
It is given that bollworms that are susceptible to Bt are represented by either RR or Rr and resistance one are shown by rr genotype and bollworms that are resistant to DDT are represent TT or Tt genotype and susceptible to DDT have tt genotype.
Cross: RR tt with rr TT
Gametes: Rt and rT
F1 cross:
RT
rT RrTt ( susceptible Bt and resistant DDT)
F1 Cross with F1
Gametes: RT, Rt, rT and rt
cross:
RT Rt rT rt
RT RRTT RRTt RrTT RrTt
Rt RRTt RRtt RrTt RrTt
rT RrTT RrTt rrTt rrTt
rt RrTt Rrtt rrTt rrtt
The bold genotypes are the three out of 16 that are resistant to both DDT and Bt.
CFCs are safe on Earth's surface but become very destructive to ozone when exposed to UV
light in the upper ----------? Upper what
Answer:
CFCs are broken down by UV photolysis, but the process takes a long time since it takes decades to cycle all of the air in the troposphere through the upper stratosphere. ... The photolysis of CFCs generates a highly reactive chlorine atom that can attack ozone or form compounds that destroy ozone. upper stratosphere should be your answer
A particular region is experiencing a viral epidemic. Which of the following would increase the likelihood of the epidemic becoming a pandemic?
A.A vaccine is developed that prevents individuals from being infected
B. Neighboring populations have little to no immunity to the disease.
C.The infection can be spread only by direct contact from one person to another
D.The region is remote and experiences little to no tourism.
PLEASE ANSWER ALL
question 21
An animal that only eats the flesh of another animal is called a
A. producer
B. herbivore
C. carnivore
D. omnivore
______________________
question 22
Which of the following statements is true about matter and energy:
A. matter is not recycled, energy is not recycled
B. matter is recycled, energy is not recycled
C. both matter and energy are recycled
D. neither matter nor energy are recycled
______________________
question 23
On what trophic level would you find organisms that use the suns energy directly to make their own food?
A. 1
B. 2
C. 3
D. 4
_______________________
question 24
Which of the following is an abiotic factor in an ecosystem?
A. bird
B. tree
C. rock
D. deer
______________________
question 25
Mushrooms and other fungi are responsible for breaking down dead organic matter. In the ecosystem, they are called:
A. producers
B. comsumers
C. decomposers
D. scavengers
HELP ASAP!! 5 MINUTES LEFT!!
What stimulates the release of the enzyme amylase into the pancreatic duct so that it can break down starches?
A. acetylcholine molecules from a nearby neuron
B. the breakdown of glucose in the chloroplast
C. the division of the cell
D. the presence of protein in the stomach
E. a decrease in the volume of the large intestine
Answer:
B. the breakdown of glucose in the chloroplast
Explanation:
Answer:
B
Explanation:
I Took the test and got a A
Hope this helps:-)
Ángel es un cerdo??
a) Sí
b) Obvio que sí
c)n op orque si es el el uqe no tiene pecho
From what blood vessel does the blood that flows through the
grafted blood vessel come?
Are all genetic mutations harmful?
Answer:
yes.....
Explanation:
because of metal and motions that are formed!!
Help I’ll give you brainilist.
The initial release of sulfur dioxide and nitrogen oxides creates BLANK pollution.
Answers To Fill In BLANK: Air, Ground, Noise, Light, Water.
These compounds chemically react to create acid rain which falls back to Earth, polluting both BLANK. It can even cycle back to the atmosphere through evaporation.
Answers To Fill In BLANK: Ground and Noise, Noise and Light, Light and Water, Water and Ground, Air and Light.
Answer:
The initial release of sulfur dioxide and nitrogen oxides creates water pollution.
These compounds chemically react to create acid rain which falls back to Earth, polluting both Water and Ground. It can even cycle back to the atmosphere through evaporation.
Pls help me awnser these questions guys
Answer:
I cant really see the questions....
Explanation:
Please select the word from the list that best fits the definition
plants that require 12 or more hours of darkness to flower
long-day plants
gibberellins
stimulus
cytokinins
day-neutral plants
photoperiodism
short-day plants
abscisic acid
tropism auxin
photosynthesis
respiration
Which of the following would be an example of positive feedback? thanks!
Select one:
Shivering by the muscles when temperature drops.
The attraction of platelets when a wound occurs.
Sweating due to an increase in body temperature.
The reduction of hormone production during pregnancy.
Answer:
2
Explanation:
The attraction of platelets when a wound occurs indicates a positive feedback. The correct option is B.
What is feedback mechanism?The feedback mechanism is the body's mechanism for keeping hormone levels within desired limits.
The feedback mechanism is activated by an increase or decrease in hormone levels. The body has two types of feedback mechanisms: positive feedback mechanisms and negative feedback mechanisms.
Positive feedback loops and negative feedback loops are the two types of feedback loops.
Positive feedback increases system output, causing growth or decline. Negative feedback dampens output and helps to keep the system stable around an equilibrium point.
Platelet plug formation is thought to be a positive feedback process because ADP and VWF levels rise as more platelets activate to form the plug.
Thus, the correct option is B.
For more details regarding feedback mechanism, visit:
https://brainly.com/question/15574460
#SPJ2
12 Grizzly bears are classified in the order Carnivora. Their diet consists of roots,
tubers, berries, nuts, fungi, insects, rodents, and fish. What ecological role best
describes grizzly bears?
What
Earth
What
A carnivores
C herbivores
Accord
B omnivores
D producers
Answer: the answer is
B: omnivores
What is the ductus arteriosus?
Answer:
the ductus arteriosus is a normal blood vessel that connects two major arteries — the aorta and the pulmonary artery — that carry blood away from the heart. The lungs are not used while a fetus is in the womb because the baby gets oxygen directly from the mother's placenta.planation:
Answer:
Heyaa!! My name is Pinky!! I'm here to inform you that your answer is....
Explanation:
!!! A Ductus Arteriosus is a heart defect caused by problems in the heart's development. !!!
!!! Patent ductus arteriosus (PDA) is an opening between two blood vessels leading from the heart !!!
Have An Amazing Day!!!
~Pinky~
Need help again ASAP
What does the data reveal about the relationship(s) between the impactor's mass and crater depth?
Answer:
For each ball, the crater diameter increased as the height of the ball drop increased. My conclusion is that crater diameter increases with increasing mass. Also as the height of the ball increases, so does the crater diameter. Thus crater diameter is proportional to the mass and velocity of the impactor.
Explanation:
correct me if im wrong!:-)
which two types of natural resources are required to make bottled water?
A. metals
B. fossil fuels
C. living things
D. freshwater
Answer:
B. fossil fuels
A. metals
Explanation:
Answer:
Fossil fuels and Freshwater
Explanation:
took the test
Do you think there should be government regulation against known carcinogens? Why or why not? Write a 5-6 sentence paragraph that states your opinion and explains the reasons for it.
Answer:
Yes,there should be government regulation against known carcinogens;
Because of following reason;
food containing carcinogens cause food poison,cancer and effect our health negatively.it degrades the immunity power of us which makes us weak.if regulations is made people be awared and stop consuming those type of food.people start to consume good diet.Answer:
Yes. I believe that there should be government regulation against known carcinogens. Take food into consideration. Before President Roosevelt passed the first Food and Drug Act, mothers would quite literally feed their children formula that could have heroin in it or any unregulated substance, because companies could do so without any repercussions. Meat factories were dangerous and its no secret that there were a significant amount of rats that fell into the meat. After this act was passed in the United States, factories cleaned up their conditions and food became somewhat safe to eat. This act protected the consumer and made them aware of what they were literally consuming. Why is this different from government regulation against carcinogens? Did you know that bug spray can contain carcinogens? Old fridges? Granite countertops? Weedkiller? Because I did not. Consumers should be aware of the contents of the things they are buying. Corporations SHOULD be held responsible for putting customers in harms way. Government legislation should be passed to protect those who do not know better. Because we should not have to know better. We should already know.
Explanation:
Will give brainliest
In the producers pool, in which molecule is the carbon found
Answer:
Carbon is found in almost everything so I would assume a lot
Explanation:
Btw I dont know what the producers pool is
Help is needed please
Answer:
Genotypes are listed in the right column of the table, while phenotypes are on the left.
There are more genotypes than phenotypes for blood types because multiple genotypes that can result in 1 phenotype
Explain the role of insulin in the homeostatic regulation of blood glucose levels
Answer:
Insulin helps the cells absorb glucose, reducing blood sugar and providing the cells with glucose for energy. When blood sugar levels are too low, the pancreas releases glucagon. Glucagon instructs the liver to release stored glucose, which causes blood sugar to rise.
Hope this helps!
What causes low pressure? What causes high pressure?
Answer:
What causes low blood pressure?
Common causes of low blood pressure include a reduced volume of blood, heart disease, and medications. The cause of low blood pressure can be determined with blood tests, radiologic studies, and cardiac testing to look for heart failure and arrhythmias
Explanation:
What triggers high blood pressure?
Common factors that can lead to high blood pressure include: A diet high in salt, fat , and/or cholesterol . Chronic conditions such as kidney and hormone problems, diabetes, and high cholesterol. Family history, especially if your parents or other close relatives have high blood pressure
Non vascular plants are quite commin in the forests along the coast of Norther California but are relatively rare in the ecosystems around Davis in the Central Valley. What aspects of the life cycle of these plants make it difficult for them to reproduce on our area
Answer:
The Central Valley of northern California is a region where there is little water supply, while nonvascular plants cannot efficiently store water and they have primitive traits that are dependent on water for reproduction.
Explanation:
The Central Valley of northern California is characterized to have little natural precipitation/snowmelt during the dry summer months. In addition, California's climate also has extended periods of drought. On the other hand, non-vascular plants such as mosses and liverworts, are a type of plant that lacks vascular tissues (xylem and phloem), and they also lack true roots, stems, or leaves. These plants cannot efficiently absorb and store water (which fundamental for survival), and thereby the success of these plants in establishing and reproducing in the ecosystems of the Central Valley is limited to their physiological tolerance to desiccation. Moreover, non-vascular plants may also exhibit primitive traits related to their reproductive cycle (e.g., a flagellated sperm) that are dependent on water for reproduction.
why do you need to take biology in college if your major is Nursing?
What type of plants commonly grows in the lower biomes of a mountain? (1 Punto)
Answer:
Alpines, Mosses, Lichens etc
Explanation:
These type of plants survive in very harsh conditions in which the mountain regions are associated with.
The conditions include a higher degree of temperature, little or no amount of soil particles, dryness and a very low degree of nutrients available to them which makes their growth usually stunted when compared to plants in other regions.
Will give brainliest
In the atmosphere pool, in which molecule is the carbon found
If a star is shown to be 33.11 trillion kilometers away, how many light years would that be?
light years
Answer:
3.5
Explanation:
What type of mutation causes down syndrome? (point, frameshift, deletion, insertion, etc.) -- Why is it categorized as this type of mutation?
Trisomy 21: About 95% of people with Down syndrome have Trisomy 21. With this type of Down syndrome, each cell in the body has 3 separate copies of chromosome 21 instead of the usual 2 copies. Translocation Down syndrome: This type accounts for a small percentage of people with Down syndrome (about 3%).
cdc
А what
is an opening in Earth's crust that leads to a pool of molten rock
beneath the crust.
O landslide
O earthquake
volcano
flood
Answer:
volcano flood
Explanation:
it's right I took the test
Can anyone please help me write my research paper on the use of vaccines please ?
3 reasons why nuclear fusion energy could save the world from climate disaster
Answer:
-Its hydrogen-like fuel is available in virtually limitless quantities
-it produces no greenhouse gases
- no long-term radioactive waste and carries no risk of meltdown
Which level of organization involves an organism’s use of the mouth, saliva, teeth, stomach, intestines, liver, and pancreas to break down food?
Select one:
Organ.
Cell.
Organ system.
Tissue.
Answer:
The organ system
Explanation:
All those things you mentioned are part of the organ system, they work together.