Answer:
61 for Plate 1 ,
59 for Plate 2
Explanation:
Given that the original stock has a concentration of 6 * 10^6 infectious virus particles /mL
and it was diluted by 1:10000
New concentration = ( 6 * 10^6 ) / 10000 = 600 infectious virus particles/ mL
Also given that the virologist plates 100 mL of each sample
therefore; 0.1 mL has a count of 60.
The experimental results that he is most likely to observe in the duplicate plates will be ;
61 for (Plate 1) ,
59 for (Plate 2)
What two words best describe bacterial reproduction? Why?
Answer:
Produces, and Divides
Explanation:
Bacterial Reproduction is a single cell that divides into two identical daughter cells.
What causes the surface winds of a hurricane?
Answer:
The pressure at the ground is determined by the weight of the atmosphere above a point. ... So, it is the heat and humidity from the near-ocean air and sea spray that rises high into the hurricane, lowering the surface pressure, and causing winds to blow into the center.
Explanation:
because I said so
PLEASE HELP! I WILL GIVE BRAINLIEST. Explain the process of succession.
Explanation: Succession is a series of progressive changes in the composition of an ecological community over time. In primary succession, newly exposed or newly formed rock is colonized by living things for the first time.
Hope this helps!!
Plz Branliest!!
Have a great day!!
Bye!!
Unit 5 DQ 1 Debate on global warming The issue of global warming has become an unending debate. Which side of the debate are you in? Support your decision with one reference
Answer:
Global average temperatures have increased in evolving patterns in which cooler temperatures (shown in blues) have generally changed to warmer temperatures (shown in progressively intense reds).
The use of pesticides and fertilizers is carefully monitored because of the effect they can have on the environment. Which of the following is a possible negative effect of the use of these chemical on the environment?
A. These chemicals are expensive to produce.
B. Runoff carries these chemicals into lakes and streams.
C. Storage space for these chemicals is limited.
D. Theses chemicals cannot be purchased in large bulk.
The breeding of organisms over many generations in order to achieve a desirable phenotype?
Answer:
Selective breeding involves choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics. Humans have selectively bred plants and animals for thousands of years including: crop plants with better yields.
Explanation:
Hope that helps
Answer:ya
Explanation:
From his observations in the oceanic islands like the Galapagos, Darwin felt that: isolation is a significant factor in adaptation and speciation spontaneous generation is a significant factor in adaptation and speciation volcanic soils are a significatnt factor in adaptation and speciation inheritance of acquired characteristics is a significant factor in adaptation and speciation. none of these is correct
Answer:
isolation is a significant factor in adaptation and speciation
Explanation:
In the theory of evolution by natural selection proposed by Darwin, adaptation refers to the adjustment of organisms to their environments in order to increase their chances of survival in that environment. In the Galapagos Islands, Darwin observed that finches had different types of beaks adapted to the type of food they ate. From this observation, Darwin proposed that finches evolved to eat different food sources. In this case, the islands lead to an adjustment (evolutionary) process by which geographically isolated individuals accumulate genetic differences in order to adapt them to the environmental conditions in the islands, which then may also prevent breeding between individuals from different islands when they are reunited (i.e., it may also lead to speciation).
An example of natural selection is the peppered moth found in Europe. There are two color forms of this moth, shown in the diagram. Form X was more common before the industrial revolution covered the trees with smoke and dust. Form Y is more common after the industrial revolution. Which statement explains why these two color forms exist at the same time? *
Some organisms inherit traits enabling them to adapt better to the environment.
Some organisms acquire traits during their lifetimes that they pass to our offspring.
Some organisms do not reproduce as many offspring during their lifetimes.
Some organisms die before they reproduce offspring.
Which of these statements about Hox genes is true?
A. They regulate the development of body parts.
B. They occur in random places on the chromosome.
c. They were first discovered in mammals.
D. They are only involved in the development of embryos,
not adults.
Answer:
A. They regulate the development of body parts
Explanation:
I just did it on Savvas (Pearson)
The statement which is true about HOX genes is they regulate the development of body parts.
What do you mean by HOX genes?HOX genes may be defined as components of the homeotic transcription factor family that play a key part in controlling the body plan.
HOX genes play two important roles, which are given below:
Specifying the place where the limb of organisms forms.Specifying whether the particular mesenchyme cells will become stylopod, zeugopod, and autopod.Therefore, the statement which is true about HOX genes is they regulate the development of body parts.
To learn more about HOX genes, refer to the link:
https://brainly.com/question/22998796
#SPJ2
1. Look at the images below. Which two organisms do you think are most closely
related?
2. And why do you think this?
A deer and worm and turtle
Answer:
deer ans turtle
Explanation:
they both share the characteristics of four legs and a tail unlike thw worm
What is the main cause of Earth's global winds?
A. The equator receives more direct incoming solar radiation than the poles.
B. The depletion of the ozone layer causes more UV radiation to escape from Earth.
C. The air, water, and sand on Earth are evenly heated at the equator and the poles.
D. The average kinetic energy of air molecules decreases when solar radiation is received.
Answer:
c
Explanation:
because earth concerns water rain and sunshine
Answer:
C.
Explanation:
Our Earth concerns water, rain, and light (or sunshine)
In Drosophila, the linked mutations ebony body color (e), rough eyes (r), and brevis bristles (b), are autosomal recessive. A test cross yielded the following results:
wild type 169
ebony 619
ebony, rough 9
brevis 14
rough 93
ebony, brevis 97
rough, brevis 621
ebony, rough, brevis 165
Total 1787
1: Which locus is in somewhere between the other two?
a. ebony
b. rough
c. brevis
d. wild type
e. can not be determined from the information provided
2: What is the percentage of double cross overs?
Answer:
The correct answer is - 1) rough
2) [(9+14)/1786]* 100 = 1.2877 percentage
Explanation:
In this case there is mutated genes are :
mutated : ebony (e), rough (r) and brevis (b)
wild type: e+, r+ and b+
Given: wild type 169 (e+ r+ b+)
ebony 619 (e b+ r+)....... parent
rough, brevis 621 (e+ b r) .... parent
ebony, rough, brevis - 165 (e r b)
rough - 93 (e+ r b+)
ebony, brevis - 97 (e r+ b)
ebony, rough - 9 (e r b+) ....... double cross
brevis - 14 (e+ r+ b) ..... double cross
solution:
In this question, there is the three-point cross is performed, in such case, if one is mutated then the other two are normal. For instance, here ebony is mutated then the rest two are norma - e r+ b+.
We know the most frequent genotypes in such case, are parental and least frequent are double crossover genotypes. We can get the correct order of genes by the double-cross of parental genotypes and if we get double cross over then the gene order is correct.
(e b+ r+) -----------> (e r b+)
(e+ b r) ------------> (e+ r+ b)
double cross double crossover
between
parental gentype
Thus, the correct order is e r b that means rough is between ebony and brevis.
The percentage of double cross over =
(number of first double-cross + second double-cross over/1787)*100
[(9+14)/1786]* 100 = 1.2877 percentage
Which of the following are the products of respiration?
1)ATP, Water, and Oxygen
2)Carbon dioxide, Oxygen, and Water
3)ATP, Carbon Dioxide, and Water
4)Glucose, Water, and Carbon Dioxide
F-R-E-E P-O-I-N-T-S FOR EVERYONE
Answer:
K- T-H-A-N-K-Y-O-U
Explanation:
:))))
A gene is a small section of DNA on a chromosome.
Complete the sentences.
A gene codes for a particular sequence of...
This sequence makes a specific....
PLS SOMEONE DRAW ME Punnett square FOR THIS ASAP,
In mice, brown coat is dominant to black coat. If a pure breeding brown mouse is mated to a pure breeding black coated mouse, all of the offspring are brown. Fill in the Punnett square below to show this cross.
Answer:
Punnett square drawn below:
Explanation:
Sorry if it's messy. Since brown coat is dominant to black coat, that would mean that the genotype for brown is either Aa or AA. Since it says it's a pure breeding brown mouse and that all of the offspring are brown, that means that the genotype for the pure breeding brown mouse is AA. As for the black coated mouse, black is reccessive, meaning the genotype would be aa. So... AA x aa = 100% Aa
PLEASE ANSWER ASAP
Which functions are involved while eating a sandwich?
Answer:
respiratory, digestive, endocrine (i think)
Someone please help!
Don’t send links
pleaaaseeee helpp meeeeeee
Please answer as many as you can this is just a study guide
Answer:
01. the continued existence of organisms that are best adapted to their environment, with the extinction of others, as a concept in the Darwinian theory of evolution.
02. It shrinks as species begin fighting for resources.
03. The animal will experience a lack of growth.
04. Level 1: Plants and algae make their own food and are called producers. Level 2: Herbivores eat plants and are called primary consumers. Level 3: Carnivores that eat herbivores are called secondary consumers. Level 4: Carnivores that eat other carnivores are called tertiary consumers.
Explanation:
Mushrooms, bread molds, and yeasts are classified together in the fungi kingdom. Specific characteristics are used to
classify these organisms. Which of the following is a characteristic used to classify these organisms as fungi?
Answer:
D.) They are heterotrophs
Place the following cell types in the order they are shown to appeared on earth
Answer:
1. Prokaryotic (about 3.5 to 3.8 billion years ago)
2. Photosynthetic (about 3.4 billion years ago)
3. Eukaryotic (about 2.7 billion years ago)
4. Aerobic (about 2.5 billion years ago)
5. Anaerobic (about 2.4 billion years ago)
6. Multicellular (about 600 million years ago)
Explanation:
I am not completely sure but my research indicates the following in chronological order from the oldest to the newest:
1. Prokaryotic (about 3.5 to 3.8 billion years ago)
2. Photosynthetic (about 3.4 billion years ago)
3. Eukaryotic (about 2.7 billion years ago)
4. Aerobic (about 2.5 billion years ago)
5. Anaerobic (about 2.4 billion years ago)
6. Multicellular (about 600 million years ago)
Disclaimer: My answer may be incorrect because I am not completely sure but I think this is right.
If you are fine with it, I would appreciate if I got the brainliest answer :)
According to the question the sequence of the cell type is as follows:
Prokaryotic (Approx 3.5 to 3.8 billion years ago) Photosynthetic (Approx 3.4 billion years ago) Eukaryotic (Approx 2.7 billion years ago) Aerobic (Approx 2.5 billion years ago) Anaerobic (Approx 2.4 billion years ago) Multicellular (Approx 600 million years ago)How did life begin and evolve on Earth?Many scientists consider that RNA, or similar to RNA, was the first molecule on Earth to self-replicate and initiate the process of evolution that led to more advanced forms of life, including human beings.
Thus, the correct sequence is that.
To learn more about life on earth click here:
https://brainly.com/question/807910
A woman with type AB blood is married to a man with type O blood.
They have two natural children and one adopted child. Damian has blood type A, Infiniti has blood type B, and Jordan has blood type O.
Which child was adopted?
Explain to your best ability, please.
Answer:
Jordan
Explanation:
In most cases, an O parent and an AB parent will have only A or B kids.
What processes and what form is carbon released from all organisms?
What is the difference between osmosis and diffusion:)
what two changes would decrease the density of ocean water
Answer:
the temperature of the water and the salinity of the water
Answer:
There are two main factors that make ocean water more or less dense than about 1027 kg/m3: the temperature of the water and the salinity of the water.
Explanation:
4. Start over and run the simulation for 5 generations with NO wolves, THEN add wolves.
Explain what happens.
Answer:
Adding the wolves would likely decrease the population of prey in the simulation.
Explanation:
25 points please help !!!!!
How can friction be lessened?
A). Add less force
B). Add more force
C). increase the speed
D). add wheels
why are minerals important for our body? describe the 2 groups of minerals
Minerals are needed for the proper composition of body fluids, including blood, and for the proper composition of tissues, bone, teeth, muscles and nerves. Minerals also play a significant role in maintaining healthy nerve function, the regulation of muscle tone, and supporting a healthy cardiovascular system. There are two kinds of minerals: macrominerals and trace minerals.
Explanation:
.