Answer:
the answer is A. E. coli B
Explanation:
The multiplicity of infection (MOI) refers to the ratio between the numbers of viruses used to infect E. coli cells and the numbers of these E. coli cells. Benzer carried out several experiments in order to define the gene in regard to function. Benzer observed that E. coli strains with point mutations could be classified into two (2) complementary classes regarding coinfection using the restrictive strain as the host. With regard to his experiments, Benzer observed that rII1 and rII2 mutants (rapid lysis mutants) are complementary when they produce progeny after coinfect E. coli K (where neither mutant can lyse the host by itself). The rII group of mutants studied by Benzer does not produce plaques on E. coli K strains that carry phage λ (lysogenic for λ), but they produce plaques on E. coli B strains. This study showed that rIIA and rIIB are different genes and/or cistrons in the rII region.
Which process moves small rock pieces during sedimentary rock formation?
Answer: The process that moves small rock pieces during the sedimentary rock formation is erosion. The carrying away of small rock particles by the effect of wind, water, or ice. It is a surface phenomenon on the earth's crust and then transportation takes place.
Explanation: I hope this helps!
( I'm confident have a great day!)
Give the types of bacteria.
Studying the embryology of animals provides important evidence to support claims of shared evolutionary history. What feature of embryology makes it capable of providing data for common evolutionary history not readily available from other sources?
A)As the embryo develops, it reveals the expression of genes.
B)The growth of the embryo is achieved by differentiation of cells.
C)A developing embryo exhibits structures not present in the adult animal.
D)The development of embryos of a certain species is consistent.
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HELPPPPP!!
Which of the following about X-linked traits is true?
O (D) They can passed from father to son
O (A) There are more genetic diseases carried by the Y chromosome than the X chromosome
(C) None of the other choices are correct
O (B) They generally affect more males than females
Answer:
D
Explanation:
because is formed from father to son
Which organelle is like the brain of the cell? vacuole O endoplasmic reticulum O cytoplasm O nucleus
Answer:
nucleus
Explanation:
i remember this from science.
Nucleus is the main control center of the Cell.
Laypeople often misunderstand anatomical terminology. What do you think people really mean when they say they have "planter's warts"?
Answer:
I don't know
Explanation:
wait is this like for an assignment or sum?
What will result if a frog lays eggs that are never fertilized?
A.The eggs will not produce offspring.
B.The eggs will develop into tadpoles.
C.The frog will start giving live birth to offspring.
D.The frog will mate less often.
Answer:
A. The eggs will not produce offspring
Explanation:
All living things require fertilization in some form
PLEASE HELP During a lunar eclipse, what is the penumbra?(1 point)
A. It is the part of the moon’s shadow where the sun is completely blocked.
B. It is the part of Earth’s shadow where the sun is completely blocked.
C. It is the part of Earth’s shadow where the sun is only partially blocked.
D. It is the part of the moon’s shadow where the sun is only partially blocked.
Answer:
B
Explanation:
Premed students are often traumatized by studying for their MCAT exam, which historically was always taken at the end of their Junior year in college. Now, many medical schools desire a meaningful gap year between completion of an undergrad degree and entrance to medical school so that incoming students have some sort of life-time experience either working, doing research, charity outreach, or traveling during that time. As a result, modern pre-med students often wait to study for their MCAT until after they graduate without realizing that it means they will end up taking two gap years, not one. Students who complete a basics genetic course should be confident with their knowledge about DNA, RNA, and proteins, along with how to solve basic inheritance problems, which will help them on their MCAT exams. Introductory Genetics helps to reinforce concepts taught fleetingly in Introductory Biology.
1. Jiro is told that a bacterium contains a single DNA chromosome containing 15% guanine and then is asked to decide if the organism is âGCâ rich or not (>50% G-C content = 'rich')). With full confidence, Jiro responds:
A.Heck no! The strand has a GC content of 30%.
B.Heck yeah! The strand has a GC content of 70%.
C.Heck no! The strand has a GC content of 15%.
D.It contains exactly 50% GC content.
2. If Marisol isolates 15% guanine from a strand of DNA, she can say with full confidence that:
A.the strand is made up of 70% pyrimidines.
B.the strand is made up of 30% pyrimidines.
C. the strand is made up of 50% pyrimidines and 50% purines.
D.the strand is made up of 70% purines.
3. Jayson is asked if a strand of DNA that is GC-rich will be harder to separate than one that is GC-poor. He responds with full confidence:
A. No!
B.Yes!
C. This question is irrelevant since double-stranded DNA is always easy to separate due to the hydrogen bonds that hold them together.
D.After 150 years of research into DNA, no one knows the true answer to this question.
Answer:
1. A
2. C
3. B
Explanation:
1. The DNA here has a Guanine(G) content of 15% and as G is equal to C,
[tex]$GC=G+C$[/tex]
= 15% + 15%
= 30%
As the GC content is less than 50 % , so the DNA is not a GC rich DNA. Therefore, for a DNA to be GC rich in content, G+C should be more than 50%.
Therefore the correct option is (A), The strand has a GC content of 30%.
2. With a content of 15% Guanine, we calculate the proportions of the four bases. They are :
[tex]$A+T=G+C$[/tex] and [tex]$A=T, G=C$[/tex]
∴ [tex]$A+T=15\% +15\%$[/tex]
[tex]$=30\%$[/tex]
So when we substract 30% from 100% , we get 70%. Now this 70% is then distributed in the equal proportions for [tex]$A$[/tex] and [tex]$T$[/tex].
Therefore, we have:
[tex]$A=30\%, T=35\%, G=15\%$[/tex] and [tex]$C=15\%$[/tex]
Therefore we calculate the content of purines [tex]$(A,G)$[/tex] and pyrimidines [tex]$(C,T)$[/tex].
Purine content : [tex]$A+G = 35\% + 15\%$[/tex]
[tex]$=50\%$[/tex]
Pyrimidine content : [tex]$C+T=15\%+35\%$[/tex]
[tex]$=50\%$[/tex]
Therefore, the correct option is (C).
3. Yes, the GC rich strand of the DNA is more stable the a GC low content DNA. But this stability is not due to the hydrogen bonds, it is mainly due to the stacking interaction known as base stacking.
So the correct option is (B).
Many rainforests are found in the tropics, but only a few are found in cooler temperate zones. What makes a forest a rainforest?
A. They always contain very large rivers or lakes.
B. They produce more oxygen than normal forests.
C. They have a canopy of trees and a great deal of precipitation.
D. They have a large variety of animals that are not found elsewhere.
Suppose your friend investigated the color of pea pods and concluded that green pods (G) were dominant over yellow pods (g). What experimental evidence would be needed to support this conclusion?
Which of the following courses would NOT be part of the curriculum for someone studying to be a botanist? Native Flora Native Fauna Exotic Dendrology Plant Systematics
Answer: The correct answer is Native Fauna
Explanation: This answer has been confirmed correct.
Native Fauna refers to animals.
1. which of the following organisms is not a strepsirrhines?
The California Mussel ( Mytilus californianus ) is the natural prey of the shore crab ( Carcinus maenas ). Study the graph above. Why would a crab adapt to having larger claws according to the graph?
a. Larger claws would help the crab camouflage in the rocks so the mussels won’t see them.
b. Larger claws would help the crab swim fast in a rough current toward where the mussels are hiding.
c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.
d. Larger claws would scare away the mussels with thicker shells causing the crabs to choose a new food source.
Answer:
The correct answer is - c. Larger claws would help the crab crack open the shells of the mussels so the crab can eat them.
Explanation:
The graph (attached) states that the two variables size of claws of the crabs depends on the thickness of the shell of mussels. With the increase in the thickness of the shell of the mussels the size of the claws of crabs also increases and becomes larger.
The most likely explanation of this change would be adapting according to the change in the shell of the crab as they require to crack their shell to eat them as mussels are the primary food source of these crabs.
Can animals perform
photosynthesis?
No
Yes
Answer:
No
Explanation:
animals are heterotrophic meaning they can't produce their own food.
Daniel was a prophet of God both to God's captive people and to all of the following gentile kings except:
Nebuchadnezzar
Darius
Xerxes
Belshazzar
Daniel was a prophet of God both to God's captive people and to all of the following gentile kings such as Nebuchadnezzar, Darius, and Belshazzar except Xerxes. Thus, the correct option is C.
Who was Daniel?Daniel is the main character of the Book of Hebrew Bible. According to the Hebrew Bible, Daniel was a noble Jewish of the Jerusalem, who was taken into captivity by the Nebuchadnezzar II of Babylon, who later serves the king and his successors with loyalty and ability until the time of the Persian king Cyrus, all the while remaining true to the God of Israel.
The consensus of one of the most modern scholars is that Daniel is not a historical figure according to the Bible and that the book is a cryptic allusion to the reign of the 2nd century BCE Hellenistic king Antiochus IV Epiphanes.
Daniel was a prophet of God and all the gentile kings like Nebuchadnezzar, Darius, and Belshazzar except Xerxes.
Therefore, the correct option is C.
Learn more about Bible here:
https://brainly.com/question/10322222
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Which organisms transfer nitrogen into a form that is useful to plants?
Answer:
Nitrogen-fixing bacteria are a type of organisms that transform nitrogen to a form that is useful to plants. These microorganisms are capable of transforming atmospheric nitrogen into fixed nitrogen.
Explanation:
Ferns obtain their food:
from spores
from the ground
by photosynthesis
from other plants
NEED HELP NOW
Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules is immunoglobulin G (IgG). Two heavy chains and two light chains form one IgG molecule. Classify each statement as describing the heavy chains, light chains, or both chains of IgG
a. form the antigen-binding site
b. contain multiple variable domains
c. are found in the Fab fragment
d. are found in the FC fragment
e. contain only one constant domain
f. contain multiple constant domains
g. contain only one variable domain
Answer and Explanation:
a. form the antigen-binding site ⇒ both chains
The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.
b. contain multiple variable domains ⇒ none
Both chains - light and heavy - contain only one variable domain (VL and VH).
c. are found in the Fab fragment ⇒ both chains
The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.
d. are found in the FC fragment ⇒ heavy chains
The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.
e. contain only one constant domain ⇒ light chains
Each light chain contains one variable domain (VL) and one constant domain (CL).
f. contain multiple constant domains ⇒ heavy chains
Each heavy chain contains three constant domains: CH¹, CH² and CH³.
g. contain only one variable domain ⇒ both chains
Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.
Explain the relationship between crossing over and genetic variation
Answer:
When homologous chromosomes form pairs during prophase I of meiosis I, crossing-over can occur. Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. It is obviously another source of genetic variation in offspring.
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Can someone help me out
Answer:
I think meteor or asteroid. I may be wrong but I'm trying to help out!
Some dog foods contains corn and wheat that provide the dog with carbohydrates. Which claim explains why carbohydrates are important to cell processes? Group of answer choices They make amino acids. They form cell membranes. They help chemical processes happen. They are a source of energy.
Answer:
they are the sourse of the energy
Explanation:
Which two atoms form an ionic bond?
A. Sodium and bromine
B. Two oxygen atoms
C. Two sodium atoms
D. Fluorine and chlorine
Many Learners Perform Well In Grade 12 But still not accepted into Universities.Explain Two Reasons For This
Answer:
1. Confusion
2. Financial issue
Explanation:
1. The reason I say this is that many of them are not really sure about what they want they want to do in their later future making them a little confused on what to do.
2. It is a common issue which has taken away so many bright minds away from their future in helping the world and their individual community to prosper in different ways.
The reason why many students from grade 12 are not accepted in universities is that they may not be ready to pursue a given career or their parents may not be able to afford it.
Why are grade 12 students not accepted in universities?In the whole of North America, grade 12 is the senior class or the highest class in high school.
Some grade 12 students may not be admitted into university even though they performed well because;
Some of the students who have finished well in grade 12 do not yet have clear cut career orientations.Also, some of them may not have parents that can afford to send them to the university.Hence, a good performance in grade 12 do not guarantee university admission.
Learn more about grade 12: https://brainly.com/question/11958048
All of the visible color light waves together make up white light.
Answer: True
TRUEEEEE!!!!!!!!!!!!!!!!!!!
Answer:
True
Explanation:
Think of the Pink Floyd logo lol
Explain the three mechanism for how activated transcription factors can stimulate transcription through modification of the chromatin structure.
What are the signs and symptoms of mumps?
Answer:
The primary sign of mumps is swollen salivary glands that cause the cheeks to puff out. Other signs and symptoms may include:
Pain in the swollen salivary glands on one or both sides of your face
Pain while chewing or swallowing
Fever
Headache
Muscle aches
Weakness and fatigue
Loss of appetite
when a cell goes through mitosis and cell division, the two new cells have _?
Answer:
D
Explanation:
since in mitosis, the cell has 23 pair of chromosomes, after the cell division process called mitosis, it divides into 2 cells that have 23 pairs of chromosomes
In garden peas, tall (T) vine is dominant over short (t) vine, and round pea pod (R) is dominant over wrinkled pea pod (r). Cross an h0m0zygous tall, round pea plant with an h0m0zygous short, wrinkled pea plant. Show the genotypes and phenotypes of the F1 offspring and the probability of each.
__________ Genotype of the h0m0zygous tall, round pea plant
__________ Genotype of the h0m0zygous short, wrinkled pea plant.
Answer:
TtRr - 100%
Explanation:
This question involves two different genes in pea plants. One gene is coding for height and the other for pea shape. The allele for tallness (T) and round (R) pea is dominant over the allele for shortness (t) and wrinkled (r) peas.
According to this question, an h0m0zygous tall, round pea plant (TTRR) is crossed with an h0m0zygous short, wrinkled pea plant (ttrr). The following gametes will be produced by each parent:
TTRR - TR, TR, TR, TR
ttrr - tr, tr, tr, tr
Using these gametes in a punnet square (see attached image), the following proportion of offsprings is produced in the F1 generation: All or 100% TtRr
TtRr will be phenotypically tall and round.
if a mother has the following alleles for a gene - Bb - what would her gametes look like?
Answer:
half of the gametes would have B and the other half would have b
Explanation: