Select all that apply. The first known pandemic in A.D. 542, struck which parts of the world?
Australia
Middle East
North America
South America
Asia
North
Africa
Europe
Answer:
Isn't it all of the above-- correct me if I am wrong!!
Explanation:
Luv you <3
NEED HELPP ASAP
Which of these is the best explanation for why the rock on the ocean floor and the rock on the continent are
NOT the same age?
There has been a lot of erosion on the continent and the older rock has been washed away.
There has been a lot of erosion on the ocean floor and the older rock has washed away.
Due to the movement of the plates, the rocks that make up the ocean floor are pulled inside the earth
more often and are much younger.
Answer:The continental crust is less dense so the oceanic crust subducts back to the mantle. This process explains why the younger rocks are found on the ocean floor. 24.
Explanation:
the result of successful mitotic division (three words)
Body Cells are
O A) 1N
O B) 2N
O C) 4N
OD) 21N
Answer:
B) 2N
Explanation:
Body cells have 46 chromosomes and are called 2N cell. It's a diploid cell.
2N = 4 chromatids. During meiosis, the 2N cell divides into 4 nonidentical 1N cells.
**anatomy & physiology question**
if you are at a 60X magnification and the field diameter is 3.2mm an object that's about 1/4th the size of the field diameter what is the size of the object?
Answer:
0.8mm.
Explanation:
If the size of an object is about 1/4th the size of the field diameter so the size of an object is 0.8mm because the fourth part of field diameter is equals to 0.8mm. Due to knowing field diameter of microscope we can calculate the real size of objects that is too small which can't be seen with the naked eye. So one fourth part of field diameter is equal to 0.8mm.
Worst tsunami in modern times
plz HELP
Answer:
Maule, Chile 2010: Chile and other countries.
Explanation:
I am really smart but not inna nerdy way and i already learned about this so here ya go :)
Please I need Help!!
● Prophase I
● Metaphase I
● Anaphase I
● Telophase I
● Prophase II
● Metaphase II
● Anaphase II
● Telophase II
Answer:
Its in this order: 3 - 4 - 1 - 6 - 5 - 7 - 2 - 8
Explanation:
I learned this a while ago so I would know
1. A dominant gene (A) causes yellow color in rats, the dominant allele on another independent gene (R) produces black coat color. When the two dominants occur together (A_ R_) they interact to produce gray coat color. Rats of the genotype aa are cream-colored. If a gray male and a yellow female, when mated, produce offspring approximately 3/8 of which are yellow, 3/8 gray and 1/8 cream, and 1/8 black, what are the genotypes of the parents
Answer:
Parents: Yellow (Aarr) and Grey (AaRr)
Explanation:
Given:
allele A = yellow
allele R = black,
Heteroozygous = gray
Genotypes of the parents:
yellow (Aarr) - female
gray (AaRr) - gray
cross between these
Parents: Yellow (Aarr) and Grey (AaRr)
Gametes: (Ar, ar) and (AR, Ar, aR, ar)
F1 (Punnet square)
----|----- AR ------|------- Ar ------|------ aR -----|----- ar
Ar | AARr (gray) | AArr (yellow) | AaRr (gray) | Aarr (yellow)
ar | AaRr (gray) | Aarr (yellow) | aaRr (black) | aarr (cream)
Ratio: 3/8 yellow : 3/8 gray : 1/8 cream : 1/8 black
The development of specialized cells from unspecialized stem cells is a description of which of the following basic life processes?
Answer:
Differentiation
Explanation:
Differentiation in a life process is a form of life forming process which is common in multicellular development.
It involves cell transforming from specialized cells to unspecialized stem cells combined with unique formation and functional qualities
Hence, the development of specialized cells from unspecialized stem cells is a description of DIFFERENTIATION of basic life processes?
In humans, two abnormal conditions, cataracts in the eyes and excessive fragility in the bones, seem to depend on separate dominant genes located on different chromosomes. A man with cataracts and normal bones, whose father had normal eyes, married a woman free from cataracts but with fragile bones. Her father had normal bones. What s the probability that their first child will a) be free from both abnormalities b) have cataracts but no fragile bones c) have fragile bones but not cataracts; d) have both cataracts and fragile bones
Answer:
a) 1/4 or 25%
b) 1/4 or 25%
c) 1/4 or 25%
d) 1/4 or 25%
Explanation:
Both cataracts and bone fragility are dominant conditions and are independently inherited. Let cataracts allele be represented by C and fragile bone by B.
A man with cataracts (CC or Cc) and normal bones (bb), whose father had normal eyes would have the genotype Ccbb. The cataract would be heterozygous because he had a normal eyes father. The affected allele must have been inherited from his mother.
A woman free from cataracts (cc) but with fragile bones (BB or Bb) whose father had normal bone would have the genotype ccBb. The fragile bone would be in heterozygous condition because she had a normal bone father. The affected allele must have been from the mother.
Ccbb x ccBb
Offspring
4 CcBb - cataract eyes, fragile bone
4 ccBb - normal eyes, fragile bone
4 Ccbb - cataract eyes, normal bone
4 ccbb - normal eyes, normal bone
a) Probability that their first child would be from both abnormalities = 4/16 or 1/4 or 25%
b) Probability that their first child would have cataracts but no fragile bones = 4/16 or 1/4 or 25%
c) Probability that their first child would have fragile bones but no cataracts = 4/16 or 1/4 or 25%
d) Probability that their first child would have both cataracts and fragile bones = 4/16 or 1/4 or 25%
PLEASE HELP ASAP (: question in photo
Answer:
A) exponential growth
Explanation:
In the Linnaean system, organisms are classified into different groups based on which of the following?
Select each correct answer:
A- similarities in genetic sequence.
B- structural similarities.
C- similarities during embryonic development.
D- similarities in habitat.
Answer:
I think the answer is (c)
Answer: A, B, C
Explanation:
Can someone do this. I will give brainlist!!
Guanine(G) pairs with Cytosine(C) through a triple hydrogen bond
Adenine(A) pairs with Thymine(T) in DNA, but in this case Uracil(U) because we have a RNA strand therefore:
1.Cytosine
2.Uracil
3.Adenine
4.Guanine
blanced diet must contain enough energy to meet the body's needs what else must it contain
Answer:
Water
Explanation:
Answer:
A balanced diet should contain many good Factors and they are -It should be very healthy it should be lightit needs to be nutritional The diet should not make the person fatIt should provide better sleep It should keep away the diseases Hope u like my answerHelp I need helpppppppoo
What are things we can learn from examining hair? Three parts of hair?
Answer: The hair is an outgrowth or appendage that grows from a hair follicle.
Explanation:
The three parts of the hair are cuticle, cortex, and medulla. The cuticle is the hard part made up of scales with keratin protein, cortex is the inner pigmented part, and the medulla is the innermost part of the hair.
During hair examination the type of cuticular scales helps in determining the organism to which it belongs, diameter of the medulla also helps in determining the organism, the DNA analysis of the hair can link to its origin, the detection of heavy metal poisoning like lead, arsenic, and others. Drug abuse details can also be determined by the hair analysis.
How was Cell Theory created?”
Answer:
The invention of the microscope led to the discovery of the cell by Hooke. While looking at cork, Hooke observed box-shaped structures, which he called “cells” as they reminded him of the cells, or rooms, in monasteries. This discovery led to the development of the cell theory.
hope this helps :)
What are chromosomes? How are they different between prokaryotes and eukaryotes?
Answer: A chromosome is a long DNA molecule with part or all of the genetic material of an organism. The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not
Explanation:
Chromosomes are long thread of DNA molecule. Prokaryotes have one chromosomes while eukaryotes have many.
Chromosome:
It is a long thread of DNA molecule as a part of genetic material of all living organisms.
In prokaryotes, DNA is not very much compacted.Only one chromosome is usually scene in prokaryotes.In Eukaryotes, Chromosome are very compacted and form an special structure.Multiple chromosomes are found in Eukaryotes.
Therefore, chromosomes are long thread of DNA molecule. Prokaryotes have one chromosomes while eukaryotes have many.
To know more about Chromosomes,
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1 point
7. In the wild, rabbits breed very quickly producing many offspring in a
short period of time. Which of the following is most likely the reason why
rabbits have adapted the ability to breed quickly? *
There are many diseases that wipe out entire rabbit populations
O They have limited habitats that they live in
There is limited food in most habitats
O They have many predators and short life spans
Answer:
they have short life spans and many predators.. hope this works
What is the definition of "earth overshoot day?"
Answer: Earth Overshoot Day is the calculated illustrative calendar date on which humanity's resource consumption for the year exceeds Earth’s capacity to regenerate those resources that year. The term "overshoot" represents the level by which human population overshoots the sustainable amount of resources on Earth.
Phil observes that when he turns on a flashlight, chemical energy from the batteries is transformed into light energy. Phil tries to think of some other ways energy is transformed. Which of the following scenarios describe an energy transformation? Choose the three scenarios that apply.
A. a lamp being turned on
B. a toaster being used to toast bread
C. chocolate melting in your hand
D. a car horn honking
Answer:
A. a lamp being turned on
B. a toaster being used to toast bread
D. a car horn honking
Explanation:
Energy transformation is the conversion of one form of energy to another form in accordance with the law of conservation of energy. According to this question, Phil is observing a flashlight, which turns chemical energy (batteries) into light energy.
From the examples given in this question, the following are examples of scenarios that involve energy transformation:
- A lamp being turned on: This converts chemical energy to light energy.
- A toaster being used to toast bread: This converts electrical energy to heat energy.
- A car horn honking: This converts electrical energy to sound energy.
Note that, melting of a chocolate does not transform any form of energy.
All energy comes from the sun. In 2-3 sentences, explain how it is transferred from one organism to another.
Answer:
When the sun rays come down into the atmosphere and the plants on the ground use photosynthesis to reproduce and eat. If an animal, for example, a bunny, eats grass the energy will be transferred to the bunny. If a fox eats the bunny, the energy transfers to the fox. the amount of energy will be reduced each time something is eaten because it keeps being consumed over and over.
Explanation:
What is the key activating signal in the TNF receptor signaling pathway that occurs downstream of TNF-alpha binding to the extracellular domain
Answer:
TNF-alpha is expressed as a homotrimer that exerts its activities through binding to two types of receptors: TNFR1 and TNFR2, which are transmembrane glycoproteins characterized by having an extracellular domain with 4 cysteine-rich domains (CRD 1-4) , each with 3 cysteinecysteine disulfide bonds.
Explanation:
TNF-alpha (Tumor Necrosis Factor), which has the characteristic of being a paracrine signaling ligand, is a pleiotropic cytokine that functions as a mediator of immune regulation, the inflammatory response and apoptosis in some cell types. Receptors in this family are involved, with some exceptions, in juxtacrine signaling; that is, both the ligand and the receptor are membrane proteins with extracellular domains through which signaling is established. The cellular responses promoted by TNF are initiated by its interaction with two different types of cell receptors, the type I receptor (55 kDa) and the type II receptor (75 kDa). Both types of receptors are part of the TNF receptor family, members of which include Fas antigen (apoptosis inducer, also called Apo-1 or CD95), CD27 (T-cell activation antigen), CD30 (lymphoma marker Hodgkin) and CD40 (B-cell antigen), which share the characteristic of cysteine-rich sequences in their extracellular domains. This family of cytokines generate cellular responses that include differentiation, proliferation, activation of NFκB and cell death, promoting the aggregation of receptor monomers, that is, they have a transmembrane domain that participates in the solubilization of the receptor and a domain of intracellular death that is involved in signal transduction. The binding of TNF to TNF-R1 induces a signaling cascade through its intracellular death domain, which subsequently leads to the activation of complex I (or inflammatory) of NFkB and proceeds to the transcription of anti-apoptotic genes, pro- inflammatory diseases and apoptosis complex II (caspases).
Two cell organelles are described below.
Organelle A: Present in plant cells but not present in animal cells
Organelle B: Much larger in size in plant cells than in animal cells
Which of the following is most likely correct?
Answer:
Organelle A is chloroplasts
Organelle B is the vacuole
Explanation:
I don’t exactly understand what it means on which one is correct, but I hope this helps you.
Lab: Natural Selection answer in the link pls 50 points and
1. How did the colors of each type of prey affect its population size over time?
2. What color rabbit seemed to camouflage the best in this snow habitat and why? What
color rabbit seemed to camouflage the best in the summer habitat and why?
Answer:
The more an animals color matches their surroundings, the more likely it is for survival. White rabbits fur matches the snow, and brown rabbits fur blend with the dirt
Explanation:
The colors that stand escape the many would be red and blue and the one's camouflage is mostly brown, green, and yellow, swinging on its place and surroundings.
What is the Color rabbit?
The prey that is more delicate in color lasts extended. As the duration goes on, the white prey lasts extended than the blue colors as they blend into their surroundings sufficiently.
The green, red, and orange varied practically extinct over the 3 generations because they could be stained easier and could not blend into their surroundings.
The colors were very necessary for how it influenced the people because the more brilliant the color the more predators it's going to seduce and the colors such as green and brown are more camouflage.
The more an animal's color approximates its surroundings, the more possible it is to survive. White rabbit's fur approximates the snow and brown rabbits' fur in combination with the dirt.
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What is the difference between a solar pillar and a sun dog?
Instincts are more complex innate behaviors. What are some examples of instinctive behaviors in animals?
Answer:
chicks in many bird species instinctively open their mouths wide when their mother returns to the nest. the mother instinctively spits up food.
Indicate the correct designation of the paired sex chromosomes.
male: XY
female: YY
Answer:
Out of the written pairs, males have XY while females have XX
Explanation:
Which organelle is the powerhouse of the cell and produces energy?
Answer:
mirtochandria
Explanation: