Originally, only animals that were useful to humans were
domesticated.
O True
False
match the different parts of leaf to its description.
Just in case you can't read the picture well I wrote out what it says. Here are the boxes.
1.Leaf blade
2.Cutin
3.Xylem and phloem
4.Petiole
Here are the answers for those!
A.Part by which the leaf is attached to the plant.
B.Flattened part on the leaf
C.Upper cover consisting of a waxy layer
D.Conducting tissues
Leaf Blade - Flattened part of the leaf
Cutin - Upper cover consisting of a waxy layer
Xylem and Phloem - Conducting tissues
Petiole - Part by which the leaf is attached to the plant
PLEASE HELP!!!
Which of the following cell types of the innate immune system does not perform phagocytosis? And Why?
Neutrophils, Basophils, Macrophages, Eosinophils
Answer:
Macrophage
Explanation:
Monocytes move from the systemic circulatory system into general connective tissues, where they differentiate into what phagocytic cell type?
I think...
Basophils are cells of the innate immune system that does not perform phagocytosis. These cells (basophils) release granules of enzymes to fight against harmful microorganisms and recruit other inflammatory cells.
When harmful microorganisms (e.g., bacteria) or potentially harmful particles enter the body, different cells of the immune system respond by trying to isolate and destroy them.
Phagocytosis refers to the biological by which phagocytic cells ingest/engulf other cells (e.g., bacteria) or harmful particles.
Phagocytic cells of the immune system include neutrophils, macrophages, and dendritic cells.
Basophils are white blood cells that are responsible for releasing granules of enzymes to fight against harmful microorganisms (e.g. bacteria) and recruit other inflammatory cells (e.g., macrophages, eosinophils) to the site of infection.
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Name and describe the six main parts to the amniotic egg
Answer:
Amniotic egg
Explanation:
A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land.
7. What are the three parts of Chargaff's Rule?
plz help!!
Answer:
Chargaff rule: The rule that in DNA there is always equality in quantity between the bases A and T and between the bases G and C. (A is adenine, T is thymine, G is guanine, and C is cytosine.)
Explanation:
(30 points!)
What is the relationship among DNA, a gene, and a chromosome?
A chromosome contains hundreds of genes, which are composed of DNA.
A chromosome contains hundreds of genes, which are composed of protein.
A gene contains hundreds of chromosomes, which are composed of protein.
A gene is composed of DNA, but it has no relationship to a chromosome.
A gene contains hundreds of chromosomes, which are composed of DNA.
Answer:
A chromosome contains hundreds of genes, which are composed of DNA.
Explanation:
A chromosome contains hundreds of genes, which are composed of DNA because chromosomes are structures in the cell that contains long strand of genes and the genes are composed of DNA which are located in the cell nucleus.
The genes on chromosomes are arranged in sequence and these have different location within the cell.
Answer:
c
Explanation:
edge
Could someone help me with this all I need is the top question done.
What else erupts besides lava?? PLEASE SOMEONE HELP ME ASAP
Answer:
Smoke would make sense but I cant be sure. Is it a multiple choice question?
(also it could be water from a geyser)
What is base pairing? (and Chargaff's rule)?
Answer:
A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G).
Explanation:
Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio of pyrimidine and purine bases and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine. This pattern is found in both strands of the DNA.
please help :( (Energy Pyramid)
Answer:
Energy go brrrrrrrr
Explanation: If the producers (the grass) starts out with 10,000 units of energy then we can just subtract a 0 each time. So when the rabbit consumes the grass now theres only 1000 units of energy. When the snake eats the rabbit theres only 100 units. So the answer is 100 units
The children in a middle school classroom are all exposed to chicken pox one week. Among these students are John, who had chicken pox when he was much younger, and Sara, who has never had chicken pox. Which student do you expect would be less likely to become ill with chicken pox following this exposure and why? (5 points) John: he has naturally acquired active immunity to chicken pox from his previous exposure. Sara: she has naturally acquired passive immunity to chicken pox from exposure to other students. John: the pathogens that cause chicken pox will no longer be able to enter his body. Sara: since she has not suffered from chicken pox, her immune system is probably stronger than Johns.
Answer:
John: he has naturally acquired active immunity to chicken pox from previous exposure.
Explanation:
Your body naturally has some immunity to things that aren't you, but when you get sick with a specific pathogen, your body begins to make antibodies that specifically recognize that pathogen. Each antibody only recognizes one pathogen, and it floats around waiting to find it again so it can tell your body to kill it before you get sick again. This is why we become immune to chicken pox; after the first time you beat it, your body has the labeled antibodies and it can quickly destroy the pathogen before you get sick again.
Answer:
John: he has naturally acquired active immunity to chicken pox from his previous exposure.
Explanation:
Ok, I know this is incredibly late and doesn't matter anymore, but I just wanna say that the person before me was correct. I just took the test and this was the correct answer.
If a person has a dominant gene and a recessive gene for a certain trait, which will be expressed?
Answer:
The dominant gene.
Explanation:
Genes are passed down from parents to offspring. Tor F
Answer:
True
Explanation:
Organisms that grow on or in other organisms are called
a. hosts
b. parasites
c. autotrophs
d. spicules
parasites
explanation: theyre parasites
Answer:
B.
Explanation:
Which organism is considered an exception to the cell theory because it has a noncellular structure?
Answer:
Which organism is considered an exception to the cell theory because it has a noncellular structure? 33. Viruses are exceptions to the cell theory, but they have some characteristics of living things.Explanation:
PLEASE HELP I'M BEGGING!!!!!!!!!! Uranium-235 is a popular choice of fuel for nuclear reactors. But U-235 doesn't always fission the same way. Below are three ways it can split. Complete the nuclear equations so they balance..... fill in the blank line(s)
Answer:
its B but the numbers you need to fill in are 92 (top) and 36 (bottom) and Kr
Explanation:
(92)U[235] + (0)n[1] -----> (56)Ba[141] + (36)Kr[92] +3{ (0)n[1] } + energy
() is atomic no. and [] is atomic mass.
Classify each resource as renewable or nonrenewable.
Coal:
Geothermal energy:
Wind:
Natural gas:
Answer:
Coal:
✔ nonrenewable
Geothermal energy:
✔ renewable
Wind:
✔ renewable
Natural gas:
✔ nonrenewable
Explanation:
The classification of resources as renewable or nonrenewable is given.
Coal: nonrenewableGeothermal energy: renewableWind: renewableNatural gas: nonrenewableWhat are renewable and non-renewable resources?Energy sources that are renewable are those that can be utilized repeatedly and replenish themselves quickly. It is widely understood to refer to the kind of renewable energy sources.
Renewable energy sources can take the place of conventional energy sources that emit toxic gases and are both expensive and destructive.
Non-renewable resources are ones that can only be used once before having to be produced again over an extended period of time.
Burning fossil fuels harms our environment, and non-renewable energy sources are likewise bad for the environment.
Therefore, the correct option is
Coal: nonrenewableGeothermal energy: renewableWind: renewableNatural gas: nonrenewableTo learn more about non-renewable resources, refer to the link:
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#SPJ2
I also need help on this
Over the last 200 years, scientists have increased their knowledge of how to use chemicals to create medicines. What is one result of this trend?
Humans now have a longer life expectancy.
Humans are no longer at risk of serious diseases.
Medicines that use chemicals no longer have side effects.
Medicines that use chemicals are now less powerful. GIVING BRAINLIEST
Answer:
A. Humans have a longer life expectancy
Explanation:
Took the quiz
Why is meiosis/sexual reproduction important to the survival of a species?
Its important because they produce offspring. Without any offspring the species would slowly die off and become extinct.
Each form of a gene is called an allele. Two kinds of alleles for human blood include "A" and "O". The allele for type A blood is dominant to the type O allele. The allele for type O blood is recessive. Which of the following explanations best describes which blood type a person will have if he inherits one allele for type A from his mother and one allele for type O from his father?
Answer:
He will have Ao.
Explanation:
He will have a heterozygous blood type.
can I please get with it
Answer:
Plantets/Stars, Solar System, Galaxy, Universe
Explanation:
Answer:
Planet stars
solar system
Galaxy
Universe
Explanation:
What is the conclusion that Morgan concluded from his
experiment using the fruit flies?
Answer:
What is the conclusion that Morgan concluded from his
experiment using the fruit flies?
The process by which organisms keep everything inside their bodies within certain limits is called
Group of answer choices
Answer:
is metabolism the correct answer?
Explanation:
homeostasis
homeostasis
According to the food web shown, the bald eagle would be considered what type of consumer?
Answer:
bald eagle are usually a predator
Explanation:
Answer: c
Explanation: i took the test and got a one hundo
Please help:-) :-) :-) :-) :-) :-) :-)
Which of the following is an example of selective permeability?
a magnet
a window screen
a milk jug
a bottle rocket
A window screen is an example of selective permeability.
• Selective permeability is a characteristic and function of the cell membrane, which plays an important role in sustaining homeostasis by monitoring the passage of certain substances while inhibiting others from invading the cell.
• Of the given options, a window screen is an example of selective permeability.
• A window screen is also known as the bug screen, insect screen, wire mesh, or fly screen is created to cover the window opening.
• It is generally a mesh formed of fiberglass, metal, pieces of plastics, plastic wire, and pieces of metal or wood.
• It functions to prevent the entry of bugs, birds, debris, and other animals into the building, however, it does not prevent the entry of fresh air.
Thus, a window screen is an example of selective permeability.
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If the producers in a food web were removed, which of the following changes would
most likely occur? (SB5b)
A. The populations of the remaining organisms in the food web would increase.
B. The entire food web would collapse over time.
C. The food web would depend on the decomposers for energy.
D. The consumers would begin making energy for the food web.
Answer:
B
Explanation:
20.
Which of the following is a function of a carbohydrate?
A.
Forms the plant cell wall
B.
Insulation
C
Gene expression
D.
Regulates enzymes
Answer:
The correct answer is A.) Forms the plant cell wall.
Answer:
answer is A :) hope this helps
Light reactions occurs in which part of the chroplast