There are three main variables: independent variable, dependent variable and controlled variables.
Anyone know????????????
Answer:
sorry, don't know the answer
What is required for natural selection to take place? (HINT: There are 3 requirements)
Answer:
Explanation:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
ORR
Struggle for existence, variation and inheritance. These are said to be the necessary and sufficient conditions for natural selection to occur.
These cells, in the blood, carry oxygen and give the blood its color.
Please fast as you can
Answer:
Red blood cells.
Explanation:
Hope this helps!
Answer: https://kidshealth.org/en/kids/blood.html
Red blood cells: Red blood cells (RBCs, also called erythrocytes; say: ih-RITH-ruh-sytes) are shaped like slightly indented, flattened disks. RBCs contain hemoglobin (say: HEE-muh-glow-bin), a protein that carries oxygen. Blood gets its bright red color when hemoglobin picks up oxygen in the lungs.
Explanation:
Name the main organ that damage in the developing embryo, if the mother consumes alcohol during pregnancy .
Answer:
Placenta
Explanation:
Any amount of alcohol can harm a developing fetus and increase the risk of miscarriage. Alcohol easily passes through the placenta, the organ that nourishes a baby during pregnancy
Need help for question 29 and 30. Please help!
Term “plant system” when referring to individual plants is sgnificant because _____ ?
a plant represents a species
thinking of a single plant as a plant system reminds us of the complexity of plant life
some plants fit into greater ecologies
commercial growers have developed large systems of plants that can be grown together
Answer:
Thinking of a single plant as a plant system reminds us of the complexity of plant life
Explanation:
A plant system is a plant and all of its parts. This lets us know that there is an entire system within each plant, allowing it to carry out functions and live. We often take for granted the complexity of lifeforms, especially plants.
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Why does the cells have to divide
Answer:
Cell division also enables sexually reproducing organisms to develop from a single cell, the fertilized egg or zygote Cell division involves in repairing of cells e.g. bone marrow makes the new blood cells. It is important because it distributes the identical genetical material to daughter cell.
Explanation:
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Is oxygen a compound or an atom?
Is carbon a compound or an atom?
Is oxygen a compound or an atom?
Are nitrogen bases compounds or atoms?
Is an ATP a compound or an atom?
How can organisms make different protein molecules for a particular feature?
DNA and RNA are made of what monomers? ___________________________
42. What are the 3 components of a nucleotide? ________________________________________
43. What are the elements found in nucleic acids?___________________________________
44. What are the 3 polymers for nucleic acids.________________________________________
45. What are the 2 main functions for nucleic acids.________________________________________________________________________
Answer:
42. Nucleotides are composed of three subunit molecules: a nucleobase, a five-carbon sugar (ribose or deoxyribose), and a phosphate group consisting of one to three phosphates. The four nucleobases in DNA are guanine, adenine, cytosine and thymine; in RNA, uracil is used in place of thymine
Explanation:
43.Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P). Nucleic acids are very large macromolecules composed of repetitive units of the same building blocks, nucleotides, similar to a pearl necklace made of many pearls.
44.polymer of nucleic acid
33 terms. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Threose nucleic acid (TNA) is an artificial genetic polymer in which the natural five-carbon ribose sugar found in RNA has been replaced by an unnatural four-carbon threose sugar.
differenitate between the terms genome and epignome
Answer: The term epigenome is derived from the Greek word epi, meaning above the genome. The epigenome consists of chemical compounds that modify or mark the genome in a way that alters the instructions given by the DNA.
Explanation: Its the differnce from saying things
help me give this answer bord near
12)Give reasons:
a)mining leads to pollution
b)fossils fuel on burning create air pollution.
c)dams do not always have positive effects
Answer:
too hard.................:............
Which Best describes how water moves during osmosis? From low salute concentration to high salute concentration
Complete question: Which Best describes how water moves during osmosis?
A. From passive transport regions to active transport regions
B. From active transport regions to passive transport regions
C. From high solute concentration to low solute concentration
D. From low solute concentration to high solute concentration
Answer:
The correct option is D(From low solute concentration to high solute concentration)
Explanation:
Osmosis can be defined as the thermal movement of water molecules through a selectively permeable or semi-permeable membrane.
A selectively (differentially) permeable membrane will only allow certain molecules to pass through it. Water molecules can pass through a selectively permeable membrane easily but solutes(for example, sugar molecules) cannot.
Using sugar solution to explain further, the following occurs when equal volume of a weak( low solute concentration) and a strong sugar solution( high solute concentration) are separated by a selectively permeable membrane. A diffusion gradient exists between the water molecules in the two solutions. As a result, water molecules move from the low solute concentration to high solute concentration through the membrane. This water movement continues untill there is equal concentration of sugar on the both sides of the membrane.
During metaphase II, do homologous chromosomes pair up as in metaphase I?
Answer:
No
Explanation:
They pair up in metaphase 1 not 2
four factores to an increase in human population growth
Answer:
Population growth is based on four fundamental factors: birth rate, death rate, immigration, and emigration.
Explanation:
hopes this help ;)brainlest?
which three of the following are examples of adaptions for an animal that lives in a snowbound region?
Answer:
1. thick fur/coat
2. thick layer of fats
What is the difference between an objects structure and its function
HELP
Answer: The objects structure is like the base,the function is what its used for : >
An offspring cannot have a trait if neither of its parents have it. Do you agree or disagree with this statement now? What evidence supports your ideas about the statement?
No
An offspring can have traits that neither parents have. People have both dominant and recessive genes that control the traits that they have. So the child would have gotten two recessive genes that the parents carry, to display a trait that the parents don’t display.
It can be carried to you when the chromosomes combine even if the parents don't possess the same trait. It can skip and be dominant for you, so you would be able to see it in your genetic make up.
No, I don't agree with this statement.
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Explain why I needed a bone marrow transplant to treat her leukemia and explain why doctors used cord blood as the source of blood stem cells for her bone marrow transplant
Answer:
Leukemia occurs in the bone marrow.
Explanation:
A bone marrow transplant is needed to treat her leukemia because leukemia occurs in the bone marrow. Leukemia is a type of blood cancers that usually begin in the bone marrow and result in high numbers of abnormal blood cells which only be treated when the infected bone marrow is replaced with healthy bone marrow. Doctors used cord blood as the source of blood stem cells for bone marrow transplant because cord blood has stem cells which has the ability to treat leukemia.
Which function of the integumentary system is illustrated in the release of sweat? A. Absorption B. Protection C. Sensory Reception D. Regulation E. Secretion F. Both regulation and secretion
Answer:
F. Both regulation and secretion
Explanation:
Through sweat glands and superficial blood vessels, the skin is able to cool the body and regulate its internal temperature.
The eccrine sweat gland, which is controlled by the sympathetic nervous system, regulates body temperature. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation.
The spectrum of a distant star contains sodium lines that are offset from their normal position, as shown. What is the most likely explanation?
Sodium spectra
A. The star is relatively hot.
B. The star is relatively cool.
C. The star is moving rapidly toward us.
D. The star is moving rapidly away from us.
Answer:
Explanation:
C
What is a genetically modified animal?
Answer:
pigs,chickens,goats,sheep,dog,cat
Explanation:
animals that produce drugs,enhancing yields and increasing resistance to disease
Calculate the population of 217 bison at the end of 2 years if it decreases at a rate of 7.5% per year. _____ bison
7.5% of 217 = 16.275
At end of 1 year bisons = 217 - 16.275 = 200.725
7.5% of 200.725 = 15.054375
At end of 2 years bisons = 200.725 - 15.054375 = 185.670625 (Rounding that to the tens)
=186
can someone help pls
Answeram está en ingles
Explanation:
Every organism has a ______ number of chromosomes.
Answer:
46
Explanation:
is the answer of this quastion
Design a bark-feeding mammal that burrows its way from tree to tree.
What adaptions would you give it to protect it from predators ?
Answer:
Sharp teeth and sharp claws so it can shred away the bark, and help for attacks
Good hearing and ears to be aware of noise in their surroundings
Why is sugar considered a compound?
Answer:
It is a compound because it has 2 or more element joined together. In this case it is hydrogen/oxygen and carbon.
Explanation:
EMERGENCY!!! Im confused on how to use this chart to explain. Can someone explain it to me!!!! FOR BIOLOGY
Explain how an biotic factor (stronger storms, warmer oceans, or lower ocean pH) can affect populations in a coral reef ecosystem
Not only is the biota important, but the abiotic factors in the ocean are also important because both groups work together. The abiotic factors in the ocean help the ocean to 'work'. For example, phytoplankton (autotrophs) need light, nutrients, CO2 (dissolved gases) to photosynthesize.
Answer:
Biotic factors include plants, animals, and microbes; important abiotic factors include the amount of sunlight in the ecosystem, the amount of oxygen and nutrients dissolved in the water, proximity to land, depth, and temperature. Sunlight is one the most important abiotic factors for marine ecosystems.
Explanation:
7. What is a benefit of selective breeding in agriculture?
A. Selective breeding can create new types of plants that are more desirable for food.
B. Selective breeding can alter plants on which other animals depend for food.
C. Selective breeding reduces the variety of plants available for food.
D. Selective breeding removes all forms of disease from plants used for food.
Answer:
im my opinion... the answer is A