Answer:
1.
Explanation:
because the DNA is being mixed up while crossing over
Crossing over occurs during meiosis and leads to chromosomes containing DNA from two different parental chromosomes, hence option 1 is correct.
What is meiosis?New allelic combinations are created in the daughter cells as a result of the exchange of genetic material between non-sister chromatids of homologous chromosomes during meiosis.
Homologous chromosomes couple along their lengths during meiosis, one from each parent. At locations known as chiasma, the chromosomes overlap.
The chromosomes split and reunite at each chiasma, exchanging part of their genes in the process. Genetic diversity comes from this recombination.
Therefore, the genetic complement in each daughter cell at the end of meiosis is best described as a haploid set of chromosomes resulting from chromosomal recombination between the parents.
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Can you help? Please :)
Answer:
Number 2
Explanation:
It only makes since because of the energy that was provided
What materials are needed for photosynthesis to occur?
Answer:
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight
Explanation:
I hope this helps :)
What role did the detergent play when added to the strawberry solution?
Answer:
when added the salt and detergent mixture to the smashed strawberries, the detergent helped lyse (pop open) the strawberry cells, releasing the DNA strands could gather and clump,making it easier for you to see them.
characteristics of a respiratory system
Answer:
they allow you to breathe, they exchange gases in bloodstream and body tissues, and they allow you to smell.
Answer:
Movement of an oxygen-containing medium so it contacts a moist membrane overlying blood vessels.
Diffusion of oxygen from the medium into the blood.
Transport of oxygen to the tissues and cells of the body.
Diffusion of oxygen from the blood into cells.
Reflecting telescopes use mirrors as well as lenses.
Please select the best answer from the choices provided
T
F
Answer: true
Explanation:
Which part of the digestive system does earthworm not have?
Answer:
stomach
Explanation:
Digestion occurs mostly in the intestine and the digested food is absorbed by villi. Then pass into blood stream through capillaries. Undigested food and the soil are released out in the form of casting through anus.
Which diagram most correctly represents the process of mitosis?
Answer:
B
Explanation:
Division of 2 identity.
PLEASE HELP BEING TIMED Which is one piece of information that fossils in samples from Earth's crust reveal about Earth's history?
A. Changes in climate
B. Number if species at the specific time
C. Composition of Earth's core
D. Age of organisms when they died
Answer: changes in climate
Change in climate information that fossils in samples from Earth's crust reveal about Earth's history. So, the correct option is (A).
What are Fossils?A fossil is defined as the preserved remains, impression, or trace of a once-living thing from a past geological age, including bones, shells, exoskeletons, fossilized traces of animals or microbes, amber, hair, petrified wood, and DNA. The totality of fossils is known as the fossil record.
There are five types of fossils which are as follows:
Body FossilsMolecular FossilsTrace FossilsCarbon FossilsPseudo fossilsThe fossil record shows that the types of living things on Earth changed over time which reveals the Earth's history.
Thus, change in climate information that fossils in samples from Earth's crust reveal about Earth's history. So, the correct option is (A).
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How may mRNA be modified before it leaves the nucleus?
Answer:
The pre-mRNA molecules undergo three main modifications. These modifications are 5' capping 3' polyadenylation and RNA splicing which occur in the nucleus before RNA is translated.
Explanation:
mRNA compares to the hereditary succession of quality, and is perused by a ribosome during the time spent combining a protein.
How mRNA can be modified?it should go through extra handling before it leaves the core. This might incorporate joining, altering, and polyadenylation. These cycles adjust the mRNA in different ways. Such alterations permit a solitary quality to be utilized to make more than one protein. Exons are segments of mRNA which become "communicated" or converted into a protein. They are the coding bits of a mRNA atom.
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what is the function of photosystems
Answer:
Photosystems are the functional units for photosynthesis, defined by a particular pigment organization and association patterns, whose work is the absorption and transfer of light energy, which implies transfer of electrons. Physically, photosystems are found in the thylakoid membranes.
Explanation:
The main functions of a photosystem are: they are a functional unit of photosynthesis, and they trap or release light.
What is a photosystem?Plants, algae, and cyanobacteria all have thylakoid membranes that contain photosystems. These membranes are found in the cytoplasmic membrane of photosynthetic bacteria as well as the chloroplasts of plants, algae, and other vascular organisms. The PSI and PSII subtypes of photosystems exist.
The functional components of photosynthesis are called photosystem, and they are identified by specific pigment organization and association patterns.
Therefore, the photosystem is responsible for absorbing and transferring light energy, which entails transferring electrons. The thylakoid membranes contain photosystem in terms of physical location.
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Which elements make up the the following compounds?
1. Salt
2. Baking Soda
3. Water
4. Hydrogen Peroxide
Answer:
The element of salt is sodium. The elements of baking soda also called sodium bicarbonate are carbon,sodium,hydrogen and oxygen. The element of water is hydrogen and oxygen. The elements of hydrogen peroxide are hydrogen and oxygen same as water. Hope this helped!!
Explanation:
I am an A+ student in chemistry. So i know its right ;)
Glycerol + ___Fatty Acid Molecules Fat + ___Water Molecules 15. Fill in the missing labels indicating the number of fatty acid molecules and water molecules needed to complete the above equation.
Answer:
Test
Explanation:
TEst
How are the carbon and oxygen cycles interconnected?
A. The carbon dioxide produced during photosynthesis is used during respiration to produce oxygen.
B. The carbon on the surface of the Earth combines with oxygen in the air to form the water in the ocean.
C. The oxygen produced during photosynthesis is used during respiration to produce carbon dioxide.
D. The oxygen produced during photosynthesis becomes a component of water in the atmosphere.
Answer:
A.
Explanation:
Because carbon dioxide produce energy and releases oxygen
The oxygen and carbon cycles are interconnected as both produced or recycled by the living organisms as option C. The oxygen produced during photosynthesis is used during respiration to produce carbon dioxide.
Oxygen and carbon are moves between the atmosphere, biosphere, and lithosphere but the most important part is movement between the biosphere and atmosphere:
In the biosphere, carbon dioxide is used as a reactant to produce oxygen that moves to the atmosphere by the process called photosynthesis in plants.During cellular respiration atmospheric oxygen is used by the living organism to produce energy and releases carbon dioxide as a byproduct.On the basis of the given explanation, the correct answer would be - Option C.
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PLS ANSSWER
A group of plant eating animals moves far away from their original population. In the new environment, the only edible vegetation grows at the top of tall trees. In order to survive, the animals need a new adaptation. Which of the following variations would be the most useful new adaptation to members of the group?
A) Wider, flatter teeth that can chew and grind plant material.
B) A longer neck to reach the vegetation that is high up in the trees.
C) A better digestive system for breaking down plant material.
D) Larger ears and eyes located on sides of head to detect predators.
Answer:
B
Explanation:
The others would not help because the animals could not reach the vegetation.
What do you call a process in which cells and organisms produce other cells and organisms of the same kind
A. reproduction
B. oxidation
C. respiration
D. perspiration
Answer:
A. reproduction
Explanation:
X- it's not oxidation because oxidation is just a reaction in which atoms of an element lose electrons
X- it's not respiration because it's literally just taking a breath; breathing
X- it's not perspiration because perspiration is just sweating
✔- reproduction is making copies of the same kind.
¹ex.
fish + fish = another fish with both genetics from mom and dad, looking like a copy of them
Studying____
we infer how Pangea split into continents
Answer:
Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle.
Explanation:
Answer: Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle.
Explanation: Scientists believe that Pangea broke apart for the same reason that the plates are moving today. The movement is caused by the convection currents that roll over in the upper zone of the mantle. About 200 million years ago Pangaea broke into two new continents Laurasia and Gondwanaland.
11. Which of these are objects that circle stars other than Earth's sun? Choose the correct answer.
Debelas
exoplanets
planetesima
nebulas
Answer:
Exoplanets
Explanation:
Exoplanets (also known as extrasolar planet) are other planets outside the solar system. Exoplanets are of different categories, some of them orbit around other stars while some called rogue planets orbit the galactic center.
There are more than 4000 exoplanets which have been discovered, these planets have been discovered using the process of Transit photometry and Doppler spectroscopy.
Delia is teaching her sister about important molecules in the body.
She tells her sister that one molecule provides a set of instructions that determines traits, such as eyecolor or hair color. Which molecule is Delia describing?
Pls help !!
Answer:
answer is A
Explanation:
Which is an important difference between plant and animal cells?
A A plant cell has a cell membrane, but an animal cell does not.
BB. An animal cell has a cell membrane, but a plant cell does not.
C. A plant cell has a cell wall, but an animal cell does not.
D. An animal cell has a cell wall, but a plant cell does not
Answer: Major structural differences between a plant and an animal cell include: Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not.
HOPE THIS HELPS
which of the following is not true about plants?
Answer:
What are the options
Explanation:
The __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ carries low oxygen blood to the lungs and brings high oxygen blood back to the heart.
Answer:
Pulmonary blood vessel
Explanation:
The pulmonary blood vessel carries low oxygen blood to the lungs and brings high oxygen blood back to the heart.
More specifically, the pulmonary artery carries low-oxygen blood to the lung from the right ventricle of the heart. The blood becomes oxygenated in the lung and the oxygen-rich blood is taken back to the left atrium of the heart by the pulmonary vein.
4. Which human activity would (NOT) be classified as one that can harm
water source?*
O A. water pollution
B. waste of water resources
C. using sustainable ways to grow crops
pls help!!
Which row shows the chambers of the heart, from those with the thickest walls to those with the
thinnest walls?
from top to bottom it goes from the thickest to thinnest
A.
atria
left ventricle
right ventricle
B
atria
right ventricle
left ventricle
с
left ventricle
right ventricle
atria
D
right ventricle
left ventricle
atria
3. Burning fossil fuels results in which of the following?
O A. deforestation
O B. global climate change
O c. pollution of water
Answer:
C . pollution of water
Explanation:
What does a number in front of a molecular formula stand for?
Answer:
The small number behind each element symbol designates the number of atoms of each element in a chemical formula. If there is no number, it is assumed there is only one of those elements. A large number in front of a compound designates how many units there are of that compound.
what are the 10 branches of biology?
Answer:
Biology is a branch of science that deals with living organisms and their vital processes. Biology encompasses diverse fields, including botany, conservation, ecology, evolution, genetics, marine biology, medicine, microbiology, molecular biology, physiology, and zoology.
Chloroplasts and Mitochondria are two organelles that are largely
responsible for the cycling of carbon through the ecosystems. What are
their functions?
bacteria are both evil and friend to us
if it's infects us it will be good or evil
what is the funtion of tRNA?
-to code for protein synthesis
-to carry the synthesized genetic information from the nucleus to the ribosomes
-to synthesize protines from RNA
-to bring amino acids to the ribosomes to be assembled into proteins
Answer:
To bring amino acids to the ribosomes to be assembled into proteins
Explanation:
Transfer RNA or tRNA is a ribonucleoprotein which serves the purpose of chaperoning amino acids from the cytoplasm of the cell to the site of protein synthesis.
Answer:
D. to bring amino acids to the ribosomes to be assembled into proteins
Explanation:
what animals eat leafy sea dragons? also want to do leafy sea dragons eat?