Answer:
The change in the climate would have made the birds migrate
Explanation:
How do you know that flowers have undergone fertilizer even before they turn into fruits?
Answer:
we can know for eg an apple when u buy it and scrape the skin of the apple if you wind some waxy substance from it we can say this has been done to increase the shine so customers think this is a good apple and please do was fruit and vegetables after buying them throughly.
My thoughts about genetically modified crops
What percentage of the earth’s land and what percentage of the earth’s oceans have been disturbed by human activities?
Answer:
the first 1 :)
Explanation:
What is generally the site of cellular respiration?
What are three advantages to sexual reproduction?
restricts chromosomal combinations
produces resistance to unfavorable conditions
Produces disease-free seed plants
produces more uniform individual organisms
produces genetic variations
Answer:
1. produces genetic variations.
2. produces resistance to unfavorable conditions.
3. produces disease-free seed plants.
Explanation:
Sexual reproduction causes more genetic variation. More genetic variation results in diverse immune systems and traits that are advantageous to survival. Variation is good because it allows a species to adapt to new environments.
The advantages of sexual reproduction is produces resistance to unfavorable conditions, produces genetic variations and produces disease-free seed plants.
What do you mean by sexual reproduction?Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes.
A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop.
Three mechanisms contribute to genetic variation arising from sexual reproduction: independent assortment of chromosomes, crossing over, and random fertilization.
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during replication, which enzyme unwinds the dna double helix?
DNA helicase enzyme unwinds and breaks H bonds between the 2 complementary strands using ATP to separate the 2 strands.
Which model correctly explains the meaning of 3’ and 5’ in nucleic acids?.
Answer:
5' carbon is bonded to the phosphate group and the 3' carbon is bonded to an OH group.
The 5' carbon is bonded to the phosphate group and the 3' carbon is bonded to an OH group.
Which component of DNA determines the 3 and 5 ends of the strands?As new nucleotides are added to a strand of DNA or RNA, the strand grows at its 3' end, with the 5′ phosphate of an incoming nucleotide attaching to the hydroxyl group at the 3' end of the chain.
How are nucleotides linked together 5 to 3?DNA and RNA are composed of nucleotides that are linked to one another in a chain by chemical bonds, called ester bonds.
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small substances are passively moved from the blood to the filtrate in:
Answer:
I believe it would filter in the Glomerular filtration.
Explanation:
I dont think you really need one based on the question.
darwin proposed that homologous structures are evidence of
Answer:
Homologous structures provide evidence for common ancestry
Section 3: For at least one of the sub-problems, propose two solutions based on the information from the lesson and your additional research. In the rationale column, explain how your solution restores the stability and biodiversity of your selected ecosystem.
Removal of invasive species and growing more vegetation can restore the stability and biodiversity of ecosystem.
These two solutions restores the stability and biodiversity of the selected ecosystem because invasive species can capture more resources as compared to local species which leads to the extinction of local species.
While on the other hand, growing more vegetation provides more food to the organisms which ultimately increases the biodiversity of the ecosystem so we can conclude that removal of invasive species and growing more vegetation are the solutions to bring ecosystem in a stable condition.
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at what point during meiosis do homologous chromosomes pair up?
Answer:
Prophase 1
Explanation:
In prophase 1, homologous chromosomes pair up and exchange sections of DNA in a process called crossing over.
what modern day scientist use to learn the Ordovician Period
Rocks from the Ordovician Period contain evidence that plants began colonizing dry land at this time. Most experts agree that the ancestors of land plants first evolved in a marine environment, then moved into a freshwater environment and finally onto land.
Ordovician Period, in geologic time, the second period of the Paleozoic Era. It began 485.4 million years ago, following the Cambrian Period, and ended 443.8 million years ago, when the Silurian Period began. Ordovician rocks have the distinction of occurring at the highest elevation on Earth—the top of Mount Everest.
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Distinguish between smooth endoplasmic reticulum and rough endoplasmic
reticulum (1 point)
Smooth endoplasmic reticulum has ribosomes attached to
its surface
Smooth endoplasmic reticulum has vacuoles attached to its
surface
Rough endoplasmic reticulum has ribosomes attached to its
surface
Rough endoplasmic reticulum has vacuoles attached to its
surface
The smooth endoplasmic reticulum is different from rough endoplasmic reticulum as the rough endoplasmic reticulum has ribosomes attached to its surface which are absent in smooth endoplasmic reticulum. Thus, the correct option is C.
What is Endoplasmic reticulum?
Endoplasmic reticulum (ER) is a large, dynamic structure which serves for many roles in the cell. There are two types of ER which are Smooth Endoplasmic Reticulum (SER) and Rough Endoplasmic Reticulum (RER). The diverse functions of the ER are performed by distinct domains present in the ER consisting of tubules, sheets and the nuclear envelope.
Rough endoplasmic reticulum contains ribosomes on its surface and synthesizes protein, whereas the smooth endoplasmic reticulum does not contain ribosomes and functions to make lipids and detoxify the cell. Large amounts of SER are found in the cells which participate in lipid metabolism and detoxification of the body, such as liver cells.
Therefore, the correct option is C.
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Sunlight helps our bodles to produce Vitamin D. In some areas of the United States, there is not enough sunlight during the winter mont
support this process. What is on thing you would recommend to people who live in those areas?
O A. Drink juice that is pasteurized with Vitamin D.
O B. Eat more proteins that bulld Vitamin D.
O C. Drink soymilk that is enriched with Vitamin D.
O D. Eat more carbohydrates that bulld Vitamin D.
Answer:
It would be the first one
Explanation:
A lot of juices are pasteurized with Vitamin D it can be V8, orange juice, grape juice, cranberry juice, etc.
the type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the
The sodium channel possesses an inactivation gate that temporarily closes after the channel is active.
In neurons, sodium channels are responsible for the ascending phase of the action potential (depolarization).
Characteristically, this channel has two transmembrane voltage-dependent gates.When the membrane is depolarized to the threshold, both gates are activated, but since one of them opens rapidly while the other closes slowly, the channel remains open for less than 2-5 milliseconds.Therefore, we can conclude that the sodium channel is responsible for the depolarization and possesses two gates which one temporarily closes after the channel is active.
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enzymes are specific they will only fit with certain substrates explain why lactase can digest lactose but cannot digest other sugars like maltose and sucrose
Explanation:
your small your small intestines can't absorb either lactose or maltoseyou use different enzymes to digest the two sugars lactase break down lactose why an enzyme called sucrase-isomaltase breaks down maltose because enzyme are so specific with regard to function you can't break down maltose with lactose or vice versa
Lactase breaks down only lactose in food in our body can absorb it not maltose and sucrose as enzymes are specific in nature.
what are the properties of an enzyme ?Enzymes are protein which act as a catalysts and speed up the rate of biochemical reactions with out changing the structure of the final product.
Enzymes can control the speed and specificity of the chemical reaction, and the rate of biochemical reaction often influences enzymes and they can take place at a relatively low temperature; it lower the activation energy.
The enzyme activity pH specific, that is at a particular pH, each catalyst is most active for example at PH 2 for pepsin, pH 8.5 for trypsin, for example.
Both enzymes have active sites which can activate biochemical reactions. It is soluble in water, dilute glycerol, NaCl, and dilute alcohol.
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What is the function of the nuclear envelope?
The main function of the nuclear envelope is to separate the nucleus from the cytoplasm in eukaryotic cells.
I hope this helps!
a single base deletion within the open reading frame of a gene’s dna sequence can result in ____________.
Answer:
Replacement of multiple correct amino acids with alternative acids
Explanation:
Replacement of multiple correct amino acids with alternative acids
when new species spread out and adapt to all available habitat types, it is known as what?
Answer:
This is called allopatric speciation. There are five types of speciation: allopatric, peripatric, parapatric, and sympatric and artificial.
What type of cell or structure stores food within the stem?.
If you are pushing a shopping cart and you start pushing harder what happens?
Answer:
The shopping cart will continue rolling until it will stop.
Explanation:
what are the characteristics of a visceral reflex?
Answer:
Visceral reflexes involve a glandular or non-skeletal muscular response carried out in internal organs such as the heart, blood vessels.
Explanation:
An organ can be defined as:
A - a group of cells of one type that has a function
B - a group of several different cell types, each type working together
C - a group of tissues that are located together that have unrelated functions
D - part of a system and therefore does not have a function of its own
Answer:
a group of several different cell type each type working together
Please help me with this! The question on the image
2.
No movement of water would have
occurred if they were isotonic.
3.
A. Side 2B. Side 1if you were to trace the blood flow from the heart to the obturator artery, which vessel would NOT be found along the pathway
Answer:
ur mum
Explanation:
The written way the author intended his or her story to be The way a person might understand a story or bring it to life The most popular way a story has been recorded on the screen The process of writing a story and then getting it published
Please help a girl out !
Answer:
3=??
5=B
6=C
7=J
8=E
9=G
Explanation:
❤️ sorry I don't know 3 number
4. View of space from earth keeps on changing because earth is.....?
Answer:
Earth does not always spin on an axis running through its poles. Instead, it wobbles irregularly over time, drifting toward North America throughout most of the 20th Century (green arrow). That direction has changed drastically due to changes in water mass on Earth.
Explanation:
Match the vitamin deficiencies and their symptoms.
depression
dry skin and nails
excessive bleeding
A
B6
K
Answer:
depression: B6
dry skin and nails: A
excessive bleeding: K
What does an optical part of the light microscope consist of? A. Ocular.
B. Diaphragm.
C. Condenser.
D. Turret
2. Organisms that are made up of more than one cell are called
a. viruses
b. bacteria
c. unicellular
d. multicellular
Answer:
Multicellular
Explanation:
They are composed out of more than one cell meaning it can't be unicellular. It can not be a virus or bacteria either because it is only identified as a cell made up of more than one cell, not the effects of what the cells do. Hope this helped!
Answer:
multicellular
learnt in school