Answer:
Burning fossil fuels is the most common
Answer: one edge I believe it is construction
Explanation:
the other choices are all positive and would limit air pollution not contribute to it
what do you understand by the term reproductionwhat do you understand by the term reproduction
Answer:
Reproduction is the manufacturing of offspring. There are primary forms: sexual and asexual reproduction. In sexual reproduction, an organism combines the genetic statistics from each of its mother and father and is genetically unique. In asexual reproduction, one parent copies itself to shape a genetically same offspring.
Explanation:
Make sure to rewrite it in your own words, don't get caught cheating (for those who are.)
which part of the flower or needed to make seeds?
Answer:
Ovary is the part of the flower which is needed to make seeds
Which of the following sentences state a significant conclusion that Gregor Mendel drew from his experiments with pea plants? Traits are inherited in discrete units and are not the result of "blending." Genes are composed of DNA. Recessive genes occur more frequently in the F1 generation than do dominant ones. There is considerable genetic variation in garden peas.
Mendel concluded that the alternative forms of each trait are coded by discrete factors, which were called alleles that combine in pairs to express the trait. Traits are inherited in discrete units and are not the result of "blending."
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After making many crosses that involved different traits -such as plant height, or flower colors-, Mendel observed that, per trait, the F1 only expressed one of the alternative forms, while de other one disappeared.
Mendel named dominant the expressed variant.
Mendel then let these new plants auto pollinate and observed the results in the second generation, F2.
He saw that the variants that had previously disappeared among the F1, reappeared again. Both alternatives for each trait were present in the F2.
Mendel named recessive the second alternative variant.
Mendel explained his results by arguing that discrete factors were responsible for these phenotypes.
These factors should have been present in the F1 in pairs. One of them came from one parental plant, and the other factor came from the other plant. These factors separated again during sex cells formation, producing two types of gametes, each with only one factor.Mendel conclusion about his experiments was that per trait -flower color of plant length-, each plant had a pair of factors -which he named alleles-, and that each factor coded for one of the alternative forms of the traits -white or purple, tall or short-.
He thought that alleles separate -segregate- during the process of gamete formation.
The First Mendel's Law is the first conclusion he took about his experiments and is known as the segregation principle.
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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:
What type of molecule controls photosynthesis
Answer:
Chloroplasts, I believe
Explanation:
How to read a pedigree.
Answer:
Explanation:
One trick for identifying a recessive trait is that if a trait skips a generation in a pedigree, it is often an autosomal recessive trait (although a trait can be autosomal recessive and not skip generations). These traits appear with equal frequency in both sexes.
The first thanksgiving lasted
Answer:
for 3 days
Explanation:
Answer:
The first thanksgiving lasted for three days
Explanation:
What would happen if cells never changed?
Options:
1. All cells would become blood cells.
2. Meristem cells would form.
3. All cells would be exactly the same.
4. Cell differentiation occurs.
Answer: 2. Meristem cells would form.
Explanation:
Permanent cells are cells that are incapable of regeneration. These cells are considered to be terminally differentiated and non-proliferative in postnatal life. This includes neurons, heart cells, skeletal muscle cells and red blood cells.
What is a vertebrate?
a) an animal with radial symmetry
b) an animal without a backbone
c)
an animal that is asymetrical
d) an animal with a backbone
Answer:
d) an animal with a backbone
Explanation:
What organelle is a twin.
(c)
In the human body, glucose is absorbed into the blood from the small intestine.
The small intestine contains many villi.
Which two of the following help the absorption of glucose in the small intestine?
Tick () two boxes.
Villi have a cell wall.
Villi are covered in thick mucus.
Villi give the small intestine a large surface area.
Villi have many blood capillaries.
(2)
Total 7 marks)
Answer:
villi is used and is very imp as it has structure like finger type which help for increase in surface area for more absorption and less wastage of water/minerals
Answer:
villi have a cell wqll
Explanation:
5. Which of the following enclose their DNA in a nucleus?
b. bacteria
c. eukaryotes
d. viruses
A place where animals and plants are protected is called
A) an ecosystem
B) a refuge
C) a sanctuary
D) both B and C
Hello! can someone help me w this pls
2- El electron ocupa el nivel
de menor energia que se
encuentran libre falsa o verdadera
verdad
porque si estos tuvieran carga positiva ya no serían electrones
which enzyme can repair breaks to the phosphate-sugar backbone of dna?
Answer:
Helicase unwinds the DNA and creates the replication fork for other enzymes to bind.
Explanation:
I hope this helps :)
What does a plant need to create a glucose molecule in photosynthesis?
Choose all correct answers.
carbon dioxide
sunlight
water
oxygen
Answer:
carbon dioxide, water, sunlight
Prolactin (PRL) is a pituitary hormone that regulates milk production in lactating mammals.
a. True
b. False
Answer:
true
Explanation:
The main structural distinction between the left atrium and the right atrium is that the left atrium has the _____, and the right atrium does not.
a. auricle
b. pectinate muscles
c. cardiac muscles
d. chordae tendinae
Given our understanding of cardiac anatomy, we can confirm that the main structural distinction is that the right atrium has the pectinate muscles, while the left one does not.
Firstly, we must address that there is a wording issue with the question. In reality, it is the right atrium that contains the pectinate muscles. The remaining options either correspond to both atrium, or neither.
The auricle is another word for ear. This is a cavity present on both the right and left atrium which allows them to extend their blood carrying capacity in situations of need. This option cannot be correct for the question since both atria possess one.
As for options b and c, cardiac muscle is present in the entirety of the heart. Cardiac muscle is the muscular cells that make up every wall and cavity of the heart and allow it to complete its unique function. Chordae tendinae, are fibers present in the ventriculus that attach the walls to the tricuspid valve, these are not present in either of the atria.
Therefore, we can confirm that though the wording is off, the intended correct answer is pectinate muscles, given that the right atrium is characterized by their presence, whilst the left atrium contains few, if any, of these muscles.
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Answer: Auricle
Explanation: Just took the test
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
what is the main difference between a biome and an ecosystem
An ecosystem is quite smaller than a biome and exists within a biome.
A biome refers to a large habitat ocupied by assorted fauna and flora. Biomes are classified based on abiotic conditions such as temperature, soil types, rainfall etc. An ecosystem is a self supporting unit in which materials and energy are exchanged within the system.
The difference between a biome and an ecosystem is that a biome is a collection of different ecosystems that are found within a habitat while an ecosystem is composed of living and nonliving factors. An ecosystem is quite smaller than a biome and exists within a biome.
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also known as fat cells, the are predominant in the subcutaneous layer.
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:
blood flows more slowly in the capillaries than in the aorta. why?
Answer:
because it a smaller part
Explanation:
Due to the capillaries' large overall cross-sectional area, blood flow there is slow, allowing for adequate nutrition exchange.
How blood flows through blood vessels?The rate of blood flow dramatically decreases as it enters arteries, arterioles, and eventually, capillary beds, slowing to roughly 0.026 cm/sec, or 1,000 times slower than the aorta.
The capillaries, where blood flow is the slowest, provide time for the exchange of gases and nutrients. A force that opposes a fluid's flow is called resistance.
The majority of blood vessel resistance is caused by the size of the vessel. Blood flow reduces as vessel diameter shrinks due to an increase in resistance.
Therefore, the high total cross-sectional area capillaries blood flows more slowly.
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How are thorns and spines related to drought resistance?
Answer:
To survive in drought conditions, plants need to decrease transpiration to limit their water loss. Some plants that live in dry conditions have evolved to have smaller leaves and therefore fewer stomata. Extreme examples are plants with leaves that resemble spiky thorns or spines.
is this correct?.....
Answer:
yes it is :) I hope this helps:)
how long can you keep hard-boiled eggs in the refrigerator
Answer:
7 days
Explanation:
i found it out the hard way
Answer:
You can keep them up to seven days in the fridge.
Explanation:
When does osteogenesis begin?
Answer:
a. When a fetus is 13-15 weeks old
Explanation: is correct
Which animal has a digestive system most similar to a human?
1. cow
b. jellyfish
c. octopus
d. wolf
Answer:
Explanation: The cow is a ruminant animal. Ruminant animals are known for the unique way their digestive systems work.
around the mid-1850s, mendel crossed true-breeding purple-flowered pea plants with true-breeding white-flowered pea plants. the results of his research provided us with the basic principles of heredity.
Answer:
Yes and you can use a Punnett square to predict the genotype of their offspring!
Which star is more massive than our Sun,but has a lower surface temperature?
(1) 40 Eridani B (3) Aldebaran
(2) Barnard's Star (4) Sirius
Answer:
The answer is not in the option, the answer is VY Canis Majoris
