7.9(A) Which of these conditions is most responsible for Earth having an environment
that supports life? help please
Answers
Related Questions
What is the function of the stigma?
A. To catch pollen grains
B. To produce eggs
C. To attract insects
Answers
Explanation:
A. to catch pollen grains
is yr correct ans.
hope it helps
stay safe healthy and happy..Answer:
A. To catch pollen grains
Explanation:
The function of the stigma is to catch the pollen grains.
Which of the following facts is the best evidence that humans and salamanders had a common ancestor?
A) Both species eat meat
B) Both species have pharyngeal arches and slits when they are embryos
C) Both species can swim
D) Both species have skin
Answers
Answer:
B
Explanation:
Look up an image of a human embryo v. a salamander embryo if you look carefully you'll see the arches and slits.
There are approximately 480 million alveoli present in human lungs. About 70% of the area of each alveolus is wrapped in
capillaries.
These factors make the alveoli a perfect location for
Answers
Answer:
oxygen diffusion occurs in the lung
Which is not true of selective breeding?
Selective breeding always produces unhealthy
offspring
Selective breeding can be used to weed out weak
genes.
Selective breeding can be used to pass on
desirable genes.
Selective breeding has been used by humans for
thousands of years.
Answers
Answer:
selective breeding always produces unhealthy offspring
Explanation:
false becasue its mostly healthy and dominant genes
The respiratory system involves the intake of carbon dioxide into the body and the release of oxygen from the body.
A. True
B. False
Answers
Answer:
The answer is false, we intake oxygen and exhale carbon dioxide
Explanation:
Answer:
Hi, there the answer false
Explanation:
Question 7 (1 point)
In which organelle does DNA replication take place?
a
lysosome
mitochondria
nucleus
ribosome
Answers
The answer should be nucleus
What are the two sensory functions of ears?
Answers
Answer:
obviously listening and hearing
Which is an example of a vestigial structure?
A) The flipper of a whale
B) The wings of a bird
C) The tailbone of a human
D) The eyes of a bat
Answers
Answer:
C) the tailbone of a human
Humans no longer have tails due to evolution because we don't need them. The other answers are body parts that are useful to those animals.
Hope this helps!
which examples represent abiotic factors affecting biotic factors? Check all that apply
Answers
Answer:
ash from a volcanic eruption kills new plant growth.
warm water from a nuclear power plant causes overgrowth of algae.
a river floods and deposits tree pollen along its banks.
Explanation:
Ecosystem consist of biotic and abiotic elements. Biotic refers to all living organisms while abiotic refers to all non-living elements of the environment. Living organisms depends on abiotic factors such as light, temperature, water and soil etc for their growth and survival. In the above answer, Ash of volcano, warm water and rivers are abiotic elements while plant, algae and pollen are biotic elements.
What is passive smoker ?
Answers
Answer:
hope it helps you
Explanation:
efarBfshdynsbzbts6y ucCuffuyndUmYN5cxhmyfz7g8U
In a population:
A. Are organisms that live all over the world
B. Are autotrophs
C. All organisms are of different species
D. All organisms are the same species
Answers
Answer:
D. All organisms are the same species
Explanation:
The organisms of the same species in a particular area is called population.
A mutation that can be inherited by offspring would result from A) random breakage of chromosomes in the nucleus of liver cells B) a DNA base substitution in gametes during meiosis C) abnormal lung cells produced by toxins in smoke D) sun exposure of skin cells
Answers
Answer:
B) a DNA base substitution in gametes during meiosis
Explanation:
When might self-fertilization be beneficial for a plant? When there are too many dioecious individuals in a population, self-fertilization becomes beneficial for a monoecious individual. When environmental conditions are harsh, such as a plant growing in nutrient-poor conditions, or when herbivores have damaged the plant, plants may self fertilize. When environmental conditions are perfect, plants can afford to self-fertilize. Only plants with perfect flowers are capable of self-fertilization.
Answers
Answer:
Only plants with perfect flowers are capable of self-fertilization.
Explanation:
Self-pollination is the process that allows plants to fertilize themselves. This process is very beneficial when a plantation has plants with few flowers or when the plants are spaced far apart.
However, only plants with perfect flowers can self-fertilize. This is because for self-fertilization to occur, the plant needs to have flowers that present the male and female reproductive organs, which allows the same flower to produce pollen that will be sent to its own ovary. Only perfect flowers have male and female reproductive organs at the same time.
1. What is facial reconstruction? Why is it used?
Answers
Answer:
Facial reconstruction is when you examine the bones of your face to figure out changes to make.
How do you calculate the number of neutrons?
A. The same as the atomic number
B. Equal to the number of protons
C. Equal to the number of elections
D. Take the mass number and subtract out the atomic number
Answers
Answer:
D
Explanation:
D is correct take the mass number and subtract it
Answer:
D. Take the mass number and subtract out the atomic number
Explanation:
We should take the mass number and subtract out the atomic number to calculate the number of neutrons.
PLEASE JUST ANSWER THE SURVEY I WILL GIVE YOU POINTS
How much time do you send on your phone (on average)?
<1 hour
1-2 hours
2-3 hours
>3 hours
Answers
Answer:
3
Explanation:
cus yues :3
Answer:
more than 3 hours daily.
Wasp stings are alkaline. Which substance would help relieve this injury?
A) Vinegar
B) Toothpaste
C) Tap water
D) Ammonia based window cleaner
Answers
Answer:
A
Explanation:
because is a good solution for injuries
The final event in the lytic cycle is that the cell bursts, releasing all the manufactured viruses.
False
True
Answers
False The final event in the lytic cycle is that the cell bursts, releasing all the manufactured viruses.
What is viruse ?A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, more than 9,000 virus species have been described in detailof the millions of types of viruses in the environment.Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity. The study of viruses is known as virology, a subspeciality of microbiology.
When infected, a host cell is often forced to rapidly produce thousands of copies of the original virus. When not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles, or virions, consisting of
(i) the genetic material, i.e., long molecules of DNA or RNA that encode the structure of the proteins by which the virus acts;
(ii) a protein coat, the capsid, which surrounds and protects the genetic material; and in some cases
(iii) an outside envelope of lipids. The shapes of these virus particles range from simple helical and icosahedral forms to more complex structures. Most virus species have virions too small to be seen with an optical microscope and are one-hundredth the size of most bacteria.
Learn more about virus
https://brainly.com/question/18451282
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1.DNA is a molecule composed of two chains in form a ____________ compose by______________, ____________ and pentose. And the structure and function of genes.
Answers
Answer:
DNA is a molecule composed of two chains in form of a DOUBLE HELIX compose by ORGANIC NITROGEN CONTAINING BASE, PHOSPHATE GROUPS and PENTOSE.
Explanation:
Nucleic acids are found in all living cells. They are composed of strands made up of repeating units called nucleotides. Each nucleotide consists of
--> a five carbon sugar( PENTOSE)
--> a phosphate group
--> an organic nitrogen containing base: adenine, guanine, cytosine or thymine.
The two types of nucleic acids include:
--> Deoxyribonucleic acid ( DNA) and
--> Ribonucleic acid ( RNA)
Deoxyribonucleic acid ( DNA) is found in chromosomes located in the nucleus of cells.
STRUCTURE OF DNA
The DNA molecule consists of two strands that curve spirally to form a double helix structure. The strands are held together by hydrogen bonds between the base side arms. Each base on one strand will only pair with a specific base on the other strand: hence guanine will only pair with cytosine and adenine with thymine.
FUNCTIONS OF DNA
It stores the organism's hereditary traits and directs the day to day metabolic activities of each cell in the organism.
What is ecological succession?
A. Change that happens over time in an ecological community
B. A way a life
C. One person giving another person power
Answers
Answer:
A. Change that happens over time in an ecological community
Explanation:
Ecological succession is the change that happens over time in an ecological community. So, option (A) is the answer.
Answer:
A. Change that happens over time in an ecological community
Explanation:
Ecological succession is the gradual process by which ecosystems change and develop over time. Nothing remains the same and habitats are constantly changing.
There are two main types of succession, primary and secondary.
Primary succession is the series of community changes which occur on an entirely new habitat which has never been colonized before. For example, a newly quarried rock face or sand dunes.
Secondary succession is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat. For example, after felling trees in a woodland, land clearance or a fire.
Alma is walking in a park. Suddenly, a wild dog charges towards her. Alma is frightened. The ____ starts to respond by increasing her heart rate and dilating her pupils. After running for a few minutes, Alma realizes that the dog has fallen far behind. At this point, her ____ starts working to relax her body slowing down her heart rate and constricting her pupils.
1.
A. parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
2.
A. Parasympathetic nervous system
B. Somatic nervous system
C. Sympathetic nervous system
Answers
A Endometriosis is a condition that occurs in some women , causing multiple cells or layers of cells to grow outside of the uterus. In some cases , these growths can actually cover the entire ovary or cause the tube leading from the ovary to the uterus to be blocked. The diagram represents the female reproductive system . structures , A and B are labeled Zoom Select structure A or B and indicate your selection . Describe specifically how the growths that are characteristic of endometriosis at the location you selected affect the ability of a female to become pregnant
Answers
Answer:
sorry bro i need points
Explanation:
sorry sorry sorry
Tobacco smoke contains carbon monoxide. What problem does this cause?
1 point
A)The carbon monoxide irritates the airways, causing bronchitis
B) The carbon monoxide combines with haemoglobin in the red cells, reducing the ability of the blood to carry oxygen
C) The carbon monoxide causes lung cancer
D) The carbon monoxide causes the blockage to the bronchi
Answers
Answer:
B
Explanation:
It directly enters the bloodstream and displaces oxygen in red blood cells.
The hard outer covering of a snail's ventral foot is called the
Answers
Answer:
the operculum.
hope this helps :-)
chlorophll absorbs what colors
Answers
Answer: Violet and orange
Explanation:
They absorb light of other wavelengths with less intensity.
What does the theory of evolution tell us about living things?
A) The environment can make them change rapidly over a short period of time. B)They create fossils when they die
C)Their environment makes them change slowly over time.
D)They can give us clues about extinct species. (science 7th grade) (100 POINTS)
Answers
Answer:
Their environment makes them change slowly over time
Explanation: I took the test and got it correct.
The agents of wethering erosion deposition and the rock cycle will slowly change the fossils over time. They may damage them or burry them deep into the layers of earth. Over time, as they age, new landforms will me made ontop of them. This is why they use the fossils to determine the age of the land. I hope this helps :)
Which of the statements regarding the nitrogen cycle is true? a. Denitrification occurs when a nitrogen containing compound is produced from nitrogen in the soil. b. Atmospheric nitrogen is absorbed through the leaves of plants. c. Nitrogen fixation is the process atmospheric nitrogen is converted into biologically usable forms. d. Animals obtain nitrogen through the process of cellular respiration
Answers
Answer: Option C
Explanation:
The nitrogen cycle can be defined as the process by which the nitrogen is being recycled. The nitrogen is transferred from the atmosphere to the plants and then from plants to animals, human beings.
Then from animals and human beings it is again transferred into the soil and then atmosphere.
The nitrogen that is found in the sol is not in the usable form by the plants, nitrogen fixing bacteria converts it into usable form.
Question 16
Which statement regarding succession is NOT true?
Succession is a sequence of changes in the species composition of an ecosystem
1 Secondary succession occurs when one community of organism replaces another
2 Succession that occurs after a volcanic explosion would be followed by primary succession
O A forest fire that destroys an ecosystem would be followed by primary succession
Answers
Answer:
adsf
Explanation:
afsd
Help meeeeee plsssss! :)
Answers
We have established an independent variable and a control group.
Which of the following is contained in a marsupial's pouch? a respiratory glands. b. digestive glands. mammary glands d. none of the above. C Please select the best answer from the choices provided Ο Α OB ОС
Answers
Answer:
Mammary glands
Explanation:
