How does the structure of phylogeny charts explain homologous structures in organisms?
New species branch off ancestral species, so two species can have similarities in body structure.
All old species die off as soon as new species emerge, which explains why current species have traits of extinct species.
In different lineages of organisms, two organisms may have similar structures that evolved in different ways.
All organisms mutate their genome automatically when an environment changes, creating new traits and structures.
The structure of phylogeny charts explain homologous structures in organisms by all organisms mutate their genome automatically when an environment changes, creating new traits and structures.
What is phylogeny charts?The chart that tells about evolutionary relationship with organism or species.
The Phylogeny charts used by scientist to show the evolutionary path and connection among organisms.
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which of the following cells would not have a well-defined nucleus but would have a thick cell wall and ribosomes?
A) onion cell
B) E. Coli bacteria
C) human brain cell
Answer:
A.
onion cell
Explanation:
explain importance of osmosis in the production of urine in the kidney nephron
Which does NOT represent one of Koch’s postulates?
A. isolate germs from an infected animal
B. grow germs in a lab culture
C. inject germs into a healthy animal
D. watch to determine how long it takes for the healthy animal to become ill
A macromolecul that contains carbon,hydrogen,oxygen,nitrogen which is used by the body for growth and repair
Answer:
Protein.
Explanation:
Biomolecules may be defined as the organic molecules that are present in the living organisms. Four important types of biomolecule are carbohydrates, proteins, lipids and nucleic acids.
Proteins are the polymers of the amino acids. The proteins monomer consists of hydrogen, carbon, oxygen and nitrogen. Proteins are important for the living organisms all enzymes, antibodies and clotting factors are made up of proteins. The proteins are important for the repair and the growth of the body.
Thus, the answer is proteins.
Which of the following is NOT true of greenhouse gases?
a.
They absorb Earth’s radiation.
b.
They are produced solely by human activities.
c.
They are transparent to incoming solar radiation.
d.
They include carbon dioxide and water vapor.
Some greenhouse gases are created by natural processes as well. Methane gas is an illustration of this, and it is created by farming and cattle. Thus, option B is correct.
What is the effect of greenhouse gases in ecosystem?The consequences of greenhouse gas on the environment and human health are extensive. They aid in the smog and air pollution-related respiratory sicknesses and climate alteration by trapping heat.
Other consequences of climate change attracted on by greenhouse gases consider extreme weather, interruptions in the food activity, and a modification in wildfires.
By confining heat, they contribute to climate happening and respiratory illnesses brought on by smog and air impureness.
Other effects of climate modification pulled on by greenhouse gases consider extreme weather, interruptions in the food supply, and a modification in wildfires.
Therefore, They are produced solely by human activities.
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What occurs when a muscle becomes weaker and smaller from not being used?
Answer
gets stronger
atrophy
weight gain
turns to fat
...?
In which stage do vertebrate embryos or offspring show the most similarities?
A. Earliest stages
B. Middle stages
C. Just before birth
D. After birth
Answer:
Option B. Middle stages
Explanation:
During early stages of development, all the embryos are quite similar to each other. Embryos of different organism such as human being, fish etc. share common look alike at certain developmental stages because they all have originated from a common ancestor
However, the maximum similarity arises in the middle of embryonic development stage particularly known as phylotypic stage
Hence, option B is correct
Answer:
middle stages
Mr. Goldsmith suggested that animals must capture energy from their environment. An example of this would be _____.
a rabbit eating grass
a lion running
mice sleeping
a flying squirrel landing on a branch
The correct answer is (a) A rabbit eating grass.
The green plants that make food by the process of photosynthesis is the ultimate source of energy. When the rabbit is eating grass, it will derive energy from it. Green plants is the main source of energy for herbivores animals. Any function of the body such as sleeping, jumping, running requires energy and it is obtained from the food that an organism eats.
Which of the following is an organic molecule?
A. Fructose
B. Nitrogen gas
C. Hydrogen sulfide
D. Water
Answer:
A
Explanation:
Some fruit flies are born with curly wings which makes them unable to fly. It has been shown that curly words are caused by a dominant gene which can be represented by the symbol W, while the recessive normal wing gene is represented by the symbol w. If a parent fly with the genotype WW is crossed with a parent of the genotype Ww, what percentage the offspring will have curly wings?
Answer:
The correct answer would be 100%.
The genotype of a parent is WW. Thus it will produce only one type of gamete that is, W.
The genotype of other parent is Ww and thus two types of gametes would be produced W and w.
The cross will result in the production of offspring with two types of genotypes WW and Ww.
Hence, all the fruit flies produced from this cross will have curly wings.
Populations of predators increase when populations of prey are high because
A Y-linked disease is a sex-linked disorder found on the Y chromosomes. Who can be afflicted with a Y-linked disease?
a. a female offspring if her father has it
b. a female offspring if her mother has it
c. a male offspring if his mother has it
d. a male offspring if his father has it ...?
the answer is letter D or the last one
How was CMB radiation first discovered?
The identification of the Cosmic Microwave Background (CMB) radiation represents a crucial turning point in our comprehension of the cosmos. Here is a brief of how it was initially found:
1. Theoretical hypothesis: George Gamow, Ralph Alpher, and Robert Herman postulated in the 1940s that the Big Bang, the phenomenon that created the universe, would have left behind a weak radiation that penetrates all the space. Around 380,000 years after the Big Bang, when the cosmos first became transparent, this radiation would have been produced.
2. Proof of the hypothesis: Using a large horn-shaped antenna, Arno Penzias and Robert Wilson carried out radio astronomy experiments in the 1960s. They heard a constant background noise that appeared to be coming from all sides.
Therefore, CMB was discovered by Wilson and Penzias which to confirm Big Bang Theory.
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According to the fossil record, five ________________ took place, which lowered the variety of species found on Earth today.
Answer:
Mass Extinctions
Explanation:
The largest pod is a type i. (
a. true (
b. false
Which scientist formed his ideas about living things by performing observations with out using a microscope? A.Hooke B.malpighi C.van leeuwenhoek D.vesalius
The correct answer is D. Vesalius
Explanation:
Andreas Vesalius was a Flemish scientist and anatomist that lived during the 16th century, considered as the father of modern anatomy. During this life, Vesalius studied anatomy mainly using dissection and observing the tissues, organs, and structures in them, especially those in animals and humans. Also, he used his findings and ideas to create written works that were the base for later studies in anatomy. Besides this, as compound microscopes for studying living organisms had not been created during Vesalius time, he only used regular observations different to other scientists such as Hooke or Malpighi. Thus, it was Vesalius the one that formed his ideas by performing observations without using a microscope.
distinguish between the keywords "trait" and "allele".
Locard’s exchange principle is best described as
A) No two pieces of evidence have any similar markings
B) A scientific experiment has been generally accepted by experts
C) Evidence at a crime scene should be replaced with evidence from the victim’s home
D) There is a transfer of evidence when two objects come into contact with each other.
Answer:
There is a transfer of evidence when two objects come into contact with each other
Explanation:
Dr. Edmond Locard's exchange principle states that whenever two objects come in contact, a transfer of material occurs
Which items would NOT be allowed in a wilderness area?
fishing gear
jet skis
camping gear
hiking gear
Is it Jet Skis??
A scientist wants to test how much of a base can be added to a solution before the pH of the solution changes to above a certain point. The starting pH of the solution is 7.0, and the scientist wants to know when the pH of the solution changes to above 8.0.Which pH indicator should the scientist use? A.Methyl yellow, which changes from yellow to red around a pH of 4.0 B.Congo red, which changes from red to violet around a pH of 5.0 C.Alizarin yellow R, which changes from yellow to red around a pH of 10.2 D.Phenolphthalein, which changes from colorless to purple around a pH of 8.3
The right answer is D.Phenolphthalein, which changes from colorless to purple around pH of 8.3 (since it is the closest to pH 8).
Phenolphthalein (the symbol φφ (phi-phi) or the general notation HIn, common to other indicators, are used) is an organic compound of formula C20H14O4. It is a pH indicator (or a colored indicator), that is to say, a compound that changes color according to the pH value of the solution in which it is placed.
Which statement explains the difference between a nerve that is connected to the skin and a nerve that is connected to a muscle?
The nerve that is connected to skin is a motor neuron; the nerve that is connected to a muscle is a sensory neuron.
The nerve that is connected to skin receives stimuli information from the external environment; the nerve that is connected to a muscle receives processed stimuli information from the brain.
The nerve that is connected to skin is part of the central nervous system; the nerve that is connected to a muscle is part of the peripheral nervous system. The nerve that is connected to skin helps the body maintain homeostasis; the nerve that is connected to a muscle supports the body so it can stand upright.
The right answer is B. (the second one).
Sensory information is detected by peripheral sensory receptors (such as those at the skin) and is transmitted to the central nervous system via sensory neurons, otherwise known as afferent fibers.
The motor nerves carry motor control from the central nervous system to the effectors that are mainly the muscles. These efferent nerve fibers originate in the central nervous system.
what is the purpose of the cell organelles?
. Carbon-14 is used to determine the time an organism was living. The amount of carbon-14 an organism has is constant with the atmosphere, but when an organism dies the carbon-14 decays at a half-life of 5,730 years. If an archeologist measured the amount of carbon-14 in an organism and it was 25% of the total amount of atmospheric C-14, what is the age of the organism?
The answer is 11460 years
WILL UPVOTE!
Factor the expression.
x^2 - 49 =
Genetic variations may result from which of the following? CHOOSE ALL THAT APPLY.
Question 1 options:
Genetic recombination during meiosis.
Errors occuring during DNA replication.
Mitosis producing 2 identical daughter cells.
Cell differentiation, which leads to genetic variation.
Mutations caused by environmental factors.
Which of the earth's spheres contains its plants and animals? atmosphere biosphere hydrosphere lithosphere?
Answer:
biosphere
Explanation:
Even in an adult, some cells continue to divide. Why is cell division useful even in an adult who is no longer growing?
Cell division in fully grown adults is important for the replacement, repair, and regeneration of cells, aiding in the maintenance and repair of tissues. The process begins at the zygote stage and continues throughout life. Certain cells, such as stem cells, also have the unique ability to continue dividing and create new cells as needed to help maintain body health.
Explanation:
In a fully grown adult, cell division continues to play a crucial role in the repair and regeneration of tissues. This phenomenon begins from a zygote in sexually reproducing organisms where trillions of cell divisions occur to produce a complex, multicellular organism. Even when growth is complete, cell reproduction remains vital for replacing lost or damaged cells, such as skin cells and blood cells.
In addition, some cells like stem cells have the ability to continually divide and regenerate new stem cells rather than specializing, which helps in maintaining the body's health as it can give rise to different types of cells needed for tissue repair or replacement. For instance, adult bone marrow contains hematopoietic stem cells, endothelial stem cells, and mesenchymal stem cells, which produce various types of cells like red blood cells, white blood cells, and various types of muscle cells respectively.
Therefore, cell division in adults is primarily for the maintenance and repair of tissues, not for growth or increase in size unlike in younger organisms. Any irregularities in this regulated process can lead to adverse effects and diseases.
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How does RNA differ from DNA?
A. RNA contains uracil and deoxyribose
B. RNA contains ribose and thymine
C. RNA contains uracil and ribose
D. RNA contains uracil, thymine, and ribose
DNA and RNA differ in their structure and function. DNA contains deoxyribose sugar and thymine, while RNA contains ribose sugar and uracil. RNA transmits genetic information from DNA to proteins.
Explanation:The key differences between RNA and DNA are found in their structure and function. DNA (Deoxyribonucleic Acid) contains deoxyribose sugar, has thymine as a base (along with adenine, guanine, and cytosine), is double-stranded and primarily functions as the storage material for genetic information.
On the other hand, RNA (Ribonucleic Acid) has ribose sugar, contain uracil instead of thymine (the other bases are adenine, guanine, and cytosine), is single-stranded, and serves as the intermediary in the process of converting genetic information from DNA into proteins. Thus, the correct answer is: C. RNA contains uracil and ribose.
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Why is it important for the cells of multi-cellular organism to undergo mitosis?