Answer:
a) Teeth arose from the rough scales of ancestral sharks.
b) Skeletal developments leading to the amphibian movement onto land probably evolved from lobe-finned fishes.
d) The anterior gill arch formed the basis for the evolution of the vertebrate jaw.
Explanation:
The animals we know today have physical characteristics that are evolutionary adaptations of characteristics of their ancestors, which have undergone a series of evolutions and modifications over the years giving rise to new species that have resulted in the species we know today. This process of evolutions and adaptations also happened with the ancestral species of fish, which allowed that today, they had characteristics such as teeth and jaws. Many of these evolutions occurred even in different species, such as the evolution that allowed the amphibians to have a skeleton, which evolved from the spine fins of fish.
which factor can decrease the rate of a chemical reaction
Answer:
catalysts can decrease the rate of chemical reaction
Answer:
Temperature
Explanation:
Which process puts carbon into the ground?
O coal burning power plant
O volcano eruption
O decaying plants and animals
O animal respiration
A material was cooled from 100ºC to 40ºC. What is the temperature change?The specific heat of water is 4.18J/goC. I need the full explanation would mean a lot to me.
Answer:
-60°C
Explanation:
According to this question, a material was cooled from 100ºC to 40ºC.
The temperature change, which is symbolized by ∆T = final temperature - initial temperature
That is, ∆T = T2 - T1
In this question, T2 = 40°C, T1 = 100°C
Hence, ∆T = 40°C - 100°C
∆T = -60°C
I'll give points + brainalist for the correct answer (:
Answer:
I THINK the answer youre looking for is B.
can someone do my last question its biology
Answer:
a
Explanation:
they drop leaves and almost hibernate for the winter, like some animals!
Answer:
I would say B cause when it's cold leafs fall off
A local gardener found small green aphids sucking the juices from a clover bush. This causes the clover bush to lose nutrients. What type of ecological relationship exists between the aphids and the clover bush?
Answer:
the circle of life is considered here
plant grows
bugs are born
bugs eat plants
plants regrows from seeds that are dropped
and that repeats!
Explanation:
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below.
Fill three-fourths of a glass jar with water.
Add a teaspoon of liquid dish soap and a teaspoon of vinegar to water.
Tighten the lid and shake the jar to mix the ingredients.
Swirl the jar in a circular motion and watch the spinning motion of the liquid inside.
The student’s experiment demonstrates the formation of
A- blizzard due to the interactions between the hydrosphere and geosphere
B- hurricanes due to the interactions between the geosphere and atmosphere
C- tornadoes due to the interactions between the hydrosphere and atmosphere
D- thunderstorms due to the interactions between the hydrosphere and cryosphere
Answer:
Its C
Explanation:
-Ella-
The experiment performed by student only creates the vortex, caused by the interaction between the liquid and its movement in the jar. Therefore, none of the statements are true.
What is vortex?The experiment performed by student involves mixing water, dish soap, and vinegar in a jar, thereby, creating a solution having a lower surface tension than plain water. Due to swirling of the jar, the liquid inside the jar spins creates a difference in surface tension between the center and the edges of the jar.
This effect is known as the vortex, caused by the interaction between the liquid and its movement in the jar.
The experiment by the student does not demonstrate the interaction between Earth systems. Blizzards and hurricanes occur due to interaction between the atmosphere and the Earth's surface, while tornadoes and thunderstorms occur due to atmospheric convection currents.
Therefore, only vortex is caused by the interaction between the liquid and its movement in the jar.
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4. What are carbon dioxide levels now? How often in the past 650,000 years have they been that high?
short answer please:)
Answer:
Explanation:
Scientists at the Mauna Loa observatory in Hawaii say that CO2 levels in the atmosphere now stand at 387 parts per million (ppm), up almost 40% since the industrial revolution and the highest for at least the last 650,000 years.
Answer 10 and 11 please
Answer:
the answers volune of headAnswer:
10. A11. CHope this helps
What did Ari draw?
O a food chain
O a trophic chain
a food web
O an energy web
Answer:
food chain
Explanation:
The grass is the primary source of food in the food web. Rabbit, Mouse, and grasshopper are the animals that eat the grass. The grasshopper is eaten by a shrew and a mouse.
21. What would happen if there were two populations of animals living in
the same habitat that ate the same types of foods? *
Answer:
Extinction of both plant and animals.
Explanation:
If two populations competed for the same food the food would become to be less. Making both populations dying off due to not having a good source.
OP.7
1. What are three main parts that make up a nucleotide
Answer:
A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T).
When does the first quarter phase of the moon occur?
a. two weeks after the new moon phase
b. three weeks after the new moon phase
c. two weeks after the third quarter phase
i think this will help you
4. Choose the correct answer.
What are human body tissues?
made of organs and organ systems
created by humans for the support of the most basic needs
made of elements that cannot be broken down by simple means
large groups of the same type of cell, all working together for one purpose
most basic part of the human body
5. Check Two that apply.
00:40:46
Answer:
Large groups of the same type of cell, all working together for one purpose.
Explanation:
Human tissues are the group of cells that work together to perform a specific function. In tissues, similar type of cells combine together for performing similar function. The cells in tissue are same type means same size and structure. When a group of tissue combine together, it forms organ. These tissue can be broken down into simpler substances which are the cells that are considered as the basic unit of life.
which nutrients does a plant get from the soil?
Nitrogen, phosphorus and potassium
Answer:
NPK or nitrogen (N), phosphorus (P) and potassium (K)
and any other important nutrients are
calcium, magnesium, and sulfur.
Two indicators that will help you in determining which way to mount bite-wing radiographs are (1) the curve of Spee curves _______________ toward the distal, and (2) mandibular molars have __________ distinct roots.
Answer:
The correct answer is - upward, two.
Explanation:
The bitewing radiograph (BW) is a radiography image that is used to see the crowns of the maxillary and mandibular teeth, the interproximal surfaces of the teeth, and identifying interproximal caries.
The curve of the spee is also can be seen and mount with this image the curve of the spee is start at the tip of the lower canine, rn with the buccal cusp tips of the premolars and molars and continuing to the anterior end of the ramus. it is 2-D and upward from distal. It also shows that mandibular molar teeth have two distinct roots.
Imagine that a friend read this same article and summarized it by saying, "Because there are more
plants now, the amount of carbon dioxide in the atmosphere is decreasing." What is incorrect about
your friend's assessment?
Answer:
The amount of carbon dioxide in the atmosphere is increasing, not decreasing. However, it is not increasing as fast as scientists predicted it would, which they attribute to the amount of carbon dioxide absorbed by plants.
Explanation:
From plato
Mushrooms are usually considered part of the microbial world because their fungal hyphae are microscopic. Some mushrooms have a fruiting body known as a ___ that is visible to the naked eye above ground.
Answer:
Basidiocarp
Explanation:
This is a multicellular structure found in mushroom that are visible to the naked eye and are spore producing. They are the structures of which spore producing basidia are formed. They called called false ruffles. The basidiocarps serve as the structure on which the hymenium is produced. They are the fruiting bodies of mushroom.
a. nuclear energy
b. geothermal energy
c. fossil fuels
Answer:
c
Explanation:
Answer: Fossil Feuls
Explanation:
Coal, oil, and natural gas are fossil fuels that are energy that were produced from the remain of organisms that lived millions of years ago.
Which of the following best explains why the polymerase from the species T. aquaticus is often used for PCR?
Answer:
B) T. Aquaticus polymerase does not denature at high temperatures.
Explanation:
i did it
PLEASE HELP WILL MARK BRAINLEST!
Answer:
it is B
Explanation:
In this food chain, Shrubs(Producer)>Deer(Primary Consumer)>Fox(Secondary.
Consumer), if shrubs have 6,000 Kcal of energy available to it, then the amount of
energy available to the Fox is....
a) 60 kcal
b) 600 kcal
C) 0.6 kcal
d) 6 Kcal
Answer:
it's b
Explanation:
take a zero away every time you move up
_________________________ is a process of forming proteins based on a sequence of DNA. The first step of the process in which DNA is copied into RNA is called ______________________. _______________________ is the second step, is the process of combining amino acids to form proteins. *
Answer:
Transcription, translation
Explanation:
Protein synthesis is the first blank
Transcription is the second blank
mRNA Translation is the third blank
Madelyn was to identify cells as plant or animal. How can she pinpoint which are plant cells?
Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall
Which one is more biologically disruptive a point mutation or a frameshift mutation
Answer:
Frameshift
Explanation:
A point mutation can be insignificant due to the genetic code, many amino acids come from similar codons (where one base can be incorrect and it results in the same amino acid). If it does change the amino acid, having only one different amino acid in a whole polypeptide chain usually does not cause a major problem.
However, a change in the reading frame can be a major issue because it changes every codon form what it should be. A frame shift mutation can even prevent the translation of a protein entirely if it effects the start or stop codon.
Terribly articulated, but the answer is 100% frameshift
25 POINTS & BRAINLIEST!!
Which of the following is an accurate statement about pathogens? (2 points)
Infection and disease are caused by pathogens living in infectious agents found in the environment.
Pathogens, which cause infection and disease, are the most abundant organisms in the environment.
Most organisms in the environment are harmless, except for pathogens, which can cause disease.
The environment is rich in infectious agents that transmit disease through pathogens.
Answer:
I believe it is d
Explanation:
The answer is Most organisms in the environment are harmless, except for pathogens, which can cause disease.
The oldest and broadest pathogens are any organism or pathogen that can cause disease. Pathogens are sometimes called infectious pathogens or simply bacteria. The term pathogen came into use in the 1880s.
Pathogens are usually defined as microorganisms that cause or can cause disease. Pathogens are defined as microorganisms that can harm the host.
Various microorganisms can cause illness. Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms. Some common pathogens in each group are listed in the column on the right.
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Although effective in treating erectile dysfunction, Viagra has the side effect of reducing systemic blood pressure by causing ______.
An environmental change is occurring due to continents shifting and moving to different parts of Earth’s surface. What kind of change is this?
a short-term change due to tectonic plate movement
a long-term change due to tectonic plate movement
a short-term change due to increasing levels of solar energy
a long-term change due to increasing levels of solar energy
Answer: B
Explanation:
Answer:
B.
Explanation:
Why do you make your conclusion about your hypothesis?
what is likely to happen to a water molecule entering lamella in the process of photosynthesis
Answer: Explanation: The granum is a part of the chloroplast. The chloroplast contains the chlorophyll pigment and it is necessary for the trapping of the energy present in the sunlight. As a result of this the photolysis of water takes place and hence water is broken down from water molecule to proton and oxygen
Explanation: