respiration
photosynthesis
a mass extinctions is
Answer:
Mass extinction is when biodiversity or species in a living habitat decreases to about three-fourths of its original number or to none. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. It occurs when the rate of extinction increases with respect to the rate of speciation. Mass extinctions are usually associated with organisms that are macroscopic rather than microscopic. Examples of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
Which of the following statements best describes what happens during exercise?
(Please explain why each of the incorrect statements are wrong. Thank you!)
A.
Blood vessels in the muscles dilate to increase blood flow.
B.
Blood vessels in the heart dilate to increase blood pressure.
C.
Blood vessels in the organs dilate to increase blood oxygen.
D.
Blood vessels in the lungs dilate to increase blood volume.
The fossil presence of anatomically modern humans in ________ demonstrates that our ancestors were capable of substantial water crossings by 40,000 years ago.
Answer:
The correct answer is - Africa.
Explanation:
Scientists found the fossils of modern humans called Mota an ancient man who lived around 40000 to 45000 years ago in Ethiopia. It was the first DNA isolated from Africa.
This DNA sample says that the Europeans have 6% of the DNA of this modern human, which suggests that there was substantial migration of people into Africa from Europe and the middle east by water crossings.
Which of the following are adaptations present in plants or animals that live in the understory level of the rainforests? (Choose all that apply.)
a. large eyes to see in the darkness
b. broad leaves to catch available light
c. vines and structures to climb towards sunlight
d. thick, waxy leaves
Answer:
large eyes to see in the darkness
b. broad leaves to catch available light
c. vines and structures to climb towards sunlight
Explanation:
This because Adaptation refers to the ability of plants or animals to adapt, survive and reproduce in it's environment through its developed structural which help it to do so. Plants in the rainforest enjoy abundance of rain and there are thick forest of trees and shrubs. Therefore animals there normally have broad eyes to see in the darkness because the trees form shade easily. The plants normally have broad leaves to receive sunlight
Answer:
- broad leaves to catch available light
- vines and structures to climb towards sunlight
- large eyes to see in the darkness
Explanation:
Organisms that live in rainforests have adaptations that enable them to live in the different conditions that exist in each layer.
in some flowers, red and white color is codominant. Flowers and be red ( RR), white (rr) or pink (Rr) if two pink flowers are crossed! what percentage of the offspring will also be pink ?
Answer:
50%
Explanation:
If you do a punnet square you get 1 RR: 2 Rr: 1rr
What are possible effects warming the atmosphere?
During DNA replication, if a portion of the original strand is CTGACTT, then the new strand will be
O GACTGAA
TTCAGTC
AGTCTGG
GACUGAA
Answer:
GACUGAA
Explanation:
it's the opposite letters
why are minerals important for our body? describe the 2 groups of minerals
Minerals are needed for the proper composition of body fluids, including blood, and for the proper composition of tissues, bone, teeth, muscles and nerves. Minerals also play a significant role in maintaining healthy nerve function, the regulation of muscle tone, and supporting a healthy cardiovascular system. There are two kinds of minerals: macrominerals and trace minerals.
Explanation:
.
Manipulate the settings to model the scenario. Observe what happens to the
observations in the Lab Guide,
About laboratory work
Stream Slope
Gentle
Amount of Rainfall
None
Surrounding Terrain
Plain
Mountains
Check
Pause
5 of 10
Answer:
subject?
Explanation:
what are the 5 main important functions of soil
Answer:
Six key soil functions are: Soil acts as an anchor for plant roots. It provides a hospitable place for a plant to live in while storing and supplying nutrients to plants. Soil also functions by maintaining the quantity and quality of air by allowing CO
Explanation:
I’m not sure but do anybody know this ♀️
Fonseca is taking a test. She has to write about adaptations of fish in the coral reef. What should she write?
A.
that some fish in the coral reef are blind due to the absence of sunlight
B.
that some fish in the coral reef survive on marine detritus
C.
that some fish in the coral reef are colorless to protect against prey
D.
that some fish in the coral reef have flat bodies to perform sharp turns
Answer:
that some fish in the coral reef have flat bodies to perform sharp turns
To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the insertion of a drug resistance marker, the cells Multiple Choice that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. that lack the transgene grow in the presence of the drug and these are injected into a host blastocyst. that have deleted the transgene grow in the presence of the drug and the nuclei are injected into a host blastocyst. that lack the transgene grow in the presence of the drug and the nuclei are used for nuclear transfer.
To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the insertion of a drug resistance marker, the cells, that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. The correct option is A.
What is biological marker?A biomarker is an objective measure of what is going on in a cell or organism at any given time. Biomarkers can serve as health-related early warning systems.
To create knockout mice, researchers insert artificial DNA into the chromosomes contained in the nuclei of ES cells using one of two methods.
Both methods are performed in vitro, that is, on cultured cells grown in a laboratory setting.
After introducing a DNA construct into ES cells that mutagenizes a specific gene by inserting a drug resistance marker, the cells that have incorporated the transgene via homologous recombination grow in the presence of the drug and are injected into a host blastocyst.
Thus, the correct option is A.
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Because of global climate change, arctic landscapes and ecosystems are changing rapidly and perceptibly, as the residents of Newtok, Alaska, can attest. With the land upon which they have built their homes slowly melting and sinking, they have appealed to the state and federal governments for assistance in helping them cover the costs of moving their town to a different location. Ironically,
A) the land upon which the Alaskan state government buildings are located is also melting.
B) the residents of Newtok have discovered oil on their land, making their appeal for funds less convincing.
C) a senator from Alaska has a vacation home in Newtok, Alaska, and so is personally committed to the predicament of the town.
D) decades ago, the U.S. government mandated that they and other Alaskan natives abandon a nomadic life based on hunting and fishing for sedentism.
E) the economic activity of the town of Newtok is extremely polluting and thus a big contributor to the environmental changes that have turned its residents into the first climate change refugees in the United States.
Answer:
The correct answer is D)
Decades ago, the U.S. government mandated that they and other Alaskan natives abandon a nomadic life based on hunting and fishing for sedentism.
Explanation:
Sedentism is simply the practice of settling in one geographical location for a long time.
Many governments encourage this to ensure that agricultural systems become developed and more sustainable as was the case in Alaska.
Other governments in some part of the world are also in support albeit for a different reason such as security of lives and property.
Cheers
Which of the following is NOT a way to conserve and/or protect natural resources?
A throwing away plastic water bottles
B. replanting trees that have been cut down
C. taking shorter showers
D. turning the heat down at bedtime
Answer:
C) Taking Shorter Showers
Explanation:
If humans are really intelligent and not simply manipulated by their genes like
any other animal, why can't they do anything about overpopulation?
Answer:
Explanation:
What about war? Why can't we do anything about war?
How about our needs and wants beyond shelter and food?
Of all the things plaguing the world, I think over population is one of the things we can do something about. You are right. But needs and wants play a huge role in why we can't seem to do anything right.
Of course on thinking it over, we have problems that have their roots in overpopulation like pollution.
The role of the 23S rRNA of the large ribosomal subunit of E. coli during protein synthesis is: Question 50 options: helps to form the A site within the ribosome contributes to the process of translocation during the elongation stage of protein synthesis none of these choices is correct actively forms a peptide bond by acting as a ribozyme aid in initiation of protein synthesis
Answer:
Actively forms a peptide bond by acting as a ribozyme aid in initiation of protein synthesis.
Explanation:
The role of the 23S rRNA of the large ribosomal subunit of E. coli during protein synthesis is the formation of a peptide bond by acting as a ribozyme aid in initiation of protein synthesis. 23S rRNA has an important function of peptidyl transferase. Both peptidyl-tRNA and aminoacyl-tRNA are necessary for synthesis of protein and transpeptidation response. The 23S rRNA positions have a significant function in the binding of tRNA in P site of the large ribosomal subunit.
Give an example of homologous and analogous structures
homologous: the forelimbs of vertebrates
analogous the wings of an insect, bird, and bat
What is the main function of the organs shown
Answer:
In an organ, different tissues work together to carry out a particular function. These are the main organs, as well as their primary function: The brain controls thoughts, memory and other organs. The heart pumps blood around the body.
Explanation:
5. Which of the following catastrophic events usually affects only coastal regions?
A. floods
B. hurricanes
Answer:
both but floods are more often
Explanation:
hope it hels
To start an action potential moving down the axon, what must happen?
Answer:
Different ions cross the neuron membrane and stimulus causes sodium channels to open I think.
What is the major issue that we are faced with as discussed in this video kiss the ground What is the proposed solution? plssss
Which human organ system’s function is most similar to the function of a cell wall in plant cells?
Answer:
The cell wall, vacuole, and chloroplast are found in plant cells not human body.
Answer:
the respiratory system!
Explanation:
i just took a quiz and this was one of the questions, i got it right
Which of the following describes a portion of the water cycle that is not driven by
gravity? O
(1 Point)
B) Precipitation of water that has condensed from clouds
D)Water seeping into the ground to enter an aquifer
C)Water flowing in a river toward the ocean
A) Evaporation of water from the ocean to form clouds
The correct answer is A. Evaporation of ocean water to form clouds.
Explanation
The water cycle is a series of physical-chemical phenomena in which water goes through three states (liquid, solid and gaseous). In this process, the water in a liquid state is evaporated becoming in a gaseous state, and rising towards the sky (against the force of gravity) forming clouds. Once in the clouds, the water condenses, going from a gaseous to a liquid state. After this process, the water precipitates by the action of gravity towards the earth where a process such as the filtration of water in the soil occurs, forming aquifers, the accumulation of water in the rivers that flow into the sea, the freezing of water on the snowy peaks of the mountains, among others. According to the previous explanation, the correct answer is A. Evaporation of ocean water to form clouds.
Select the correct answer.
What is true about the theory of punctuated equilibrium?
A. It relies on the discovery of "missing links."
B. It explains the absence of transition in fossils.
C. It portrays evolutionary change as a smooth curve.
Answer:
C. It portrays evolutionary change as a smooth curve.
Can intersex male get their partners pregant?
Answer:
yes
Explanation:
they can produce sperm
1. A _________
tree is used to show evolutionary relationships among organisms.
2. Binomial nomenclature names organism using their
________and________
3. What is the name of a series of questions that are used to identify an organism?
Answer:
1.ans Phylogenetic Trees
Scientists use a tool called a phylogenetic tree to show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.
2.ans Binomial Nomenclature Rules
The entire two-part name must be written in italics (or underlined when handwritten). The genus name is always written first. The genus name must be capitalized. The specific epithet is never capitalized
3.ans Dichotomous Key
A dichotomous key is a tool created by scientists to help scientists and laypeople identify objects and organisms. Typically, a dichotomous key for identifying a particular type of object consists of a specific series of questions.
A gene is a small section of DNA on a chromosome.
Complete the sentences.
A gene codes for a particular sequence of...
This sequence makes a specific....
Describe how heat will flow
between Part A and Part B
when the tap is opened. Draw
an arrow to illustrate the
direction of heat flow.
Answer:
Explanation:
When you bring two objects of different temperature together, energy will always be transferred from the hotter to the cooler object. The objects will exchange thermal energy, until thermal equilibrium is reached, i.e. until their temperatures are equal. We say that heat flows from the hotter to the cooler object.
What happens to a population when its size is equal to the carrying capacity?
a. Its size fluctuates wildly.
b. It increases in size.
c. Its size stays steady.
d. It decreases in size.
Answer:
C
Explanation:
When a population reachs its carrying capacity it will slow down and become steady due to the population reaching its limit on food, water, etc. and they can only feed so many.
When population size is equal to the carrying capacity then "Its size stays steady".
What is population ?A population means the total number of individuals who cohabit in a certain area.
What is steady-state?A biofilm that exhibits no net growth or degradation over time is usually referred to as a steady-state biofilm.
A population might slow down and stabilize once it reaches it's own carrying capacity since it will no longer be able to consume as much food, water, and other resources.
Therefore, the correct answer will be option (c)
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