A proposed explanation in evolutionary biology stating that species are generally stable over long periods of time. occasionally there are rapid changes that affect some species which can quickly result in a new species.
Most of the wood used for fuel comes from native forests around the world. The harvesting of wood for an energy source has serious environmental implications. Identify the environmental concerns of harvesting wood.
A) soil erosion
B) cost of harvesting
C) habitat destruction
D) habitat destruction and soil erosion
what type ofreproduction produces fungi that are different from either parent
A client at 42 weeks' gestation is 3 cm dilated and 30% effaced with membranes intact and the fetus at +2 station. fetal heart rate (fhr) is 140 to 150 beats/minute. after 2 hours, the nurse notes on the external fetal monitor that for the past 10 minutes, the fhr ranged from 160 to 190 beats/minute. the client states that her baby has been extremely active. uterine contractions are strong, occurring every 3 to 4 minutes and lasting 40 to 60 seconds. the nurse suspects fetal hypoxia based on which finding?
Which of the following aids in the weathering and transportation of rocks?
A.
wind
B.
clouds
C.
sunlight
D.
all of these
The hershey-chase experiments on bacteriophages showed that the genetic information is carried in
2. Which type of microscope can produce three-dimensional images of a cell’s surface? (1 point)
transmission electron microscope
scanning electron microscope
dissecting microscope
compound light microscope
3. Which of the following distinguishes a prokaryotic cell from a eukaryotic cell? (1 point)
the presence of a nucleus
the presence of a cell membrane
the ability to interact with the environment
the ability to reproduce
At rest, which of these plays a role in establishing the charge differential across a neuron's plasma membrane? at rest, which of these plays a role in establishing the charge differential across a neuron's plasma membrane? the sodium-potassium pump moving sodium ions into the neuron and potassium ions out of the neuron the diffusion of sodium ions out of the neuron the diffusion of potassium ions into the neuron the sodium-potassium pump moving sodium ions out of the neuron and potassium ions into the neuron the diffusion of sodium ions into the neuron
A place where a bone contacts another bone is called a joint or a(n) ______________.
What are the components of adenosine triphosphate (ATP)?
Adenosine triphosphate (ATP) is the cell's energy currency, essential for energy transfer and metabolism in all living organisms. It plays a crucial role in cellular energy processes.
Here’s a detailed breakdown of its components:
Adenosine:
Adenosine is a nucleoside consisting of two main parts:Three Phosphate Groups:
Attached to the adenosine molecule are three phosphate groups. These are structured in a specific order:These three phosphate groups are linked by high-energy phosphoanhydride bonds, which, when broken, release energy that is utilized by the cell for various functions such as:
Muscle ContractionTransport of Molecules in and out of cellsBiochemical Reactions (anabolism and metabolism)When ATP is hydrolyzed, meaning it reacts with water, it breaks down into adenosine diphosphate (ADP) and an inorganic phosphate (P₁). This reaction can be summarized as follows:
[tex]\text{ATP} + \text{H}_2\text{O} \rightarrow \text{ADP} + P₁ + \text{free energy}[/tex]
The energy released during this process powers many cellular activities. Subsequently, the cell can regenerate ATP from ADP and P₁ by using energy obtained from various metabolic processes:
[tex]\text{ADP} + P₁ + \text{free energy} \rightarrow \text{ATP} + \text{H}_2\text{O}[/tex]
In summary, ATP is made up of:
Adenine and ribose (forming adenosine)Three phosphate groupsPoundja, j., fikretoglu,
d., & brunet,
a. (2006). the co-occurrence of posttraumatic stress disorder symptoms and pain: is depression a mediator?
Which of the following describes organelle structures that plant and animal cells have in common?
A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.
B) They both have a central vacuole that stores water and food and mitochondria that releases energy from glucose molecules.
C) They both have chloroplasts where conversion of light to chemical energy occurs and a cell membrane that serves as a selective barrier for the cell.
D) They both have a cell wall that provides protection and support and a nucleus where DNA is stored.
(I think its A)
Answer:
A) They both have ribosomes that are used to synthesize proteins and a cell membrane that serves as a selective barrier for the cell.
Explanation:
It is not B because animal cells do not have big vacuolas if they had any they are small, but it is common to have them in vegetal cells.
It is not C because animal cells do not have chloroplasts because they do not do photosynthesis its energy is taken by metabolizing nutrients from food.
It is not D because the animal cell does not have a cell wall. Is made principally of cellulose, a kind of carbohydrate, and its function is to protect the cell.
When curare, a neuromuscular poison, is dropped onto an isolated muscle-nerve preparation in a laboratory, the muscle does not contract when the nerve is stimulated, even though neurotransmitter is released from the nerve cell. why does this happen? how might this action of curare be lethal to an individual who has been poisoned?
Based on genetic analysis of living primates calibrated by the fossil record, around when is it estimated that apes and old world monkeys diverged into separate lineages?
a. 10 mya
b. 25 mya
c. 15 mya
d. 5 mya
The anterior and posterior lobes of the pituitary gland are regulated by the ____
Anterior lobe and posterior lobes come together and makeup pituitary gland. Anterior pituitary regulates the physiological process. For example, growth, reproduction, lactation, and stress.In case a person wants to know his or her proper functioning of anterior pituitary and organs are regulating, he or she should ascertain through blood tests which measure hormone levels.Anterior pituitary has three regions.
(i) Pars distalis. This is where the production of the bulk of pituitary hormone occurs. It has chromophil cells and chromophobe cells. These cells produce hormone of anterior pituitary which releases them bloodstream.
(ii) Pars tuberalis. It is extended from pars distalis and forms part of the sheath.
(iii) Pars intermedia. It stays between posterior pituitary and pars distalis.
The hypothalamus is the regulation of anterior and posterior lobes of the pituitary glands.
Which pairings match protozoa with the structures they use to move? amoeba: flagellum; euglena: pseudopod; paramecium: cilia amoeba: pseudopod; euglena: cilia; paramecium: flagellum amoeba: pseudopod; euglena: flagellum; paramecium: cilia amoeba: flagellum; euglena: cilia; paramecium: pseudopod?
Answer:
1. Cillia - Paramecium
2. Flagellum - Euglena
3. Pseudopodia- Amoeba
________ use inorganic electron donors released from deep-sea hydrothermal vents.
Corals are polyps of coelenterates (cnidarians) that contain numerous algae in their tissues. the algae contain photopigments that give the corals their color. when stressed by high temperatures, water pollution, or similar shocks, many corals expel their algae and turn white, a process called "coral bleaching." this appears to help the coelenterates survive the initial shock, but if they do not recover their native algae quickly, they soon die. similarly, the algae cannot live for long outside of the coelenterates' bodies. based on this information, the relationship between the two organisms is most likely
1 what does it mean when we say a muscle contracts involuntarily? describe one body function that is linked to an involuntary muscle contraction.
How an alpine glacier can change the topography of a mountainous area
Alpine glaciers reshape a mountain's topography via erosion, creating features like sharp peaks and serrated edges. The movement of glaciers, facilitated by pressure-induced melting beneath them, causes the gradual wearing down of the mountainous rocks. Additionally, shifting climate gradients due to global warming can prompt further changes.
Explanation:An alpine glacier can significantly alter a mountain's topography through processes of erosion. When a mountain range is created through the upthrusting of the Earth's crust, its rocks become vulnerable to erosion caused by elements like wind, water, and ice. In particular, ice—through the form of moving glaciers—carves and shapes the mountain.
The immense pressure beneath glaciers leads to partial melting, which results in a water layer enabling glacial movement. As glaciers move, they scrape against the mountainous rocks, gradually wearing them down and dramatically changing the terrain's shape. Over time, this process results in features such as sharp peaks and serrated edges often associated with mountain ranges.
Moreover, climate gradients also contribute to these changes. As global warming intensifies, these gradients move higher up the mountains, potentially transforming habitats and changing the overall climate of these elevations. Subsequently, the continual melting and freezing cycles of glaciers could be jeopardized, impacting the supply of freshwater from higher elevation mountains.
Learn more about Glacial Erosion here:https://brainly.com/question/14239277
#SPJ12
The argument that modern homo sapiens evolved first in africa, migrated outward, and eventually replaced archaic homo sapiens is known as the
There appears to have been several waves of movement of modern humans out of Africa to other continents. The earliest was approximately 270,000 years ago, and then again around 130,000 years ago. These earlier migrations appeared to have mostly died out.
The most significant wave occurred 70,000 years ago, which spread along the coast of Asia, reaching Australia around 65,000–50,000 years ago.
What holds the pollen and produces the males sperm on a flower?
Which of these definitions of species most closely fits the biological species concept? members of the same species can mate and produce fertile offspring. members of the same species look almost exactly alike. for asexually reproducing organisms, members of the same species are based on dna and rna base sequence analysis. members of the same species are all morphologically similar?
The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from...
A. an increase in cellular respiration
B. increased decomposition by bacteria
C. an increase in the burning of fossil fuels
D. an increase in photosynthesis
Dna fingerprinting is based in part on recombinant dna technology and in part on those techniques originally used in medical genetics to detect slight variations in the genomes of different individuals. these techniques are used in forensic pathology to compare specimens from the suspect with those of the forensic specimen. what is being compared when dna fingerprinting is used in forensic pathology?
describe eggs and egg laying in monotremes
Either type of reproduction will result in the continuation of a species, but one method results in genetic variation as well. All BUT ONE is a reason why sexual reproduction better serves survival of the fittest and evolution of a species.
Characteristics of parasitic nematodes and give us an example of infective eggs
What type of bond holds the amino acids together in the proper sequence at the ribosome?
The peptide bond is responsible for holding the amino acids together.
What is the peptide bond?
A bond that is formed by a dehydration synthesis reaction happening at a molecular level between two molecules of amino acids is called a peptide bond.
This kind of reaction is also called a condensation reaction. This usually happens between amino acids. The two amino acids combine with each other to form a peptide bond through a reaction termed dehydration synthesis.
During this reaction, the carboxyl group of one of the amino acids loses a hydroxyl group. The amino group from the other amino acid also loses hydrogen from the ammonia group. The hydroxyl group in the first amino acid is replaced by nitrogen and that is how a peptide bond is formed.
Also, this is why the peptide bonds are also referred to as substituted amide linkages. Both the amino acids in the peptide bonds are covalently bonded with each other. The amino acids that are formed are also called a dipeptide.
Therefore peptide bonds hold amino acids together.
Read more about peptide bonds, here
https://brainly.com/question/15078143
#SPJ6
On which part of the body does long-term use of stimulants (e.g., nicotine, cocaine, and methamphetamine) have the most significant impact?