Answer:
An eyespot ( or photoreceptor) and a flagellum are useful for supporting the photosynthetic mode of energy generation found in euglenids
Explanation:
What use does the eyespot serve in euglena?
Near the reservoir, one can observe an eyespot on a euglena's anterior end. It can sense light. This supports euglena in locating sunny areas where they may capture sunlight for food preparation.
Euglena has two flagella one flagellum is very short and can not be seen clearly while the second one is large and can be observed. Flagella help euglena in locomotion or movement purposes and also in sensing environment. Flagella also help euglena in photosynthesis. While Euglena uses its flagellum to walk about in looking for food at night, Euglena contains chloroplasts and can do photosynthesis during the day.
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In eukaryotic cells, DNA carries genetic information and is found in the [2.3]
Answer:
DNA is the bloodline.....
Answer:
DNA is found in the nucleus of the cell.
Lesson Worksheet
Multiple Choice
Circle the letter of the correct choice.
1 Which of the following is the basic unit of matter?
molecule
chemical compound
atom
nucleus
2 Water is an example of a(n)
atom
molecule
ion
native element
3 An atom is only an ion if it has more or less
neutrons than electrons
protons than neutrons
neutrons than protons
electrons than protons
4 An example of a pure element is
table salt
silicon dioxide
sulfur
calcium carbonate
5 The crystal shape of a mineral
shows how the atoms are arranged
will always be the same if it is made from the same atoms
can usually only be seen under a microscope
can help account for how hard or brittle a mineral is
True or False
Write true if the statement is true or false if the statement is false.
_______ 6. A molecule is the smallest unit of an element.
_______ 7. Protons and electrons are found in the nucleus of an atom.
_______ 8. Halides (salts) make up the largest group of minerals on Earth.
_______ 9. Coal and diamonds are different minerals because they have a different structures.
_______ 10. In a crystal, the atoms are arranged in a pattern.
Fill in the Blanks
Fill in the blank with the term that best completes the sentence.
11. 90% of Earth’s crust is made of minerals in the group called a(n) ______________________.
12. The _______________ makeup of a material is the different atoms and molecules that it is composed of.
13. Even though calcium carbonate is made by marine animals, it is still ____________________.
14. ___________________ is the substance of which physical objects are made.
15. Electrically neutral particles are called _________________.
Short Answer
Answer:
1. atom
2.
3. electrons than protons
4. salt
5.
6. false
7. true
8. false
9. false
10. true
11. silicate
12. compound?
13.
14. energy
15. neutrons
Explanation:
those are my best answers I'm pretty sure about 12 but not positive and I didn't know about 2, 5 or 13. I hope it still helped though
_____ occurs when the cell membrane surrounds and engulfs large particles, such as white blood cells engulfing bacteria.
a Pinocytosis
b Phagocytosis
c Exocytosis
d Receptor-mediated endocytosis
Answer:
Phagocytosis
Explanation:
During phagocytosis, cells engulf large particles such as bacteria, cell debris, or even intact cells (Figure 12.34). Binding of the particle to receptors on the surface of the phagocytic cell triggers the extension of pseudopodia—an actin-based movement of the cell surface, discussed in Chapter 11.
The law of conservation of energy states that
Answer:
According to the law of conservation of energy, energy cannot be created or destroyed, although it can be changed from one form to another. KE + PE = constant.
Explanation:
hope this helps! mark me brailyest plzz:D
What is the nutrient used to petri dishes to grow bacteria?
The genes for the traits that mendel worked with are either all located on different chromosomes or behave as if they were. How did this help mendel recognize the principle of independent assortment?.
Mendel recognized the principle of independent assortment by working with the genes located on different chromosomes as otherwise, his dihybrid crosses would not have produced a 9:3:3:1 ratio for F2 phenotypes.
Mendel's law of independent assortment states that during a dihybrid cross, the assortment of each pair of traits is independent of the other. This means that, during gamete formation, one pair of traits is separated from another pair of traits independently. The genes for the traits that Mendel worked upon were located on different chromosomes or behaved as if they were. This feature helped Mendel to conclude with his finding as a law of independent assortment.
Gregor Mendel performed dihybrid crosses between organisms having two different traits: seed color and seed shape. One parent was homozygous dominant (YYRR: Yellow round) and the other was homozygous recessive (year: green wrinkled) for two different traits. He produced a heterozygous dominant trait ( YyRr: Round yellow) in the F1 progeny. When F1 progeny was self-crossed, he observed that the phenotypic ratio was 9:3:3:1. This means that the F2 progeny resulted in four different combinations of seeds: wrinkled yellow, round yellow, wrinkled green, and wrinkled yellow seeds.
With the genes located on different chromosomes, it was made easier for Mendel to observe the phenotypes in F2 progeny.
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60 POINTS!! PLEASE HELP!!When the level of blood testosterone has increased past its set point, a negative feedback signal will be sent to the hypothalamus.
Based on the diagram, what will be the result of this signal?
A) The hypothalamus will stop production of gonadotropin-releasing hormone. As a result, the production of follicle-stimulating hormone will increase and testosterone levels will decrease.
B)The hypothalamus will stop production of gonadotropin-releasing hormone. As a result, follicle-stimulating hormone will no longer be produced and testosterone levels will start to decrease.
C)The hypothalamus will stimulate production of gonadotropin-releasing hormone. As a result, the production of follicle-stimulating hormone will increase and testosterone levels will increase.
D)The hypothalamus will stimulate production of gonadotropin-releasing hormone. As a result, the production of follicle-stimulating hormone will be inhibited and testosterone levels will decrease.
Answer:
c
Explanation:
all you need is in the photo
Answer:
primary
Explanation:
Primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time. For example, primary succession may take place following the eruption of volcanoes, such as those on the Big Island of Hawaii. As lava flows into the ocean, new rock is formed.
looking under a microscope, you note that the cell is a prokaryote. how do you know?
it lacks the cell membrane
it lacks nucleus
it lacks genetic material
it lacks cytoplasm
Answer:
It lacks nucleus.
Explanation:
Prokaryotic: cells that lack a true nucleus or membrane bound organelles.
Pro- before Karyo- NucleusWhat would happen if the earth gained .5% more oxygen
Answer:
answer: we
all die the end
_________ ( spores / fragments ) are microscopic single- celled or several - celled reproductive bodies that are mostly spherical in shape.
Answer:
Spores
Explanation:
please mark me brainliest and 5 star
The saliva in your mouth contains amylase. Amylase is an enzyme that breaks down starch and glycogen into glucose, simple sugars.
The sequence of amino acids in the amylase is an example of which level of protein structure
Imagine there are many of the molecules above (Atom A at “more” electronegative, Atom B at “less” electronegative) within close interaction. How would you expect them to orient near each other? Do you think their polarity would strengthen or weaken their interactions and why?
Answer:
their polarity would attract them closer to each other because if one is more electronegative, it would have more electrons, meaning it would have a weak negative charge. If one is less electronegative it would have fewer electrons around it meaning it would have a weak positive charge. Since they have opposite charges or polarity, their attractions are strengthened.
Explanation:
The molecules would likely orient with the more electronegative atom (Atom A) closer to the less electronegative atom (Atom B), forming a polar bond. Polarity would strengthen interactions due to the attraction between opposite charges.
Molecules with atoms of differing electronegativities tend to form polar bonds, where the more electronegative atom gains a partial negative charge (δ-) and the less electronegative atom gains a partial positive charge (δ+). In a scenario where many such polar molecules are in close interaction, their orientation would likely involve aligning the more electronegative atom (Atom A, with higher electron affinity) closer to the less electronegative atom (Atom B, with lower electron affinity).
This orientation is driven by the electrostatic forces of attraction between opposite charges. The partial positive charge on Atom B of one molecule would be attracted to the partial negative charge on Atom A of another molecule, and vice versa. This alignment maximizes the attractive forces between molecules, allowing them to come closer together and establish stronger interactions.
The polarity of the bonds strengthens these interactions. The presence of partial charges on the atoms creates stronger dipole-dipole interactions (also known as van der Waals forces or London dispersion forces) between the molecules. These forces contribute to the overall intermolecular attractions and influence properties like boiling and melting points, solubility, and the stability of molecular structures.
In summary, when molecules with atoms of differing electronegativities interact closely, they are likely to orient in a way that maximizes the attractive forces between them—placing the more electronegative atom closer to the less electronegative atom. The polarity of the bonds formed between these atoms strengthens the interactions by creating partial charges that enhance the dipole-dipole attractions. This behavior is fundamental to understanding the behavior of molecules in various chemical and physical contexts.
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Plss answer I need it. Thank you
please see the attached images. Hope this helps you.
Dose anyone know if I did this right??
Answer:
yea, I got that on my document test I got it wrong but the correction was the exact how you did it, good job
Can someone please help me with this I don’t know the Answer:/ please
Answer:
its either c or d
Explanation:
can't quite remember which
Which best describes how mRNA is produced in a cell?
A. mRNA is made up by lining up RNA nucleotides, using DNA as a template.
B. mRNA is made by duplicating RNA found in the nucleus.
C. mRNA is made by breaking apart DNA and reusing the pieces.
D. mRNA is made by DNA, using RNA nucleotides as a template.
Answer:
d
Explanation:
which is a chamber that receives blood into the heart and drives it into a vebtriclr
Answer:
Atrium,
Explanation: in vertebrates and the higher invertebrates, heart chamber that receives blood into the heart and drives it into a ventricle, or chamber, for pumping blood away from the heart.
Answer:
The Atrium receives blood into the heart and drives it into a ventricle.
Explanation:
I hope this helps! :)
taphonomy is the study of a. the processes that affect a living organism through life. b. human cultural remains. c. the processes that affect an organism’s remains after death. d. human genetics.
Taphonomy is the study of the processes that affect an organism’s remains after death. Even when an organism dies, its affecting activities continue.
The study of taphonomy examines the mechanisms by which organic remnants go from the ecosystem to the lithosphere. Taphonomy includes events that take place after an organism dies (or sheds its components), including decay, burying, and retention as mineralization of fossils or other stable biomaterials.
Necrolysis, biostratinomy, and diagensis are examples of taphonomic processes. Necrolysis is the breakdown of living things after death (the post-burial transformation of the organic material).
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Why are dry land areas not just waterways and wetlands included in a watershed?
Answer:
water is everywhere including dry spots
santosh khanal bacteriological profile in urinary tract infection and their antibiotic susceptibility pattern
In order to ascertain the prevalence and pattern of antibiotic susceptibility of uropathogens among patients at Bharatpur Hospital, this study was carried out.
An increased prevalence of antibiotic resistance among UTI patients signals the need for ongoing surveillance to ensure effective infection control. It can be advised that women, in particular, be aware of proper hygiene practises and use antibiotics sparingly when necessary.
What is Urinary tract infection ?Urine that seems to be hazy. Having urine that is crimson, bright pink, or coke-colored indicates that there is blood in the urine. urine that smells strongly. Women who experience pelvic pain typically experience it in the centre of the pelvis and near the pubic bone.
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Spanish moss hangs on the branch of a live oak tree where it receives greater access to sunlight and distance from herbivores on the ground; the live oak tree is unaffected by the Spanish moss. What kind of symbiosis is this?
Commensalism, as only one side benefits
The relationship between the Spanish moss and the live oak tree is an example of commensalism.
What is commensalism?Commensalism is a sort of symbiotic interaction in which one organism gains advantages from the association while the other organism experiences neither negative effects nor positive effects. In this instance, the Spanish moss benefits from its elevated location on the live oak tree, which gives it better access to sunshine and puts it further away from ground-dwelling animals.
The living oak tree, meanwhile, is unaffected by the Spanish moss' existence and neither gains nor loses from the connection. As a result, the relationship is advantageous to the Spanish moss while having no effect on the live oak tree. This kind of connection is a prime illustration of commensalism.
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How many times do cells undergo Mitosis in order to become a gamete?
Answer:
two
Explanation:
When a cell divides by way of mitosis, it produces two clones of itself, each with the same number of chromosomes. When a cell divides by way of meiosis, it produces four cells, called gametes.
Answer:
Cells do not undergo mitosis to become gametes although Somatic Cells go through Mieosis 1 & 2 to become gametes.
Explanation:
Specifically a somatic cell is split twice where on parent cell ends up into 4 daughter cells through Meiosis 1 and 2
Mitosis produces the exact same cell so if you did mitosis on a somatic cell it would never happen. But if you did it on a cell already a gamete it would only take one division
Tsunamis are the result of
Answer:
Powerful underwater earthquakes.
Explanation:
Answer:
A tsunami is a series of large waves generated by an abrupt movement on the ocean floor that can result from an earthquake, an underwater landslide, a volcanic eruption or - very rarely - a large meteorite strike. However, powerful undersea earthquakes are responsible for most tsunamis
Explanation:
why are fish cold-blooded??? and why animals are warm-blooded
Answer:
Just like reptiles and amphibians.
Explanation:
They get their body temperature from the water that they are in.
In a circuit diagram, what does this symbol represent?
a resistor
a light bulb
a battery
a switch
Answer:
D
Explanation:
Question: are we all edge users on this website? lol
In a circuit diagram, the given image represents the symbol of an electrical switch. Thus, the correct option is D.
What is a Circuit diagram?A circuit diagram may be defined as a graphical representation of an electrical circuit. It consists of a bulb, battery, switch, etc. along with the utilization of a voltmeter, ammeter, etc. It overall represents the flow of electric current within it.
A circuit diagram is also known as an electrical diagram, elementary diagram, or electronic schematic. It is a simplified graphical representation of an electrical circuit. It expresses the relative positions of all the components and their connections to one another. It is often utilized in order to visually represent the circuit to an electrician.
Therefore, in a circuit diagram, the given image represents the symbol of an electrical switch. Thus, the correct option is D.
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Your question seems incomplete. The most probable complete question is as follows:
In a circuit diagram, what does this symbol represent in the image given below?
a resistora light bulba batterya switchdo humans have eucaryotic cells
Answer: yes
Explanation:
Answer: Yes
Explanation: Cells contain 3 feautres cytoskeleton,organelles surrounded by a nuclear envelope so their called euraryotic cells so yes we do contain them.
The picture shows soil that has become compacted.
What is the most likely direct result when soil becomes compacted by human
use?
Answer:D
Explanation:
predict what would happen to the egg white if a raw egg were placed in vinegar. explain your thinking
If the eggshell is placed in vinegar or acetic acid then the shell will dissolve after some time due to absorption of acid and form CO2.
The eggshell is a hard and protecting outer covering or outer surface that keeps the inside material intact against the external environment and pathogenic substances.
It is made of calcium carbonate (CaCO3).
When calcium carbonate reacts with vinegar acids, it dissolves and forms bubbles which indicate the formation of carbon dioxide gas that liberates in the air.
Only soft tissue or the internal thin lining of the shell will remain behind.
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3. Why is it necessary for the cell to grow and duplicate its DNA before the start of meiosis?
Answer:
Since the cell is dividing it needs two copies of it's DNA. One is kept by the parent cell and the other is passed to the daughter cell..... So this process of duplicating DNA is very important, because the daugher DNA cell will likley die.
Explanation: