plant cells do not have centrioles
3. Hydrogen peroxide is used as an antiseptic to kill bacteria in cuts and abrasions. Many of these are catalase positive, yet they are still killed by the actions of hydrogen peroxide. Why does this occur
Answer: Hydrogen peroxide is used as an antiseptic to kill bacteria in cuts and abrasions. Many of these bacteria are catalase positive,
Explanation: that’s it
Where do the light-dependent reactions take place?
a. within the thylakoid membranes
b. within the mitochondria membranes
c. in the outer membrane of the chloroplasts
d. in the stroma of the chloroplast
A, the thylakoid membranes
which means of particle transport requires energy from the cell
Answer:
Active transport requires energy input from the cell.
uh…did i do this right?
Maybe
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This is just ruler command 500pt and 1000pt for long rule
How has earths atmosphere changed over time
Answer:
Hey mate....
Explanation:
This is ur answer.....
When earth was first formed, its atmosphere was likely composed of hydrogen, helium, and other gases that contained hydrogen. Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds.
Hope it helps!
Brainliest pls!
Follow me! :)
Answer:
When earth was first formed, its atmosphere was likely composed of hydrogen, helium, and other gases that contained hydrogen. ... Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds.
Before life began on the planet, Earth's atmosphere was largely made up of nitrogen and carbon dioxide gases. After photosynthesizing organisms multiplied on Earth's surface and in the oceans, much of the carbon dioxide was replaced with oxygen.
Hope that helped. x
chemicals in the body that transmit nerve impulses are:
how we can increase the fertile land?
Answer:
Add Compost. Compost is decomposed organic matter, and it is the best thing you use to improve the health of garden soil.
Get a Soil Test.
Mulch the Soil Surface.
Prevent Soil Compaction.
Rotate Crops Each Year.
Grow Cover Crops.
Add Aged Animal Manure.
Explanation: Soil fertility is the ability of soil to sustain plant growth and optimize crop yield. This can be enhanced through organic and inorganic fertilizers to the soil. Nuclear techniques provide data that enhances soil fertility and crop production while minimizing the environmental impact.
What is the genetic information that must be copied for the next generation of cells called?
A. Gametes
B. DNA
C. Meiosis
D. Mitosis
Answer:
B. DNA
Explanation:
DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA. The information in DNA is stored as a code made up of four chemical bases: adenine, guanine, cytosine, and thymine.
NO LINKS PLEASE!
Metal Mass (9) Volume (cm) Gold 77.28 4.00 Platinum 64.35 3.00 Tungsten 96.75 5.00 Silver 63.00 6.00 29) A jeweler has selected a metal with a density of 19.35 g/cm' to make a ring. Which of the metals was selected?
A) Gold
B) Plantinum
C) Sliver
D) Tungsten
The dark reaction doesn't require sunlight, for energy. Why?
A) It gathers energy from the chlorophyll.
B) It stores energy inside of the chloroplast.
C) It gathers all of its energy and stores it in its Mitochondria
D) It gathers its energy from organic batteries called ATP or NADPH.
Answer: C it gather energy from the mitochondria
what substances are the reactants in photosynthesis
Answer:
The reactants of photosynthesis are everything to the left of the "———>" arrow, thus the reactants of photosynthesis are carbon dioxide, water, and sunlight energy.
The products of photosynthesis are everything to the right of the "———>" arrow, thus the products of photosynthesis are glucose and oxygen.
The diagram shows structures that form the surface of the trachea.
Which level of organisation is the structure labelled S?
A. Cell
B. Organ C. Organ system
D. Tissue
Answer:
which diagram
Explanation:
How does the sexual life cycle of the human species introduce genetic
variations? *
2 points
1. Random fertilization
II. Crossing over of alleles
III. Independent assortment of chromosomes
O I, II, and III
O I and II only
O I only
O I and III only
Can someone plz help me? :(
Answer:
Probably A or B
Explanation:
recently, state forests and parks like yellowstone national park which contain varieties of flowering trees and shrubs, have started to erect signs that state, take nothing but pictures, leave nothing but footprints. which argument best supports why these signs are being placed in state forests and parks?
The argument that best supports why the signs are placed in the parks is that humans have the capacity to cause damages to the stability of ecosystems through their actions.
By removing tissues of plants or even entire plants, the stability of the entire park can be disrupted depending on the role such a plant plays in the ecosystem. Some species of organisms in the ecosystem play key roles and their removal or damages may cause significant disruption to the entire ecosystem.
Also, by leaving things that can be harmful to the plant species in parks, immeasurable damages can be done to the entire ecosystem.
More on biodiversity conservation can be found here: https://brainly.com/question/19672174
The best argument that supports the signs being placed in state forests and parks is: humans are capable of damaging the stability of the ecosystems by removing trees and shrubs.
Different components in an ecosystem interact with each other to ensure biodiversity is sustained. Some species of an ecosystem play important roles and a disruption or removal of such key species would cause disruption in the ecosystem.
Trees and flowers in this said park play important roles in the ecosystem of the park. If they are damaged or removed from the ecosystem, the biodiversity of the ecosystem will be impacted which will cause instability of the ecosystem.
Therefore, the best argument that supports the signs being placed in state forests and parks is: humans are capable of damaging the stability of the ecosystems by removing trees and shrubs.Learn more about ecosystem stability on:
https://brainly.com/question/19672174
what is unique about HIV?
Answer:
HIV is called a retrovirus because it works in a back-to-front way. Unlike other viruses, retroviruses store their genetic information using RNA instead of DNA, meaning they need to 'make' DNA when they enter a human cell in order to make new copies of themselves.
Explanation:
what happens when 2 sunspots connect
Answer:
they can get more stringy and spread out
Changes in water pressure within guard cells cause the cells to open or close the stomata. This response helps the plant maintain homeostasis by
Answer:
reduced water loss
Explanation:
When the water enters the cells, they swell and become bowed. This causes the guard cells to bend away from each other, thereby opening the stomata. Conversely, when guard cells lose potassium ions, water diffuses out of the cells by osmosis.
The response helps the plant maintain homeostasis by regulating water levels that plants lose during transpiration.
What is cellular homeostasis?The expression cellular homeostasis makes reference to the processes by which an organism maintains an internal state of equilibrium.
Cellular homeostasis is fundamental for the survival of the cell and the organism.Cellular homeostasis in this case indicates the mechanism to maintain concentration and gradients used by the plant to carry out metabolic functions.In conclusion, the response helps the plant maintain homeostasis by regulating water levels that plants lose during transpiration.
Learn more in:
https://brainly.com/question/790540
Please answer my question who loves Paddington Bear
Answer:I love paddington bear
Explanation:
competition between species can be a limiting factor in an ecosystem
True
False
Answer:
True
Explanation:
because it can be a limiting factor in an ecosystem
Do you think their ideas are enough to describe who a human person is? do you think there are other ways to describe the human person?
Answer: yes
Explanation: a person has a meaning, a meaning to live a reason
(please help ASAP!) Which statement about evolution is accurate?(1 point)
a. DNA is the only extant evidence supporting the theory of evolution.
b. Animals, plants, and microbes have their own separate, unrelated ancestries.
c. Living things have adapted and changed over time for specific, discoverable reasons.
d. Scientists no longer study evolution because it has been proven.
Answer:
C: Living things have adapted and changed over time for specific discoverable reasons.
Explanation:
Answer:
C. Living things have adapted and changed over time for specific, discoverable reasons.
Explanation:
Survival of the fittestIt is undefined law of the nature that one has to change and adapt to its environment in order to survive. Humans are the prime examples of the process as with time we have directed our actions to run parallel with the changing environment and things around us in order to survive.
Learn more about Survival of the fittest here
https://brainly.com/question/1744168
#SPJ2
If you push something out of someone’s hands, which law of motion is it?
Answer:
an applied force.
Explanation:
the membrane activity most nearly opposite to exocytosis is:
Answer:
endocytosis
Explanation:
Endocytosis is defined as the process of trapping a particle or even a substance from the external environment by the process of engulfing it. The flexibility of the cell membrane helps the cell to engulf the food and also other materials from the external environment. Such a process is called endocytosis whereas exocytosis is the fusion of secretory vesicles with the plasma membrane and results in the discharge of vesicle content into the extracellular space
If the DNA sequence is ATC-CGA, what is the complementary mRNA nucleotide sequence?
A
TAU-UAT
B
UAG-GCU
C
TAG-GCT
D
GCG-CGT
ASAPP
According to the information on the periodic table, which of the following could represent element X?
A. Aluminum (Al)
B. Sodium (Na)
C. Chlorine (Cl)
D. Nitrogen (N)
chlorine because it has 7 electrons on the outer shell
explain how the information in this diagram indicates that an oxygen atom could bond covalently to two hydrogen atoms to form water
Answer:
because when oxygen atom bonds with two hydrogen atoms they form water
Explanation:
A water molecule is formed by covalent bonds between an oxygen atom and two hydrogen atoms. The bond between hydrogen and oxygen involves unequal sharing of electron – it is a polar covalent bond. This is because the nucleus of the oxygen atom is more attractive to electrons than the nuclei of the hydrogen atom.
Put the following in correct order for endochondral ossification.
a. Mesenchymal cells of the embryo develop into cartilage-producing cells
b. The periosteum (formerly perichondrium) begins to produce a thin layer of compact bone
c. A hyaline cartilage model of the future bone is formed.
d. Cartilage is the midregion of the model becomes calcified.
e. Spongy bone tissue develops at the primary ossification center.
f. Secondary ossification centers produce spongy bone tissue of the epiphyses.
g. Medullary cavity is formed.
notice or perceive
e. Observe:
f. Infer:
g. Repetition:
h. Replication:
i. Data
Answer:
Try e. Observe for an answer
What protein facilitates transmission of nerve signals between neurons?
a. neurotransmitters
b. interneurons
c. axons
d. myelin