Answer:
a defect in a cell-cycle checkpoint prevents a cell from entering the S phase
Explanation:
The bubbles used to measure the rate of photosynthesis in pondweed are full of which
gas?
Answer:
Oxygen
Explanation:
in the diagram below that corresponds with the most likely pH of acid rain.
A. pH4
B. 5.6
C. 10
Answer:
Answer is A its 4.0 or just 4
Explanation:
What is a reflex?
Question 3 options:
Similar nerve cells grouped together in a nervous system.
A focused, conscious decision to send a signal to a body part.
Part of the nervous system that connects the sensory receptors to the muscles.
Behavior that does not involve the forebrain, or "higher" centers of an animal's brain.
Answer:
B
Explanation:
i took the test lollll
What can two igneous rocks have the same minerals but different names?
Answer:
Because the sizes of their crystals will be completely different.
Explanation:
Select the correct answer from each drop-down menu.
Choose the correct terms to complete this paragraph describing how a generator works.
A generator is based on the principle of
In a generator, a magnet is moved near a coil of wire.
The magnet's
also moves. This motion creates
Electrons flow through
the coil of wire as a result. One way to increase the flow of electrons is to move the
faster.
al
Submit
Answer:
electromagnatism
magnetic field
an electric field
magnet
Explanation:
Answer on Edmentum
Give three reasons why plants lack complex excretory system
Answer:
The gaseous wastes are lost by diffusion through the stomata
Some of the wastes are utilised e.g. oxygen is used for respiration and carbon dioxide for photosynthesis.
Biology: Define growth
Answer:
growth, the increases in cell size and number that take place during the life history of an organism.
Hope this helps :)
living things are made up of cells
support the statement with evidences
Answer:
True
Explanation:
1 - All living cells do indeed divide through mitosis, meiosis, or binary fission. Look at how we’re created through our cells merging in meiosis, how our skin cells replicate and divide in mitosis, and how bacteria replicates in binary fission. However, we question this by asking where the first cells came from (if you aren’t religious, at least).
2 - All living things are made up of at least one cell, the smallest ones being prokaryotes.
3 - A cell does hold all the functions of life on its own, as we define the functions of life through MRHGREN (metabolism, respiration, homeostasis, growth, reproduction, excretion, and nutrition). However, we can question this by looking at viruses as they are smaller, yet are not considered living as they need to have a host cell in ordered to perform the functions.
Yes, living things are made up of cells.
Evidence to support the statement:Living organisms are made up of cells. Cells are the structural and useful units of all living organisms. In 1665, Robert Hooke determined the lifestyles of cells through the use of the microscope, which in addition paved the way for the invention of various different microscopic organisms.
Why cells are called cells?
A cell is the simple unit of lifestyle as we know it. it is the smallest unit able to the impartial replica. Robert Hooke counseled the name 'cell' in 1665, from the Latin cella that means storeroom or chamber, after using a very early microscope to observe a piece of cork.
Learn more about cells here: https://brainly.com/question/13123319
#SPJ2
NEED HELP PLS, WILL GIVE BRAINLIEST
What occurs during the coagulation phase of the blood-clotting reaction? (2 points)
Platelets aggregate at the wound site, and the fibrin mesh forms.
Blood vessels near the wound site constrict to reduce blood loss.
Endothelial cells divide to regenerate the walls of the blood vessel.
White blood cells aggregate at the wound site to reduce infection.
Answer:
Blood vessels constrict should be correct.
1. Discuss the ecosystem metaphor. Why have we used cars rather than counting actual species in a real
ecosystem? How do the cars in the parking lot represent species in an ecological community?
Answer: because its a known place
Explanation: its a known place in the world
What is/are true about viruses?
a. Viruses have ribosomes to synthesize proteins.
b. The genetic information of a virus can be in the form of RNA or DNA.
c. Viruses are smaller than Bacteria and Archaea.
d. Viruses use facilitated transport to take in nutrients.
e. Viruses are unable to perform replication on their own.
f. Viruses generate energy through mitochondria.
g. Viruses are as old as Bacteria and Archaea.
h. Viruses do not belong to any of the three domains: Bacteria, Archaea, and Eukarya.
i. Viruses cannot replicate on their own.
Answer:
the genetic information of the virus comes from DNA and rna
PLEASE HELP!! DUE TOMORROW!! WILL MARK AS BRAINLIEST!!
1. Why ATP is an expendable molecule of energy?
2. Write the initial components, end product, where phosphorylation happens. Are there enzymes in the steps? Mention at least two enzymes.
Answer:
1. The reason there is energy released in the process is because the products formed (ADP and hydrogenphosphate/phosphate) have stronger covalent bonds (plus intermolecular forces with the surrounding solution and dissolved ions) than the starting materials.
2. The end product of oxidative phosphorylation is ATP and water. ATP synthesis is coupled with the transfer of electrons to O2, which combines with protons to form water. Phosphorylation is the chemical addition of a phosphoryl group (PO3-) to an organic molecule. The removal of a phosphoryl group is called dephosphorylation. Both phosphorylation and dephosphorylation are carried out by enzymes (there are enzymes involved). kinases and phosphatases, From the family of Enzymes.
Which statement regarding food is false?
a. Food provides the raw materials for biosynthetic pathways that make molecules for cellular repair and growth.
b. Food provides the raw materials for biosynthetic pathways that can produce molecules that are not actually present in the original food.
c. Food provides the raw materials for biosynthetic pathways that can produce sugar by a process that is the exact opposite of glycolysis.
d. Food provides the raw materials for biosynthetic pathways that consume ATP.
Answer: C. Food provides the raw materials for biosynthetic pathways that can produce sugar by a process that is the exact opposite of glycolysis.
Explanation:
How does a nerve signal travel?
Question 5 options:
Molecules signaling through gap junctions.
Molecules signaling through plasmodesmata.
An electrical signal traveling as a wave.
Pheromone signal traveling between organisms.
Answer:
Molecules signaling through gap junctions.
Explanation:
i could be wrong
Answer:
electrical signal traveling as a wave
Explanation:
this is the correct answer
What is different between your own kidney and a donated kidney?
Answer:
your kidney is worth more beacuease its a living kidney unlike a donated kidney which is a sick kidney or robotic.
Which plate forms a boundary with the African Plate?
Answer:
The plate which forms a boundary of the African plate is Antarctic Eurasian and South American. According to various scientific research and evidences, the world is divided into seven techtonic plates out of which the African plate is the largest plate.
Which of these is true for mitosis?
A) It results in four daughter cells.
B) Resulting daughter cells are hanloid in nature
C) It has five phases
D) Each daughter cell has 46 chromosomes
Answer:
A) It results in four daughter cells
C) It has five phases
D) Each daughter cell has 46 chromosomes
Explanation:
Value-neutral autonomy is appealing as an ideal concept of autonomy. But if we consider this to be the ideal, then:____________
a. we can be sure that we are autonomous, self-determining agents.
b. we risk not being able to identify one value as any better or worse than any other.
c. we know with certainty that all of our values will be forced upon us by the incumbent political leaders.
d. values can never possibly be conceived of as being arbitrary.
Answer: A. We can be sure that we are autonomous, self-determining agents.
Explanation:
What is an invasive species?
Answer:
An invasive species is an organism that causes ecological or economic harm in a new environment where it is not native.
Explanation:
Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
Invasive species are capable of causing extinctions of native plants and animals, reducing biodiversity, competing with native organisms for limited resources, and altering habitats. This can result in huge economic impacts and fundamental disruptions of coastal and Great Lakes ecosystems.
the large muscle of the arm is
A. Bicep
B. Tricep
C. Tetracep
D. Pentacep
Answer:
A
Explanation:
deltoids (shoulders) contain the largest muscle on the upper body and second is the triceps.
How are the bases in DNA and RNA different?
A) DNA has the base cytosine, and RNA has adenine.
B) DNA has the base thymine, and RNA has uracil.
C) DNA has the base uracil, and RNA has thymine.
D) DNA has the base guanine, and RNA has thymine.
Answer:
DNA has the base thymine, and RNA has uracil
Explanation:
DNA and RNA differ in their bases such that the thymine base in DNA is replaced with uracil in RNA.
Differences between DNA and RNAThe DNA and RNA differ in several ways:
RNA is single-stranded while DNA is double-strandedDNA contains cytosine, guanine, adenine, and thymine bases. Thymine is replaced with uracil in RNA.DNA occurs mostly in the nucleus of eukaryotic organisms. RNA is synthesized in the nucleus but transported to the cytoplasm.More on DNA and RNA can be found here: https://brainly.com/question/14771379
#SPJ2
Which of the following is TRUE about theories and laws?
What is the difference between habituation from a neural perspective?
The difference between habituation from a neural perspective is that habituation refers to the fading of the response over the course of monotonous stimulation, and sensitization refers to processes of increased response.
What is the habituation process?Habituation is an example of non-associative learning in which there is an automatic decrease in the intensity of a response to a repetitive, weak stimulus, without serious consequences, which allows, for example, ignoring stimuli such as noise, the ticking of a clock, etc.
With this information, we can conclude that the difference between habituation from a neural perspective is that habituation refers to the fading of the response over the course of monotonous stimulation, and sensitization refers to processes of increased response.
Learn more about health in brainly.com/question/13179079
Which part of a plant begins the reproductive process to allow the plant to spread and grow new plants? (1 point)
O stems
O leaves
O flowers
O Roots
Answer:
The answer would be the flowers
Explanation:
The flowers have pollen in or on them that bees, wasps, and butterflies pick up while drinking nectar. The pollen is eggs and is spread from flower to flower.
Flowers is a part of plant to begins the reproductive process to allow the plant to spread and grow new plants.
What is flower?Pollination, the act of sexual reproduction in flowering plants, is how it happens. Stamens, the male sex organ, and pistils, the female sex organ, are found in flowers.
The portion of the stamen that carries pollen is called the anther. The male gametes are found in pollen. For reproduction to occur, pollen must be transferred to the stigma, a region of the pistil.
When a plant's own pollen nourishes its own ovules, self-pollination occurs. When animals or the wind carry pollen from one plant to another, cross-pollination occurs.
Cross-pollination has the benefit of preserving a species' genetic diversity. When environmental conditions change and organisms must adapt, genetic variety is useful. Some plant characteristics really work to stop self-pollination.
Therefore, Flowers is a part of plant to begins the reproductive process to allow the plant to spread and grow new plants.
To learn more about flowers, refer to the link:
https://brainly.com/question/24261569
#SPJ2
How can oxygen indirectly affect other species in the food chain
Answer:
when anamial eats a plant it gains the oxygen from the plant and it can be transformed into energy
Explanation:
Have a good day please mark as branliest
What is the point of DNA replication
Answer:
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell
Explanation:
DNA replication is the biological process in which two identical copies of DNA are produced from one original DNA molecule.
The steps involved in the process of DNA replication are as follows:
The first step in DNA replication is to ‘unzip’ the double-helix structure of the DNA molecule.
This is carried out by an enzyme called helicase which breaks the hydrogen bonds holding the complementary bases of DNA together (A with T, C with G).
The separation of the two single strands of DNA creates a ‘Y’ shape called a replication ‘fork’. The two separated strands will act as templates for making the new strands of DNA.
One of the strands is oriented in the 3’ to 5’ direction (towards the replication fork), this is the leading strand. The other strand is oriented in the 5’ to 3’ direction (away from the replication fork), this is the lagging strand. As a result of their different orientations, the two strands are replicated differently.
A short piece of RNA called a primer (produced by an enzyme called primase) comes along and binds to the end of the leading strand. The primer acts as the starting point for DNA synthesis. DNA polymerase binds to the leading strand and then ‘walks’ along it, adding new complementary nucleotide bases (A, C, G and T) to the strand of DNA in the 5’ to 3’ direction. This replication is continuous. Numerous RNA primers are made by the primase enzyme and bind at various points along the lagging strand.
Chunks of DNA, called Okazaki fragments, are then added to the lagging strand also in the 5’ to 3’ direction. This type of replication is called discontinuous as the Okazaki fragments are joined up later.
Once all of the bases are matched (A with T, C with G) an enzyme called exonuclease strips away the primer(s).
The new strand is proofread to make sure there are no mistakes in the new DNA sequence.
Finally, an enzyme called DNA ligase seals up the sequence of DNA into two continuous double strands.
The result of DNA replication is two DNA molecules consisting of one new and one old chain of nucleotides. This is why DNA replication is described as semi-conservative, half of the chain is part of the original DNA molecule, half is brand new.
Following replication, the new DNA automatically winds up into a double helix
(b) DNA replication occurs in S phase of cell cycle in eukaryotes. If cell division is not followed after DNA replication then the replicated chromosomes (DNA) would not be distributed to daughter nuclei. A repeated replication of DNA without any cell division results in the accumulation of DNA inside the cell nucleus, leading to polyploidy.
Hydra is a multicellular animal why give reason
Explanation:
Hydra is a multicellular organism. They have a tubular body and have different sizes. They belong to Animalia kingdom and some species of hydras even indulge in relationships with unicellular algaes.
Just help pls 15points!!!
Answer:
I know some
Explanation:
1. supermoon
2. eclipse
6. waxing
16. waning
5. quarter
please help you guys !! Wildlife Management: Waterfowl
Answer:y 232
Explanation:
what are similarity and difference between spontaneous generation and cell division theory?
Answer:
They both involve cell and reproduction