Why are pollen grains useful when studying the climate history of a region?
Answer: D on edge
Explanation:
They provide clues about the types of plants that grew in a region at a particular time.
Pls help question is in picture
Answer:
im pretty sure its d
Explanation:
jsbsjhs
Eukaryotes contain _______________________
A. membrane-bound organelles.
B. toxins.
C. cell lipozyroids
Answer:
A. membrane-bound organelles.
Explanation:
Answer:
A is your answer
Explanation:
Ok, do we live in or on earth?
Answer:
On, we live on the surface of Earth.
If we lived in it, we'd be near the core, or literally inside the earth's many layers.
Hope that helps! :)
-Aphrodite
Explanation:
how many types of enzyme does pancreas secrete and name them
━━━━━━━━━━━━━━━━━━━━━━━
CORRECT QUESTION -How many types of enzyme does pancreas secrete and name them!
CORRECT SOLUTION -The pancreas consist of exocrine glands that produces enzymes making digestion playing an important role . The enzymes made by the pancreas include :
Pancreatic proteases (such as trypsin and chymotrypsin) - which help to digest proteins .Pancreatic amylase - which helps to digest sugars (carbohydrates) .Pancreatic lipase - which helps to digest fat .━━━━━━━━━━━━━━━━━━━━━━━
Why is the question what is an plane so difficult to answer
Answer:
Look below - A plane is math related.
Explanation:
a flat surface on which a straight line joining any two points on it would wholly lie.
"the horizontal plane"
synonyms:
flat surface · level surface · the flat · horizontal
Hope this Helps!
Answer:
I Don't Know what your asking but if your trying to figure out what a plane is this might help
1. a flat surface on which a straight line joining any two points on it would wholly lie.
2. a level of existence, thought, or development.
3. completely level or flat.
4. (of a bird or an airborne object) soar without moving the wings; glide.
Also I don't know why this would be biology related.
Q.2. Describe the different phases of meiotic prophase – I. Mention the chromosomal events during each stage.
Prophase-I occurs over a long duration and involves several complicated changes in meiotic cell division. It is important because genetic recombineiion and variation in sexually reproducing organism occurs due to the events of this phase.
EXPLANATION:❈ Leptotene —
➥ The chromatin network opens out and threads become clear.
➥ The chromosomes are thin, slender and long.
➥ Chromosome number is diploid.
❈ Zygotene —
➥ Corresponding chromosomes become intimately associated.
➥ The process of pairing is known as synapse. It is so exact that pairing is not merely between corresponding chromosomes but between corresponding individual units.
➥ The chromosomes become shorter and thicker.
❈ Pachytene or Pachynema —
➥ The synaptic chromosomes become very intimately associated.
➥ The pair of chromosomes becomes short and thick.
➥ Crossing over occurs at this stage. Chiasmata are clearly seen.
❈ Diplotene —
➥ Homologous chromosomes start separating from one another.
➥ Chiasmata tend to slip out of the chromosomes. This is known as terminalisation of chiasmata.
➥ Chromosomes start separating out but the separation is not complete.
➥ Nuclear membrane and nucleolus start disappearing.
❈ Diakinesis —
➥ The bivalents condense further and get randomly distributed.
➥ The separation of paired chromosomes is almost complete.
➥ Terminalisation of chiasmata is almost complete.
➥ Nuclear membrane and nucleolus disappear.
Look at the graph...What is the optimal temperature for this enzyme?
A. 60 degrees C
B. 45 degrees C
C. 15 degrees C
D. 35 degrees C
Answer:
B: 45 degrees C
Explanation:
However, above 40-45 degrees Celsius, enzymes are usually denatured and can no longer catalyse the reaction, because the hydrogen bonds are broken, so the enzyme permanently loses its shape. The temperature at which the reaction rate is fastest is the optimum temperature.
As per the graph, the optimum temperature for the enzyme is 45 degree Celsius. The correct option is C.
What is optimum temperature?The temperature at which the enzyme exhibits the greatest activity is referred to as the optimum temperature.
Enzyme activity decreases as the temperature rises or falls. It can even become inactive at times. It is equivalent to the body temperature of a warm-blooded animal.
The kinetic energy in the substrate and enzyme molecules is optimal for the maximum number of collisions at the optimal temperature.
At high temperatures, the enzyme's shape changes, and it no longer complements its specific substrate.
It is the temperature at which the enzyme's reaction rate is fastest. It will be the point on the graph where the line reaches a peak at 45 degrees Celsius.
Thus, the correct option is C.
For more details regarding optimum temperature, visit:
https://brainly.com/question/13122916
#SPJ2
PLEASE HELP!!!! You discover a new protist species. It has chloro-
plasts and vacuoles and moves using a flagellum.
How would you classify the way that it gets energy?
Is it an autotroph, heterotroph, or both? Explain
your answer.
Answer:
Autotroph
Explanation:
An autotrophic organism is any organism that is capable of synthesizing its own food either by using sunlight (photosynthesis) as an energy source or chemicals (chemosynthesis). An organism capable of photosynthesis must possess CHLOROPLAST (CHLOROPHYLL), which is responsible for capturing sunlight in the cell and also harbors the photosynthetic process.
According to this question, a newly discovered protist is said to have chloroplasts and vacuoles and moves using a flagellum. Due to the fact that this protist possess CHLOROPLAST organelle, it means it can perform photosynthesis, which is one of the ways an autotrophic organism synthesizes it's food. Hence, the organism is AUTOTROPHIC.
PLEASE HELP ASAP
Which of the following best explains why animals that inhabit warmer regions tend to have smaller body sizes?
A higher surface-area-to-volume ratio facilitates heat loss.
Animals in warmer climates need to move more quickly to catch prey.
More species inhabit warm climates, and smaller size enables a greater number to live in the same ecosystem.
Smaller body size enables faster reproduction and repopulation to maintain a niche in overpopulated warmer climates.
Answer:
I believe it may be a higher surface area to volume ratio facilitates heat loss
Explanation:
Out of the options it makes the most sense being that larger animals keep heat in...
In what ways do scientists measure biodiversity? Choose all correct answers
The allele for a recessive trait is usually represented by a capital letter
True or false
When sea ice melts, the liquid sinks and begins to move along the ocean floor. What is formed by this process?
Answer:
`
Explanation:
What evidence is there that the 15 species of finch all evolved from one common ancestor?
All of them evolved from one rooted species, which colonized the islands only a few million years ago. This process, whereby species evolve rapidly to exploit empty eco-space, is known as adaptive radiation.
What is evidence of common ancestry and how do they explain evolution?Homologous structures provide proof for a common origin, while analogous structures show that similar selective pressures can produce similar adaptations. Alikenesses and differences among biological molecules can be used to determine species' relatedness.
Thus, adaptive radiation is one of the reasons.
To learn more about adaptive radiation click here:
https://brainly.com/question/1349313
Which type of allele combination is the fish fin length
Codominant alleles
Dominant and recessive alleles or a combination of both Codominant and Dominant and recessive please help I will give brainliest
Answer:
Dominant and recessive genes
Explanation:
There is mutation of dominant genes
Both naturally acquired and artificially acquired immunity are effective ways to gain immunity. Which method is safest?
Answer:
naturally acquired immunity are effective ways to gain immunity.
Explanation:
there is a saying that eat your food like a medicine otherwise you will neex to ead your medicine as food.so food whuch we obtain from nature have many nutritious values than artificially acquired medicine
What type of reproduction involves forming offspring from two
parents?
a Asexual
b Sexual
C Mitosis
int?
d Replication
Answer:
Sexual
Explanation:
Sexual reproduction involves two parents and produces offspring that are genetically unique. During sexual reproduction, two haploid gametes join in the process of fertilization to produce a diploid zygote. Meiosis is the type of cell division that produces gametes.
Hope it helps
Answer: Sexual, I believe.
Explanation:
If it were Asexual, it'd only involve one parent. Mitosis has daughter cells have the same number of chromosomes as parent cells (heavy emphasis on cells as in plural cells.) And replication is just copying a cell.
Forgive me if I'm wrong!
Why do you think it would be important to know that both sides of the heart receive blood at the same time? Giving Brainliest
Explanation:
The right side of your heart receives blood from the body and pumps it to the lungs. The left side of the heart does the exact opposite: It receives blood from the lungs and pumps it out to the body. If your body didn't do it simultaneously, then blood would overflow your lungs.
What is the vent in earths surface through which magma and gases are expelled
Answer:
A volcano
Explanation:
Is a vent or fissure in the Earth's surface through which molten rock and gases are expelled. Molten rock is called magma.
sifat sifat fizik air
Answer:
Explanation:
cair
padat
gas
Which statement BEST describes the moon’s position in 14 days and why?
Answer:
I am pretty sure it is B
Explanation:
I think it is position B, a 3rd Quarter moon, because the moon revolves around Earth about once every 7 days.
Answer:is b
Explanation: i got a 100% on this test
Why are organisms that reproduce sexually less likely to accumulate deleterious mutations ?
What happens to the body when blood sugar level decrease than the normal level?
Answer:
Hello There!!
Explanation:
You can get variety of problems and issues from you're nervous system which includes headaches,weakness,fatigue and dizziness and many more.
hope this helps,have a great day!!
~Pinky~
PLEASE HELP ASAP I'M BEING TIMED!!!!!!!!!!!!!!!!!!!!!!!!! HELP ME RIGHT NOW, PLEASE!!!!!!!!!!!!!!
What is the function of the type of muscle that is pictured below?
A) support and movement of the skeleton
B) movement of food through the digestive system
C) contraction and relaxation of the heart
D) generation and conduction of electrical signals
Answer:
it's a okkkkkk
a
its aaaa
Answer:
I believe it is C.contraction and relaxation of the heart
Explanation:
Biologically speaking what is the only purpose of reproduction
Answer: To prevent extinction
Explanation: This is to say the main purpose of reproduction is for the continuation of species.
A student makes a model of an atom, as shown. Where should the student place a proton in the model?
A. Inside the nucleus
B. On either of the two orbits
C. Between the two orbits
D. Between the first orbit and the nucleus
When you are writing scientific names, you underline the entire scientific name, capitalize the first word, and write the second word using lowercase. true or false
Explain.
Genetic mutations introduce new gene forms in a population. For instance, the mutation that affects
hemoglobin alters the shape of the red blood cell and makes it sickle-shaped. Which statement
below would explain why the sickle-cell mutation has spread through the gene pool?
A. There is a selective advantage to having Sickle Cell Anemia.
B. This kind of mutation demonstrates a common ancestor.
C. The sickle cell mutation has no benefit.
D. Sickle cell anemia increases the risk of death.
Answer:
B- this kind of mutation demonstrates a common ancestor.
Explanation:
in order to have sickle cell anemia you need to have both recessive alleles from both parents, this recessive allele has to be continuous passed down from generation to generation on both sides, which shows a common ancestor from long ago
Why cells divide and what happens to genetic material during cell division.
Which two viral characteristics provide evidence to support the
argument that viruses are more similar to living components than to
nonliving components of an ecosystem?
Living Characteristics of Viruses Nonliving Characteristics of Viruses They reproduce at a fantastic rate but only in living host cells. They can mutate. They are acellular that is they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery.