Answer:
D. It is selectively permeable, so it can allow certain materials to pass through it and prevent others from passing into the cell.
Explanation:
organisms that must obtain nuttrients and energry by eation other organisms are
Answer:
consumer or heterotrophic
Explanation:
HAVE A GREAT DAY!!
Kono Dio Da!!!
True or False: Carbon can't get from the deep ocean to soils on the land. There
is a different type of carbon on land
Answer:
False it's the same type of carbon
Explanation:
hope this helps
Information related to the organisms found on Earth during
various geological time periods is represented in the accompanying
chart.
OOEEOC 0-0 C-E
2525
-Edw-
4.6 (?) Billion
600 Million
200 Million
60 Million
Years Ago
Years Ago
Years Ago Years Ago
Precambrian
Paleozoic
Mesozoic Cenozoic
(Simple
(Age of Amphibians, Fishes, (Age of Reptiles) (Age of
Multicellular
and Invertebrates)
Mammals)
a organisms and
First Protists)
Past
Present
Geologic Time
Which statement concerning the first appearance of the organisms
over the time period represented in this chart is most likely
correct?
Answer:
D
Explanation:
True/False: Disease and Invasive Species are two causes of extinction.
Answer:
True
Explanation:
Answer:
True.
Explanation:
Which of the following statements is accurate?
Choose 1 answer:
A Species Y and Species Z can
interbreed.
Species A and Z share a recent common ancestor.
Species A and Species Y are the same.
Species X evolved from Species Y.
Stuck? Watch a video or use a hint.
Reporta problem
Answer: Species A and Species Y are the same
Explanation: Good luck! :D
When 2 heterozygous parents (Rr) are crossed, what are the alleles of the
offspring?
a. 100% Rr
b. 50% RR, 50% Rr
c. 25% RR, 50% Rr, 25% rr
When two heterozygous parents (Rr) are crossed due to dominance effect offspring will be 25% RR, 50% Rr, 25% rr, hence c is correct option.
What is heterozygous parents?Heterozygous condition when parent having both the allele showing different trait of one character and one allele masks the trait of another allele.
When cross of heterozygous parents (Rr) x (Rr).
Gametes are R,r and R,r.
Genotype will be 25% RR, 50% Rr, and 25% rr.
Due to law of dominance, one allele R is dominant over the other allele during crossing over.
Cross of parents in punnet square is attched in image below.
Therefore, both the parents are heterozygous, so offsprings will be having genotype, 25% RR, 50% Rr, 25% rr, hence option c is correct.
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Weebugs get energy storage molecule from eating greenleafs. What change to the greenleaf population could decrease the number of births in the weebug population?
A) increase greenleafs
B) decrease greenleafs
A decrease in green leaves can decrease the number of Weebugs. Hence, option B is correct.
How do green leaves make energy?Green leaves are producers. They contain a pigment named chlorophyll which helps to trap sunlight which is required by the leaves to make food, and this process is called photosynthesis.
Green leaves take carbon-di-oxide, sunlight, and water, and in the presence of chlorophyll, glucose is produced and oxygen is released as a by-product. This process takes place in the chloroplast. There are four steps involved in photosynthesis that is Absorption of light, transfer of electrons, ATP production and carbon fixation,
These leaves are consumed by primary consumers such as Weebugs, and they get energy. A decrease in green leaves can decrease the number of Weebugs. Hence, option B is correct.
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What are the possible outcomes of combining a
lower with green leaves (GG) and green/red leaves
Gg) with a Co-Dominance relationship?
a. 3 Flowers with green leaves and 1 with red leaves
b. 2 Flowers with green leaves and 2 flowers with green/red leaves
c. 2 Flowers with green leaves and two flowers with 2 red leaves
Answer:
im guessing green is dominant
Explanation:
Two green leaves, two green/red leaves
A researcher attempts to use a segment of ribosomal RNA as a molecular clock to calculate the date of the last common ancestor of two species. He finds that the two species diverged from a common ancestor 150 million years ago. These particular species have abundant fossil records that strongly suggest that these species diverged 100 million years ago. Which of the following answer choices best describes a reason for the discrepancy in the date of the last common ancestor of these species?
A. Ribosomal RNA is not a reliable molecular clock and should not be used for dating.
B. The neutral mutation rate used in calculating the last common ancestor date may not have been accurate.
C. It is highly likely that the two organisms did not share a common ancestor, so the results are invalid.
D. A large portion of the ribosomal RNA is not vital to survival, so it is not likely to be well preserved.
Answer:
B
Explanation:
It is B because the mutation rate should not have been accurate if it showes that they diverged 150 million years ago. But the abundant fossil records show that it diverged 100 million years ago.
Hope this helps:)
Ribosomal RNA is not a reliable molecular clock and should not be used for dating.
What is molecular docking?In structural molecular biology and computer-assisted drug design, molecular docking is an important technique. The purpose of ligand-protein docking is to anticipate a ligand's most common binding mode with a protein having a known three-dimensional structure.What is dating? Carbon dating is used to determine the age of ancient material such as an archaeological or paleontological specimen .A molecular clock estimates how long it has been since similar species separated from a common ancestor based on DNA sequences (or the amino acid sequence of proteins encoded by DNA).
Hence, the correct option is A.
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Carbon is stored in
A.Trees and other living things
B.Oceans
C.Underground in soil and fossil fuels
D.All are correct
Answer:
all are correct
Explanation:
Carbon is also found in the atmosphere where it's a part of carbon dioxide gas emitted when fossil fuels are burned and when living organisms breathe. It's in organic matter in the soil, and it's in rocks. But far and away the most carbon on Earth is stored in a surprising place: the ocean.
Which of the following identifies the most important reason why the percentage of deaths due to infectious diseases dropped from 1970 to 2015?
Group of answer choices
A.The number of people living in poverty fell as nations became increasingly more developed.
B.More people moved into urban areas, and fewer people remained in disease-prone rural areas.
C.More children were immunized against the major infectious diseases.
D. The use of pesticides became increasingly effective at killing biological threats.
Answer:
A
Explanation:
I choose A people in one hand really have to come together and make this world a strong, better, and brighter place.
how is mRNA processed
Answer:
Eukaryotic mRNA precursors are processed by 5′ capping, 3′ cleavage and polyadenylation, and RNA splicing to remove introns before being transported to the cytoplasm
Explanation:
Normal blood cells slide easily through narrow blood vessels. In sickle cell disease many red blood cells change to a crescent shape like a slender moon Crescent-shaped blood cells cause blockages in blood vessels These blockages decrease the transport of oxygen People with sickle cell disease often have sharp pains due to the lack of oxygen in parts of the body Some people have one sickle cell gene and one normal gene They have few defective cells and no symptoms because the sickle cell gene is recessive. How does the method of reproduction in humans result in people getting one copy of a sickle cell gene and one copy normal gene? Describe the process
Answer:
Explanation:
The method of reproduction in humans is sexual reproduction: a type of reproduction that occurs when new organisms are produced through the coming together of genetic information from two individuals of different sexes mostly a male and a female (egg cell and the sperm). The genetic information for making the blood cells; the red blood cells genes in particular exists on chromosomes in the nucleus of the sex cells (egg and sperm cell) also called the gametes. Basically, the DNA provides instructions for the production of mostly all of the body's needs.
The genes coding for the sickle cells which is the abnormal red cell is always inherited in the recessive form meaning both parent has to possess one copy each of the defective gene in their DNA. For humans to get one copy of a sickle cell gene and one copy normal gene; it means one of the parents gametes (be it male or female) contributed the defective chromosome and the other normal gene is contributed by the other parent during copulation giving rise to an individual that is heterozygous for the trait
For example, the sperm cell with the defective gene fertilizes the egg cell that has the normal copy of the gene producing an heterozgous individual.
How long (in centimeters and years) was the Precambrian period to the rest of the scale?
Answer:
Total length of Precambrian period is [tex]6[/tex] meter [tex]45[/tex] centimetres
Explanation:
Precambrian period has two major sub divisions
a) Archean (oldest) and
b) Proterozoic
The length of Precambrian period would be equal to the sum of length of Archaean eon and the Proterozoic eon.
The length of Proterozoic eon [tex]= 240 + 55\\[/tex]
[tex]= 295[/tex]
Or
[tex]2[/tex] meter [tex]95[/tex] centimetres
The length of Archean eon [tex]= 3[/tex] meter [tex]50[/tex] cm
Total length of Precambrian period [tex]= 295 + 350\\[/tex]
[tex]= 645[/tex] centimetres
Or
[tex]6[/tex] meter [tex]45[/tex] centimetres
During meiosis, homologous chromosomes exchange genetic
material. This exchange of genetic material -
Alice is studying biological molecules. She has isolated a molecule and identified the nucleotide bases adenine, cytosine, guanine, and thymine. Which molecule did Alice isolate?
Answer:
DNA
Explanation:
I know this from learning it in school
Which event would most likely lead to the emergence of a new species from an existing species?
A.
part of a population becomes reproductively isolated
O
B.
part of a population is killed by an infectious disease
O
C .
a beneficial trait disappears from a population
D.
a beneficial trait appears in a population
Please help me with this one.
Answer:
Explanation:
just add what you think how to do it.
1pt Which of the following cells would be produced by meiosis?
A. a heart cell
B. an eye cell
C. a sperm cell
D. a skin cell
Answer: c
Explanation:
because meiosis produces our sex cells
This term takes into account both the actual emission of carbon by an act, but also the
carbon used to help create, transport, and dispose of any waste associated with that
act. What is this phrase?
How do automatic stabilizers help counter the ups and downs of the business cycle ?
Selection is:
O picking what you want for supper
O making more babies than will survive
O having an adaptation
O a desirable trait when choosing a mate
Answer:
Making more babies that will survive and having an adaption
Explanation:
As larvae, echinoderms have bilateral symmetry? Yes or no ?
Answer:
no
Explanation:
Which of the following fields is(are) part of the environmental movement?
а. scientific
b. social
C.political
d. all of the above
Scientific, social, and political all are the fields are part of the environmental movement. Thus, the correct option is D.
What is the Environmental movement?Environmental movement was a social, political, and the scientific movement for addressing environmental issues. This movement includes conservation and the green politics. It is also known as the ecology movement.
Environmental movement includes the sustainable yield of natural resources, the preservation of wilderness areas and also biodiversity. The modern Environmental movement, has began in the time of 1960s with the concern about air and water pollution, became broader in scope to include all landscapes and human activities.
Therefore, the correct option is D.
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Kate says she really wants to listen to your problem, but she is paying more attention
to her homework. This is an example of a mixed message.
True
False
Answer:
True. Lol.
Explanation:
What can scientists infer about the period of very early Earth from the fossilized remains of trees found under a lake?
Answer:There is a theory that terrestrial plants evolved from aquatic plants through a process of natural selection. Thus, by finding fossils of plants under the river, scientists may conclude that this theory is correct and that these fossils represent the ancestors of terrestrial plants.
The emergence of plants that survive on earth is a very important milestone for the planet, it is believed that these plants have evolved from green algae called Chlorophyta that have survived in marshy areas that had alternating periods of flooding and drought.Then the discovery of these fossils, through scientific experiments may conclude that the theory is correct
Explanation:
Answer:
The fossil record is the record of life on earth preserved in rock as fossils. The fossil record provides evidence of where types of plants and animals lived, how long they lived, how they died, and how they changed. It also tells us about Earth’s early environment and how it changed. The fossil record helps determine the age of rock formations by looking at how deep the fossils are buried in the rock. When a fossil is found above another fossil in a rock formation, the deeper fossil are considered older.
What can scientists infer about the period of very early Earth from the fossilized remains of trees found under a lake?
Explanation:
A) The fish ate the trees.X
B) The dinosaurs ate trees.X
C) The area was once a forest. ****************************** C
D) The atmosphere lacked oxygen.X
Using the drop-down menus, match the definitions below with the appropriate terms. All of the living and non-living things in a particular area: The total variety of organisms that live in the biosphere: A group of organisms that breed and produce offspring that can breed: All of the living things in a particular area:
Answer:
All of the living and non-living things in a particular area: environment
The total variety of organisms that live in the biosphere: biological diversity
A group of organisms that breed and produce offspring that can breed: species
All of the living things in a particular area: biotic factor
Explanation:
Environment is defined as the sum total of all living and non-living factors in a particular area. When they interact together as a unit, it is referred to as ecosystem.
Biological diversity refers to the total variety of living organisms that live in the biosphere.
Species refers to a an assemblage of similar organisms that are capable of breeding together to produce fertile offspring.
The biotic factor of an area refers to the living things/component of that area.
Answer:
Using the drop-down menus, match the definitions below with the appropriate terms.
All of the living and non-living things in a particular area:
✔ ecosystem
The total variety of organisms that live in the biosphere:
✔ biodiversity
A group of organisms that breed and produce offspring that can breed:
✔ species
All of the living things in a particular area:
✔ community
Explanation:
Which plant or plant part is a source of edible oils?
A.
wheat
B.
kidney beans
C.
sunflower
D.
rice
E.
cottonseed
Answer:
kidney beans is correct
Explanation:
why do lichens and mosses get mostly replaced by larger plant species during succession
Answer:
Lichens that colonize bare rock secrete acids that break down the rock and start the soil-production process. Also, as lichens die, they provide some organic matter that also contributes to soil. Mosses can then colonize the thin soil; as mosses die, the soil thickens more allowing other hardy species to colonize
Explanation:
A mother has one allele for dimples and one allele for no dimples. How many
of her gametes will carry the allele for dimples?
A. 0%
B. 25%
C. 100%
D. 50%
Answer:
50%, i believe
Explanation:
So the mother in the problem must have gotten her alleles from her mother and father. Who donated what we are not sure. All we know is that she got one allele for dimples and one allele for no dimples. These are part of the mother's somatic cell DNA. This DNA is duplicated during interphase, right before meiosis occurs as the mother begins to form her gametes, however.
