Answer:
Lactose tolerance conferred an evolutionary advantage, thereby this beneficial mutation increased its frequency in the population
Explanation:
Originally, adults were unable to digest lactose. But approximately 8,000-10,000 years ago something remarkable happened: a mutation near the gene that produces the lactase enzyme appeared in a raising cattle population from Europe-Middle East, making adults able to digest lactose. Nowadays, many adults from different societies are tolerant to digest lactose because this mutation increased its frequency and extended to different populations. It is a classical example of how a beneficial mutation may eventually become the most common gene variant by increasing its frequency in the population, and, subsequently extending to other populations. It is possible to hypothesize that new mutations associated with human activities may appear in current human societies, thereby conferring an evolutionary advantage in the same way that lactose tolerance in cattle-raising people. For example, nowadays, mutations in human behavior-associated genes might confer beneficial social skills (thereby increasing the frequencies across time or across populations).
Different species of heterotrophic unicellular organisms such as amoeba and Actinobacteria are found in freshwater sources. The feature that distinguishes amoeba from Actinobacteria is the —
a) presence of ribosome
b) ability to maintain homeostasis.
c) ability to reproduce.
d) presence of a nuclear membrane.
Answer:
A
Explanation:
Answer:
B
Explanation:
What is found in a eukaryotic cell but not in a prokaryotic cell?
Answer:
Hey!
Your answer is a NUCLEUS
Explanation:
Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. You could also say that they also lack MITOCHONDRIA, CHLOROPLASTS and VACUOLES (these are other possible options!)
I HOPE THIS HELPED YOU!Things eukaryotes have and prokaryotes don't are:-
A true nucleus.Membrane bound organelles.What are prokaryotes ?
Prokaryotes are organisms whose cells lack a nucleus and other organelles.
Prokaryotes are divided into two distinct groups:
The bacteria and the Archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.To know more about eukaryotes here
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Dwayne is making a cladogram using a diagonal line.
Where should he place the least primitive organism?
E
A
B
D
PLEASE HURRY I REALLY NEED HELP BEFORE MY TEST!!!
Answer:
the answer is e on the test
hope this helps
Dwayne is making a cladogram using a diagonal line. He should place the least primitive organism in E. The correct option is A.
What is a cladogram?Diagrams are called cladograms to show the relationships between various taxonomic groups known as "clades." Cladograms reconstruct the taxa's evolutionary history (phylogeny) by showing these relationships. Phylogeny and trees are other names for cladograms.
Using the term "cladogram" emphasizes to some biologists that the diagram represents a hypothesis about the true evolutionary history of a group, whereas "phylogenies" represent true evolutionary history.
A cladogram's root, clades, and nodes are its most important components. The root is the first ancestor shared by all groups that branched off from it.
Therefore, the correct option is A, E.
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What's an invasive species?
A. A native species that begins to displace other local species
B. A species that invades an area because it has run out of space in the neighboring area
C. A species that's naturally expanding its range
D. A species that's introduced to a place where it's not native and then becomes widespread and competes with local species for the available resources
I believe the answer would be D
Pyrite breaks down rocks in which of the following processes? A. Deposition/ B chemical weathering/ C. Erosion/ D. Physical weathering?
Answer:
I think physical weathering
Explanation:
Answer:chemical weathering
Explanation:
Which of these describes a difference between viruses and cells?
Answer:
Cells reproduce independently, and viruses require a host cell to reproduce.
Explanation:
Viruses cannot reproduce themselves and require help from a host cell while cells can reproduce independently.
how do endangered animals affect the earth?
Answer:
Explanation:
When a species becomes endangered, it is a sign that the ecosystem is slowly falling apart. Each species that is lost triggers the loss of other species within its ecosystem. Humans depend on healthy ecosystems to purify our environment.Which action is designed to increase the safety of a person carrying a microscope from one place to another?
Answer:
wrapping the electrical cord around the arm of the microscope
Explanation:
What types of gases do you find in the atmosphere?
Answer:
Nitrogen — 78 percent
Oxygen — 21 percent
Argon — 0.93 percent
Carbon dioxide — 0.04 percent
Trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor
Explain how the fungus affects the role of both xylem and phloem
Answer:
A fungus role is to break down dead or decaying organisms in the environment, the fungus may try to steal its nutrients and affect the specific roles that xylem and phloem operates.
Explanation:
Idk what to ask bruh?
Answer:
._. Bruh
Explanation:
Answer:
b.r.u.h
Explanation:
oof
a. a lipid molecule
b. an indicator
c. an ADP molecule
d. an enzyme
Answer:
D. .................................
without oxygen what will brain cells do
Answer:
They will die.
Explanation:
Without oxygen, the brain's cells cannot metabolize glucose, and therefore cannot convert glucose into energy. When your brain is deprived of oxygen, then, the ultimate cause of brain death is inadequate energy to power the brain's cells.
Answer:
Brain cells are destroyed after 4 to 6 minutes without oxygen
Explanation:
identify the remaining processes and componets of the carbon cycle
Answer:
Carbon is one of the most vital element for the existence of life. The carbon cycle is the one in which the carbon is transferred from the atmosphere to the living organisms i.e both plants, animals and to the earth and again back into the atmosphere, thereby maintaining a cyclicity.
Explanation:
What are the adaptations that Embryophytes have for life on land?
Answer:
Explanation:
"Plants have evolved several adaptations to life on land, including embryo retention, a cuticle, stomata, and vascular tissue."
do ghosts exist? testable or not testable
Answer:
Not testable
Explanation:
There's really no way you can prove that with a scientific experiement.
Answer:
Not testable
Explanation:
Every scientific question must be testable. There are no scientific tools that can prove ghosts exist. Instead, this question is based on beliefs, opinions, and in some cases - religion. Thus, this is not a testable question, which means it is not scientific either.
Do you think that in the human species, there are psychological traits such as empathy, aggression, intellect, imagination, etc. are more common characteristics of one sex rather than another?
Answer:
each sex has these traits, but with some, like aggression, I feel can be more "biased", so to speak, to the male sex
Explanation:
In the Hierarchy of life there are seven levels, what are they?
Answer:
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:
Which of the following elements is required for growth and development and is in our DNA? *
hydrogen
carbon
oxygen
nitrogen
phosphorus
why it is better to use a broad-spectrum sunscreen
Answer:
broad-spectrum sunscreen protects you from both. UVA rays can prematurely age your skin, causing wrinkling and age spots. UVB rays can burn your skin. Too much exposure to UVA or UVB rays can cause skin cancer.
(pls pls pls help!!! kind of using my last points for this!!!!)
Use the internet to research genes and their affects on heredity. How many chromosomes do we inherit from each parent? What are recessive and dominant genes? What are inherited traits? What are acquired traits?
Answer:
23 chromosomes
A dominant gene is a type of gene which dominates in the inheritance pattern and masks the other one, on the other hand, a recessive gene is that which does not show its trait in inheritance pattern and hidden by the dominant one. A dominant gene is stronger gene while the recessive gene is a week gene. Dominant gene is always expressed in the upper case letters like A, F, V whereas recessive gene is always denoted by the lower case letters like a, f and v. dominant gene show in the inheritance when one of the two genes is dominant but in case of recessive gene both the genes of a trait should be recessive.
Traits you get from your parents. Inherited features evolve due to genetic material rearrangement and mutation. The parents transfer those traits (inherited) to their offspring. These aren't dying but passed on to the next generation. Example: earlobe attached or free, and curly hair.
An acquired characteristic is a non-heritable change in a function or structure of a living organism caused after birth by disease, injury, accident, deliberate modification, variation, repeated use, disuse, misuse, or other environmental influence. Acquired traits are synonymous with acquired characteristics. They are not passed on to offspring through reproduction.
HOPE YOU FIND THIS HELPFUL!! (Please mark brainliest!)
if an Object has a density of 0.9 g/cm^3 and you put it into water with the flow or sink
describe the process of building a paradigm and of shifting one
Answer:
Explanation:
A paradigm shift is a major change in the concepts and practices of how something works or is accomplished.
A paradigm shift very often happens when new technology is introduced that radically alters the production process of a good or service.
Although the idea of paradigms has been around for quite some time, the concept was explored by physicist and philosopher Thomas Kahn Kuhn.
Which best describes the role of chlorophyll in energy conversion?
Answer:
Explanation:
Chlorophyll absorbs light and converts it to chemical energy. ... During photosynthesis, plants absorb light energy from the sun and convert it into chemical energy in the form of glucose.
The role of chlorophyll during the process of photosynthesis is that it effectively converts the captured radiant energy (light energy) from the sun to chemical energy.
What is Chlorophyll?Chlorophyll may be defined as the type of green-colored pigment which is present in all green plants, some algae, and cyanobacteria. It is present in the chloroplast of the plant and carries out the entire process of photosynthesis.
This green-colored pigment is generally made up of porphyrin rings with magnesium being the co-factor. A chain of carbon and hydrogen is also present. This is known as the Phytol tail. The function of chlorophyll in each photosynthetic organism remains the same throughout.
Therefore, the role of chlorophyll during the process of photosynthesis is that it effectively converts the captured radiant energy (light energy) from the sun to chemical energy.
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5 Some students were asked to identify which cells contain the greatest number of
mitochondria. They were given the following choices: blood, epidermal, cardiac, and
nerve cells. Which of the following is the best response?
A Blood cells, because they must carry oxygen throughout the body all the time,
which requires energy.
B Nerve cells, because energy is needed to relay messages throughout the body
C Cardiac muscle cells, because the heart must work all the time, requiring constant
energy.
D Epidermal cells, because the skin must constantly grow new skin cells, which
requires energy.
Answer:
C.) Cardiac muscle cells, because the heart must work all the time, requiring constant
Explanation:
Our heart muscles contain so much mitochondria because those muscles are very active in our body and require lots of energy to constantly pump blood through our circulatory system. Mitochondria produce energy in the form of ATP from glucose (sugar) in our cells.
Which of the following is NOT one of the potential mechanisms allowing kin recognition among animals? Group of answer choices kin-differential spatial association, so that kin are reliably found in a given place phenotype matching, whereby kin are identified through comparison of their phenotypic attributes with those learned from reliable kin, including oneself kin-differential familiarization, whereb social familiars are treated as relatives. kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin. genetic similarity detection, whereby phenotypic labels are correlated with one's underlying genotype, allowing for kin discrimination based on that.
Answer:
The correct answer is "kin-branding, whereby all individuals are labeled actively by each other at birth so that kin can be discriminated from nonkin".
Explanation:
Kin recognition, also known as kin detection, is an ability developed by some animals to detect organisms that are genetic related and discriminate among other animals that are not (nonkin). There are some mechanisms that animals use for kin recognition, however labeling actively each other is not one of them. In most cases, animals use kin recognition based on pheromonal cues.
Groups of cells work together as tissue. Groups of tissues from organ systems. True or False
Answer:
True
Explanation:
Answer:false
Explanation:
Which planet is most similar in temperature to Earth?
Answer:
It depends; If you're asking for very temporary moments on the planet, it would be mercury, because its temperature ranges from 427 degrees to -180 degrees Celcius. If you were to stand just in the right spot at just the right time, its temperature would be the same as the earth's temperature.
But if you are asking about longer periods of time, it would be Mars. Its average temperature is around -60 degrees celcius, but its summer can get up to 20 degrees celcius.
I really hope this helped you.
Where does the oxygen needed for aerobic respiration come from?
What animal phylum do leeches belong in?
Answer:
What animal phylum do leeches belong in?
Explanation:
Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract.
Answer:
Annelida
Explanation:
"Leeches are segmented parasitic or predatory worms that belong to the phylum Annelida and comprise the subclass Hirudinea. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular, segmented bodies that can lengthen and contract."
Scientific name: Hirudinea
Phylum: Annelida
Kingdom: Animalia