7. Gene expression may be regulated:
A) only during translation
B) only during transcription
C) during transcription and translation
D) only during replication
E) during replication and transcription
8. During anaphase of meiosis I toward opposing poles of cell are pulled:
A) whole chromosomes
B) sister chromatids
C) bivalents
D) fragments of sister chromatids
E) tetrads
9. One of a series of different versions of gene is called:
A) genome
B) haploid
C) diploid
D) allele
E) allosome
10. Which of the following genotypes would produce the smallest number of different gametes if the alleles are assorted independently?
A) aa BB Dd
B) AA BB DD
C) Aa Bb DD
D) Aa BB DD
E) Aa Bb Dd
11. Which of the following processes can decrease the genetic variation in natural populations?
A) recombination
B) immigration
C) mutagenesis
D) inbreeding
E) hybridization
12. Which of the following structures present in the embryos of higher plants develops into primary leaves of seedlings?
A) epicotyl
B) endosperm
C) radicle
D) hypocotyl
E) cotyledon
13. Which of the following organisms would be classified as primary consumer?
A) lion
B) Escherichia coli
C) barley
D) cow
E) Candida albicans
14. Which of the following characterizes monocotyledonous plants?
A) Their embryos have one cotyledon.
B) In their stems vascular bundles are usually arranged in ring.
C) Their flowers parts are usually in multiples of four or five.
D) They have usually taproot.
E) Their leaves usually have netlike veins.
15. Which of the following types of plants tissue transport water and minerals?
A) phloem
B) xylem
C) meristem
D) vascular cambium
E) epidermis
16. Which of the following require a host cell because they are not able to make proteins on their own?
A) Paramecium caudatum
B) Escherichia coli
C) Influenza virus
D) Saccharomyces cerevisiae E) Euglena viridis
17. Which of the organisms is not correctly labeled?
A) Bacteria – Staphylococcus aureus
B) Plantae – Pine
C) Fungi – Spider
D) Animalia – Lion
E) Viruses – HIV
18. Eutrophication is the process of:
A) vegetation succession in lakes
B) nutrient depletion of lakes
C) increase inflow of minerals in lakes
D) primary succession in lakes
E) biological renewal of aquatic ecosystems
19. Which of the following is a prezygotic isolating mechanism to prevent reproduction between species?
A) geographic isolation
B) zygotic mortality
C) isolation by hybrid sterility
D) isolation by hybrid breakdown
E) isolation by hybrid inviability.
20. Which of the following plant tissue is characteristic only for the leaves, but not for the roots?
A) xylem
B) phloem
C) epidermis
D) cambium
E) mesophyll
21. Rhizobium forms an endosymbiotic nitrogen fixing association with roots of:
A) pine
B) rice
C) rose
D) bean
E) coconut palm
22. Which of the following is found in an unusual high proportion in cells of cardiac muscle?
A) lysosomes
B) mitochondria
C) mRNA
D) Golgi apparatus
E) cell nucleus
23. Which of the following organisms would most likely be found at the top of an energy pyramid?
A) clams
B) sardines
C) sharks
D) kelp
E) mollusca
Meiosis
female gamete
Meiosis
male gamete
X
zygote
embryo
25. Echinococcosis disease is caused by:
A) Echinococcus
B) Diphyllobotrium
C) Trichinella
D) Enterobius
E) Fasciola
26. Which of the following organisms conduct ethanol fermentation?
A) yeasts
B) bears
C) spiders
D) barley
E) mushrooms
27. Steroids are not:
A) sex hormones
B) cholesterol
C) corticosteroids
D) bile acids
E) vitamin C
28. Which of the following is the right order of the four stages of food processing?
A) digestion, ingestion, absorption, elimination
B) ingestion, digestion, elimination, absorption
C) ingestion, digestion, absorption, elimination
D) digestion, ingestion, absorption, elimination
E) absorption, elimination, digestion, ingestion
29. Which of the following statements is true?
I. The pH of urine is close to neutral (7).
II. Urine is a liquid product of the body that is secreted by urinary system. III. Lack of vasopressin in the blood increases diuresis.
A) I
B) II
C) I, II, III
D) III
E) I, III
30. Which hormone is produced by the placenta?
A) progesterone
B) insulin
C) thyroxin
D) melatonin
E) glucagon
31. Which of the following is not characteristic for mammals?
A) mammary glands
B) hair
C) cold-blooded
D) three middle ears bones
E) sweat glands
32. All of the members of a particular species that live in one area are called a(an):
A) biotope
B) community
C) ecosystem
D) biosphere
E) population
Answer:
Omg questions are sooo long
What is immigration?
A. When animals leave an ecosystem
B. When animals are born in an ecosystem
Ο Ο Ο O
C. When animals move into an ecosystem
D. When animals die in an ecosystem
Answer:
C. When animals move into an ecosystem
Explanation:
Why do you think type 2 diabetes occurs so much more often than other inheritable diseases? Propose a hypothesis for why this allele has not been eliminated by natural selection.
Which type of species best describes a mouse: opportunistic or equilibrium? Explain why a mouse or rat population would continuously grow while other mammals (cheetahs) are nearly extinct.
Answer:
This allele has not been eliminated by natural selection because it may confer an adaptive advantage for particular environmental conditions
Mice and rats are opportunistic species. These species can rapidly adapt to different environmental conditions, while cheetahs are unable to adapt to changing environments.
Explanation:
An allele is a gene variant that may be beneficial, neutral, or deleterious for a particular environment. Different alleles are not eliminated by natural selection against other alleles (even when a priori seem to be deleterious) because they confer a selective advantage in a given environment. For example, the allele for sickle cell anemia is caused by a point mutation which is lethal in homo-zygous individuals, but heterozygous individuals are less likely to die of malaria, thereby this allele has been positively selected in geographic areas where malaria is an endemic disease. Moreover, mice and rats are opportunistic species, i.e., they are species that rapidly adapt to varied living conditions. These species are characterized to have high growth rates and produce many offspring. On the other hand, the cheetah is a highly specialized species that is unable to adapt to changing environments. In consequence, cheetah populations are more prone to become extinct than rat and mice populations.
What is the probability that a hybrid individual with the genotype AabbCcddEeFf will produce a gamete that has the genotype abCdeF
Answer:
6.25%
Explanation:
Find the number of different gametes that can be produced
number of gametes produced = 2^n
n is the number of allele pairs that are heterozygous
there are 4 heterozygous allele pairs, these are: Aa, Cc, Ee and Ff
2^4 = 16
abCdeF is one of the 16 genotypes that could be produced
to find the percentage, divide 1 and 16 and multiply by 100
1 ÷ 16 = 0.0625
0.0625 × 100 = 6.25
Quadrupedal monkeys __________ Group of answer choices have long arched spines for flexible movement when leaping. hold their bodies parallel to the ground (pronograde posture) when walking have narrow rib cages with scapula on the side, limiting the range of motion in the shoulder All of these traits characterize quadrupedal monkeys
Answer:
All of these traits characterize quadrupedal monkeys
Explanation:
Quadrupedal monkeys have long arched spines that is used for flexible movement when jumping to a height. They hold their bodies parallel to the ground because of pronograde nature means these monkeys walking with the body by using four legs. While walking they have narrow rib cages with scapula on the side that limits the range of motion in the shoulder.
6. Which directly describes the female part of a flower?
It's called the pistil and it contains the filament and the style.
It's called the stamen and it contains the filament and the anther.
It's called the stamen and it contains the stigma and the anther.
It's called the pistil and it contains the stigma and the style.
Explanation:
D ,cause it is made up of the stigma and style
Answer
It's D
Explanation:
I took the quiz :p
Which of the following groups includes a protozoan that is transmitted sexually?
A.) Chromalveolata
B.) Amoebazoa
C.) Excavata
D.) Archaeplasteda
E.) Rhizaria
Answer:
i think A
Explanation:
Your friend works in a lab that examines microtubules. She decides to grow some microtubules in vitro. After growing some with normal (Alpha-Beta)‐tubulin dimers bound to GTP, she replaces them with only GMPCPP bound (Alpha-Beta)‐tubulin dimers. GMPCPP is analog of GTP that cannot be hydrolyzed to GDP
Will she observe dynamic instability in her GMPCPP‐bound microtubules? Explain.
Answer:
No, she will not observe dynamic instability
Explanation:
Microtubules are dynamic polymers formed by the assembly of α‐ and β‐tubulin, which alternate between growing and shrinking states. These states are regulated by the hydrolysis of GTP bound to β-tubulin. In consequence, the dynamic behavior of the microtubules depends on the binding and hydrolysis of GTP by β-tubulin, which alters the conformation of tubulin molecules. The Guanylyl 5′-α,β-methylenediphosphonate (GMPCPP) is a slowly hydrolyzing analog of GTP that binds to tubulin with an affinity four to eightfold lower than GTP, which is used to produce stable microtubules that resist their depolymerization. When microtubules are polymerized with GMPCPP, they do not undergo dynamic instability, because GTP hydrolysis is necessary for their switching behavior.
A Ribosome's primary function is to:
A. Make an RNA copy of DNA.
B. Translate mRNA into a protein.
C. Make a DNA copy of RNA.
D. Translate a protein into mRNA.
Answer:
A ribosome, formed from two subunits locking together, functions to: (1) Translate encoded information from the cell nucleus provided by messenger ribonucleic acid (mRNA), (2) Link together amino acids selected and collected from the cytoplasm by transfer ribonucleic acid (tRNA). hope that helps❤
A ribosome's primary function is to translate mRNA into a protein. Thus, the correct option is B.
What are Ribosomes?Ribosomes may be defined as the spherical and glandular particles that occur freely in the matrix or remain attached to the Endoplasmic reticulum (RER).
Ribosomes play an important role in protein synthesis by translating mRNA into a protein. They are also involved in the decoding of messages and the construction of peptide bonds.
Therefore, the correct option for this question is B.
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The stage of the cell cycle during which two new and fully functional nuclei are formed is called ________.
Answer:
karyoninesis
(that's what I think you asking)
Explain how the articulation between the upper and lower jaws effects the action of the teeth and the feeding ability of the carnivore?
Answer: Carnivores have unique characteristics of their jaw articulation, or the joint between their upper and lower jaws, which enable them to more.
Acinar cells of the pancreas release: Acinar cells of the pancreas release: cholecystokinin. pancreatic juice. glucagon. insulin. g
Answer:
pancreatic juice
Explanation:
The pancreas secretes the pancreatic juice, composed of enzymes, water, bicarbonate, and electrolytes produced by acinar and epithelial cells. Secretory pancreatic cells are organized in sac-shape structures called acini. These structures are conformed of acinous cells and center-acinous cells that secrete digestive enzymes into the intestine The pancreatic juice flows along the principal pancreatic duct to the bile duct and from there to the small intestine. In the intestine, it degrades fats, carbohydrates, and proteins.
Viral or bacterial germs that invade body cells are called _____.
phagocytes
pathogens
white blood cells
lymphocytes
Choose the true statements about the evolution of complex characters, such as powered flight.
a. The intermediate stages in the evolution of a complex character had no fitness advantage.
b. Often the initial stage in the evolution of a complex character was an adaptation to some unrelated selection pressure.
c. Usually a single mutation in one gene leads to the simultaneous appearance of the complex character.
d. Phylogenetic analysis using cladistics can help reveal the sequence leading to the evolution of a complex character.
e. Usually a single mutation in one gene leads to the simultaneous appearance of the complex character.
Answer:
b. Often the initial stage in the evolution of a complex character was an adaptation to some unrelated selection pressure.
d. Phylogenetic analysis using cladistics can help reveal the sequence leading to the evolution of a complex character.
Explanation:
The evolutionary developmental program of complex characters can be analyzed by examining synapomorphies, i.e., by examining shared, derived characters common between an ancestor of a given taxonomic group and its descendants. Synapomorphies are able to create evidence for historical relationships between closely related organisms. Moreover, cladistics is a method used to categorize species/taxa into groups called 'clades' based on arranging organisms with similar traits, which can provide useful information on the evolutionary history of complex traits in different species/taxa. In phylogenetics, the analysis of complex characters involves two different stages: 1-character analysis and 2-cladistic analysis. Homology refers to structures that look similar because they were inherited from a common ancestor (i.e., they have a common origin); whereas characters are considered as parts of transformation series. In cladistics, characters used for inferring phylogenetic relationships are considered as hypotheses of homology that are subject to tests of similarity. In consequence, such characters can provide useful information on the evolutionary history of complex traits.
heavenly bodies that travel around a planet are called satellites or moon which planet has no satellite or moon
A. mars and venus
B. jupiter and venus
C. jupiter and mars
D. mercury and venus
Answer:
i think its A. i dunno if it is btw have a nice day
Answer:
D. Mercury and Venus
How are inherited characteristics passed on through generations?
Inherited characteristics are passed on through generations via the transfer of genetic information from parents to offspring. This genetic information is encoded in DNA, organized into genes, and carried on chromosomes.
How are inherited characteristics passed on through generations?Inherited characteristics are passed on through generations via the transmission of genetic information from parents to offspring. This genetic information is contained within molecules called DNA (deoxyribonucleic acid), which is located in the cells of organisms. The process of passing on inherited characteristics is known as heredity, and it occurs through the following mechanisms:
Genes and Alleles: Genes are segments of DNA that code for specific traits or characteristics. Each gene has different forms called alleles. These alleles can vary and determine the variations in traits among individuals.
Chromosomes: DNA is organized into structures called chromosomes. Humans have pairs of chromosomes, with one member of each pair coming from each parent. Each chromosome contains numerous genes.
Gamete Formation: In sexual reproduction, special cells called gametes (sperm and egg cells) are formed through a process called meiosis. During meiosis, the genetic material is shuffled and divided, creating gametes with a unique combination of genetic information.
Fertilization: When two gametes (sperm and egg) fuse during fertilization, they combine their genetic material, resulting in a new individual with a mix of genetic traits from both parents.
Dominant and Recessive Traits: Some traits are governed by dominant and recessive alleles. Dominant alleles mask the presence of recessive alleles. The combination of alleles determines the expression of traits in offspring.
Mendelian Inheritance: The principles of inheritance were first described by Gregor Mendel, and they involve the segregation and independent assortment of alleles during gamete formation and fertilization.
Genetic Variation: Sexual reproduction and the shuffling of genetic material during meiosis create genetic variation among offspring. This variation is essential for populations to adapt to changing environments over time.
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How does a mutation in a sex cell differ from a mutation in a non-sex cell?
O
A. Mutations in sex cells can be passed on to children.
O
B. Mutations in sex cells are chromosomal mutations.
О O
C. Mutations in sex cells are more deadly.
О O
D. Mutations in sex cells are silent mutations.
SUBMIT
Answer:
A.
Explanation:
Mutations that happen in sex cells during meiosis are able to pass onto offspring.
"Mutations in sex cells can be passed on to children." Therefore, option (A) is correct.
What is mutation?A mutation in a sex cell differs from a mutation in a non-sex cell in that mutations in sex cells can be passed on to children. Sex cells, such as eggs and sperm, carry genetic information that is passed on to the next generation during fertilization.
If a mutation occurs in a sex cell, it can be transmitted to the offspring and can potentially affect the genetic makeup of future generations. On the other hand, mutations in non-sex cells, such as skin cells or liver cells, cannot be passed on to offspring because they do not contribute to the genetic material of the next generation.
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The breeds of dogs are all
one species, but they have
incredible genetic diversity.
Who first realized that
variation mattered, even
though he didn't know the
exact mechanism?
A. Lamarck
B. Aristotle
C Darwin
D. Griffith
Answer:
C Darwin
Explanation:
Charles Darwin, the father of evolution theorised that within any population, there exists variation in traits which help the animals adapt to their environment and help them survive.
In the same vein, he believed that the breeds of dogs are all one species, but they have incredible genetic diversity.
Therefore, Charles Darwin first realized that variation mattered, even though he didn't know the exact mechanism.
Identify this specific form element
Answer:
form I html document
Explanation:
I think its will help u
What is Endoplasmic Reticulum? -,-
Answer:
It is a transportation system.
Explanation:
The endoplasmic reticulum is considered as the transportation system of the eukaryotic cell, and perform many important functions such as protein folding. Endoplasmic reticulum is a type of organelle which is made up of two subunits i.e. rough endoplasmic reticulum, and smooth endoplasmic reticulum. Endoplasmic reticulum performs a variety of essential cellular functions such as protein synthesis, processing, lipid synthesis, and calcium storage and its release in the body.
Answer:
So, the mitochondria are like the cell's power plant and the nucleus are the command center, then the endoplasmic reticulum (ER) is the cell's factory. This type of organelle is a packaging and storage facility. The ER is separated into two types – rough and smooth.
The rough ER looks like sheets of bumpy membrane. The bumps are just ribosomes attached to the organelle. The function of the rough ER is protein synthesis, (it's where the proteins are made). Ribosomes create amino acids that are built into proteins inside the ER. Some of the proteins are used by the cell, while others are packaged and sent out through the cell membrane for use elsewhere.
The smooth ER is a network of tubes attached to the rough ER. It is called smooth ER because it lacks ribosomes. The smooth ER is responsible for the production and storage of steroids and lipids, also known as fats. It also stores calcium ions used by muscle tissue.
Hope this helped you!
and btw,
No, No, and No. and by the way, this is not English. Its Animal organelles in biology.
The climate is the
weather of an area over a
long period of time.
a Sudden
b Average
c Unusual
d None of the above
is the average weather condition of an area over a long period of time
Some of the largest mountains in the world, including the Himalayas, occur where ?
A . .
two oceanic plates diverge.
B .
two continental plates converge
C . an oceanic and a continental plate diverge
D.
an oceanic and a continental plate converge
Largest mountains such as the Himalayas occur where two continental plates converge
The formation of mountains occurs due to the movement of plates, which are sections of Earth's crust. Moreover, this phenomenon happens when two plates converge or collide as this causes one plate to move beneath the other and creates elevations such as mountains.
Besides this, the formation of big mountains such as the Himalayas is mainly the result of continental plates converging (plates that form continents), for example, the Himalayas formed as the Eurasian and Indian plates collided.
Learn more in : https://brainly.com/question/24319867
Are lizards reptiles or amphibians?
Answer:
Reptiles are turtles, snakes, lizards, alligators and crocodiles. Unlike amphibians, reptiles breathe only through their lungs and have dry, scaly skin that prevents them from drying out
Discuss who is impacted by desertification including which continents are impacted and the role of an increasing population.
Answer:
Africa and Asia.
Explanation:
Africa and Asia are the most affected regions in the world which is greatly affected by desertification. The climate change and human activities has a great impact in these areas which causes desertification as compared to other areas in the world. The increase in population increase the rate of depletion of natural resources which causes more pollution in the environment that leads to desertification in these areas.
How can a zygote receive an abnormal chromosome number?
Explanation:
Some chromosomal conditions are caused by changes in the number of chromosomes. These changes are not inherited, but occur as random events during the formation of reproductive cells (eggs and sperm). An error in cell division called nondisjunction results in reproductive cells with an abnormal number of chromosomes
Chromosome abnormalities often happen due to one or more of these: Errors during dividing of sex cells (meiosis) Errors during dividing of other cells (mitosis) Exposure to substances that cause birth defects (teratogens)
When most main sequence stars exhaust their hydrogen supply, they become giants. Yet on the diagram, there are not
many stars between the main sequence and the giants. What would explain this fact?
Answer:
Main sequence stars change into giant star by exhausting their hydrogen supply.
Explanation:
This fact explain that main sequence stars change into giant star by exhausting their hydrogen supply. A main sequence star burns due to the presence of hydrogen in its core, because of this burning the main sequence reaching the end of its life cycle. Then the pressure of fusion reaction provides an outward thrust that expands the star many times larger than its original size, that leads to the formation of a red giant.
Answer:
As soon as the hydrogen is used up, the star turns to a giant very quickly, spending little time in the transition.
Explanation:
plato
When you pushed the diaphragm up what change occurred in chest cavity pressure? Explain how this change in chest cavity pressure affected the lungs.
Answer:
positive pressure
Explanation:
Exhalation is a passive process during which the intercostal muscles and the diaphragm relax. The ribs move downward and inward, while the diaphragm rises. This movement causes the chest to decrease in size and positive pressure to build inside the chest cavity. The positive pressure pushes air out of the lungs.
Which refers to the distance from the midpoint to the highest point for a transverse wave?
The vertebra in this photograph is from the thoracic region of the vertebral column . is it True or False
Answer:
is there a picture?
Explanation:
i don't see a picture posted with the question
A sensor that monitors and responds to changes in the environment is called the..................
A control center
B receptor
C effector
D receiver
Answer:
Receptor
Explanation:
The receptor is the sensing component that monitors and responds to changes in the environment, either external or internal. Receptors include thermoreceptors, and mechanoreceptors.
