While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment

Q: Tomatoes have been genetically engineered to last longer by performing which of the following techni...

A: A genetically modified organism (GMO) is an animal, plant, or microbe whose DNA has been altered usi...

Q: What are the general reasons of animals' existence in each era: Cenozoic, Mesozoic, and Paleozoic?

A: Coenozoic --- It took a catastrophic event to rid the planet of dinosaurs. Luckily for mammals, the ...

Q: What is the difference between a complete digestive system and an incomplete digestive system? How a...

A: Introduction :  Digestion is break down of large food into small soluble food particles that can be ...

Q: It is a process occurring inside the body that is responsible for maintaining core temperature of th...

A: There are few important points which should be kept in mind: Temperature is important in controlling...

Q: A, B,D are three independently assorting genes with their recessive alleles a, b, d respectively. A ...

A: Answer   .Aa bb dd X aa bb dd is the provided cross. As a result, the children created would be

Q: Answer the following questions for the trait of freckles. Freckles is dominant. If both parents are...

A: Introduction :  People with fair or light skin tone some times contain sports on their skin due to c...

Q: Whate are the components of the renal tubule?

A: They excretory organ of the human is called as kidney. These are  two reddish-brown bean-shaped orga...

Q: The attractive force between the .6 * molecules of the liquid is called • Adhesion • Aneurism • Cohe...

A: The matter most common forms in which it exists are solid, liquid and gas. Solids have a definite sh...

Q: Cellular Respiration 2 ATP 6 NADH 2 FADH 2 ATP 2 NADH 36 ATP ETHANOL MITOCHONDRIAL MATRIX MITOCHONDR...

A: Cellular respiration is a process by which chemical energy in the food is oxidized into energy in th...

Q: When the frequency of sitters is 0.75 (see Figure 6.22), the fitness of rovers is much higher than t...

A: The rovers are becoming a larger fraction of the whole population as their numbers grow in compariso...

Q: Give at least 5 Genus and Species under G(+) cocci

A: Gram positive cocci-  Staphylococcus aureus. Micrococcus luteus . Staphylococcus saprophyticus Strep...

Q: How much agarose powder (g) would you use to make a 50 ml, 1.4% agarose gel?

A: Introduction:- Agarose powder is a linear polysaccharide that forms a gel when it is mixed with wate...

Q: Fill in the blank. The advantages of infrared waves are...? A. that they harden dental fillings and ...

A: A. UV light can be used to harden particular glues, resins, and inks by causing a photochemical reac...

Q: With which type of reproduction do we associate the reduction division? Analyse the reasons for it.

A: There are two modes of reproduction mainly, sexual reproduction and asexual reproduction. In sexual ...

Q: Cats are hairless when homozygous recessive (hh) for the Hairless gene. Cats have straight hair when...

A: The Curly haired gene 'C' is dominant in hair shape, while haired gene 'H' is dominant over hairless...

Q: Suppose that you want to clone a gene that has never been analyzed before by DNA sequencing. Which o...

A: PCR is used to amplify the target DNA sequence and it makes multiple copies of a target DNA sequence...

Q: 1. Describe how the phenotype of individuals with sickle-cell disease influences how common the Hbs ...

A: * sickle cell Anaemia is  inherited genetic disorder in which the blood cells will attain sickle sha...

Q: 2. From the zygote, pluricellular organisms are formed by serial mitosis. Would this formation be po...

A: If mitosis starts resulting in offspring identical to their parent cell there would be no variation ...

Q: Statement 1: Restriction enzymes are sequence-specific, which means that they only recognize a short...

A: Restriction endonuclease is an important tool in DNA Recombinant technology or genetic engineering. ...

Q: With respect to the inheritance of X-linked recessive traits, which of the following is true? OA mot...

A: X-linked recessive transmission is a type of inheritance where a phenotype is always displayed in me...

Q: Sister chromatids separate from one another during mitosis in... O Anapha Metaphase Prophase Telopha...

A: Answer  Anaphase

Q: Directions: Write the letter of the correct answer. Do it on a separate sheet of paper. 1. Which is ...

A: Evolutionary developmental biology is considered a new norm in evolutionary biology. It arose from t...

Q: Which process or processes prevents UV radiation from causing cancer? A. MMR B. NHEJ C. HDR O D. Che...

A: UV radiation is a type of non-ionizing radiation emitted by the sun and man-made sources such as tan...

Q: 4) In tomatoes, round shape (R) is dominant to pear shape (r). A student crossed a plant that had ro...

A: Mendel uncovered the fundamental laws of heredity. His experiments demonstrated that the inheritance...

Q: All grown up, Baby X fell madly in love with Baby Z and they decided to have children. What is the p...

A: To know the blood type of any individual ABO system is the best system .  There are 4 major types of...

Q: 1.  List four general methods for experimentally inhibiting the activity of a specific gene with cit...

A: Gene inhibition is the regulation of gene expression in a cell that deactivates or silences or preve...

Q: Which molecule does not form during glycolysis?a. NADH c. FADH2b. pyruvate d. ATP

A: ANSWER:  To get to know which molecules do not form during glycolysis. We need to have a look at the...

Q: Describe the structure of mature phloem tissue. What are the unique features? What kind of problems ...

A:

Q: explain the differences between the Gram-negative and Gram-positive bacteria cell wall structure and...

A: Gram staining: It is a widely employed method to identify and differentiate two large groups of bact...

Q: In peas, tallness is dominant over dwarfness, and red colour of flowers is dominant over the white c...

A: Introduction: • Dominant allele or factor can form complete polypeptide or enzyme for expressing its...

Q: Please answer fast Which type of cells normally drive class switching to IgE and how? How might the...

A: Answer 

Q: Polydactly is an autosomal dominant phenotype. In this pedigree, I-2 has one copy of the dominant al...

A: A condition in which a baby is born with one or more extra fingers is known as polydactyly. It's a p...

Q: Match the sentence to where you would most likely find it within an article -- th results or discuss...

A: A research paper is a primary source of literature which tells us about a scientific process which h...

Q: As consumers you and I essential roles in diminishing the food industry’s injustices. Child slavery ...

A: The Coffee industry uses most child labour. 

Q: Obligate aerobes, faculative anaerobes, microaerophiles, obligate anaerobes, or aerotolerants grow o...

A: *obligate aerobes are the organisms that grows only in presence of  oxygen. *These organisms by cell...

Q: Can polyadenation be used to regulate enzymatic activity?

A: Can polyadenation be used to regulate enzymatic activity?  Introduction : An RNA transcript, usually...

Q: Chromosomal DNA is duplicated during the phase of the cell cycle. O G1 G2 O Mitotic OS

A: correct answer = S phase S phase  is also known as synthesis phase in which DNA replication starts i...

Q: 9.The combining form metr/o means: A. measure B. multiple C. uterus D. ovary 10. The suffix -salpinx...

A: Medical terminology is composed of prefix, root word and suffix. Prefix is used at the beginning of ...

Q: Write a sentence about the purpose of vascular plant structure lab.

A: Vascular plants are efficient in growth and development due to the presence of vascular tissues.

Q: In organism A, blue skin colour is dominant over yellow. If, heterozygous blue-skin of organism A we...

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous c...

Q: Virology:Name the 3 ways you can initiate RNA synthesis and a name a virus that uses this strategy .

A: Introduction: Transcription:The copying of genetic information from DNA to RNA is known as transcrip...

Q: Why was the medusa stage lost in some cnidarians? Do you think it is more advantageous

A: Solution : In the phylum Cnidaria, which includes jellyfish and sea anemones, polyp and medusa are t...

Q: What was the type of symmetry found in the lancelet? Did the lancelet have a brain? Based on your an...

A: Comparative anatomy is the study of the "similarities and dissimilarities" between various objects. ...

Q: What are the difference of G, Q and R bands in karyotyping

A: Cells are the building blocks of life. Genes are the hereditary currency of life. Cells home various...

Q: 14/ When red blood cells are placed in a low-concentration saline solution, we notice deformation an...

A: 14.Osmosis can be defined as a movement of water from the region of its  higher concenteration to th...

Q: What kind of specimen is in the picture and what is its epithelium

A: Epithelium is the type of body tissue that forms the covering on all internal and external surfaces ...

Q: 13. IN YOUR OWN WORDS explain the concept of Social Darwinism by changing the word "species" to "gro...

A: Human evolution is defined as "the process by which humans evolved on Earth from now-extinct apes." ...

Q: Where does the 5’ cap come from ?

A: 5' cap(5 prime cap) is a modified guanine nucleotide which is added to the first nucleotide (5' end)...

Q: Identifying and evaluating the eth and implications GMOS and its pot

A: Genetic modification produces genetically modified animals, plants and organisms. If they are introd...

Q: Are symporters and antiporters always involved in active transport? Can't both solutes move in the s...

A: The cell uses active transport, that takes energy derived from ATP, to move molecules against the me...

Human Evolution

Human evolution is the process of evolution of humans from early man to anatomically modern humans. The process of evolution in humans leads to the gradual development of traits like bipedalism. Humans are the highly social animals that make them the most advanced animal on Earth.  Human evolution is an outcome of interaction among the following processes: