The seven-day blastocyst: A. has a single layer of trophoblast at the embryonic pole B. has an amniotic cavity C. is attached to the endometrial epithelium D. is surrounded by a degenerating zona pellucida E. is called the hypoblast

Q: In pea plants, P is purple flowers, p is white flowers, T is tall plants, and t is short plants.…

A: Introduction : A dihybrid cross describes a mating experiment between two organisms that are…

Q: Type of Medium Original Color Any Chemicals Added to Visualize Reaction? Negative Result Positive…

A: Phenol red Glucose original colour will be yellow.  Negative results indicates that there is drop in…

Q: 1. Some plants grow mostly upward and no side branches. This condition is known as A. Apical…

A: Phytohormones or plant hormones are specific chemical molecules that are released from specific…

Q: COVID-19 as examples)

A: We are discussing the COVID-19,  Targeted- when we go through targeted therapy in the person, we…

Q: Week 1 (lessons 1 and 2) 1. Explain how to properly micropipette (tips, drawing samples, ejecting…

A: The micropipette is a basic scientific research tool for properly and precisely transferring…

Q: A pest that could become a major pests when something change in the agroecosystem?

A: In agroecosystem;pest can be defined as any insects or animal species which can cause damage to the…

Q: 600 90°N 60°N 500 30°N 0° 400 Insolation 300 (Wm) 200 100 JF MA MJ J'A'S o'N'D Month The skin tone…

A: Melanocytes are spider-shaped epithelial cells that produce or synthesize melanin (a pigment) and…

Q: Contractile roots usually are combined with such shoot modification as A. Bulb B. Tuber C. Rhizome…

A: Plants contain different parts such as roots, stems, leaves, flowers, and fruits. Each of the parts…

Q: 9. Regarding the gray matter in the spinal cord, all of the fóllówing äre corree EXCEPT which one?…

A: * Grey matter make up the outermost layer of the brain and  it is present in pinkish grey in colour…

Q: The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the: A.…

A: Introduction Sperm is the male gamete or reproductive cell, in anisogamous forms of sexual…

Q: Surgical instruments are cleaned by heating them. Alcohol is used as disinfectant in cleansing the…

A: The most efficient method of sterilizing surgical instruments is Intense heat provided they can…

Q: 1. Which of the 10 reactions of glycolysis are (a) phosphorylations, la (b) isomerizations, (c)…

A: Note: As you have posted multiple questions, as per Guidelines for the remaining answers, please…

Q: How did evolution ever lead ostriches to hide their head in the sand when an enemy approaches?

A: *Before evolution takes place Ostriches doesn't hide their head in the sand and when approached by…

Q: The pedigree below shows a family affected by a disease. Assume that the individuals marked with an…

A: * Genotypes refers to genetic makeup of an organism which describes an organisms complete set of…

Q: The adaptive response to DNA damage is to increase levels of the polar signaling molecule, _____,…

A: The outcome of  increased synthesis of protective pigments :-

Q: What evolutionary processes are involved in the origin of new SARS-COV2 lineages, and subsequent…

A: * Evolutionary processes involved in origin of new SARS cov 2 lineages and subsequent change in…

Q: Identify the tubular transport mechanisms that are hormonally regulated.

A: Tubular transport mechanisms that are hormonally regulated.

Q: Please help me with identifying which of the following cranial traits listed are present in this…

A: Every skull has few  characteristics by which it can be identified and ascertained to which age it…

Q: gpll, gpV and gpX with the rolling cycle replication pattern of M13.

A: DNA Replication : DNA replication is the phenomenon or process in which a duplicate copy of DNA is…

Q: 11) Imagine that you go the spa and sit in the dry sauna (where it is very hot) for longer than the…

A: Homeostasis refers to the process of maintaining internal physiological parameters in a changing…

Q: How does the forelimb grow differently than the hindlimb? How can limb size be so precisely…

A: During the development of vertebrate limbs, the limb bud is formed. It occurs during the fourth week…

Q: The difference between a linking number in a relaxed state vs supercoiled state?

A: Linking number It refers to to winding of DNA strands. It is the number of times the strand winds…

Q: are the most successful (in terms of number of 1. Lst four reasons why angiosperms species) of plant…

A: Plants are divided into two types based on flowers. Angiosperms are large family of plants which…

Q: Modern evolutionary theory now shows exception to Charles Darwins' proposal that populations show…

A: False Darwin defined evolution as "descent with modification," the idea that species change over…

Q: L. polyrhiza or L. gibba: Which species is the better intraspecific competitor? Time Time Time The…

A: Introduction Species interaction is one of the key phenomenon of an ecosystem where individuals of…

Q: If in 20 years from now policy makers are finally creating a bill to reduce the impacts of climate…

A: mitigation and geoengineering together will allow us to avoid the need for adaptation

Q: The darkly stained structures in this cell are microtubules. strands of chromatin, spindle fibers.…

A: This picture shows the cell undergoing the cell division.Cell division is very important for growth…

Q: Please, rank the following vegetation types in ascending order from bottom to top (starting with the…

A: Plant muddle is a crucial thing for environment functioning and nutrient cycling.  Litter…

Q: What is one difference between fermentation and anaerobic respiration?  Since neither requires…

A: Respiration  There are three types of processes of oxidation of food substrates in different…

Q: Match the theory or experiment with the correct scientist. [ Choose ] Medawar Wiesmann Hamilton)…

A: Introduction Peter Brian Medawar:- He was a Brazilian-British biologist, he is known for his…

Q: 3) A. How are the following proteins involved in cell division: condensing, cohesin, kinetochore…

A: The genotype is a combination of alleles of a gene that gives a person unique characteristics.…

Q: Provide examples to decrbe the seps whereby a molecule of sucrose isoxidized to CO; in gyolysi,the…

A: * pentose phosphate  pathway also called as  phosphogluconate pathway and the hexose monophosphate…

Q: Neurological disorders are the leading cause of disability worldwide and the absolute numbers of…

A: Neurological disorders, symptoms, management and treatment.

Q: Write note on polysa

A: Carbohydrates are macronutrients and are one of the three main ways by which our body obtains its…

Q: Which of the following crosses would not result in heterosis   a) AAbb x aaBB b) AABBccdd x…

A: "Genetic variation" is the result of the recombination of genetic material during the inheritance…

Q: Ve don't counsel patients when we look for a tumour marker to iagnose cancer, which is often more…

A: Taking the HIV test is a very traumatic event. Furthermore, this trauma reaches an extreme condition…

Q: Imagine that a NEW extremely contagious and deadly disease has swept the Earth. What would society…

A: Contagious diseases are those diseases that spread from one to another through air and water. With…

Q: Given that you have an even-skipped mutant (Drosophila) which results in the loss of stripe #5,…

A: The even skipped quality (eve) encodes a homeodomain (HD) record factor expected during Drosophila…

Q: Do eukaryotic cells have restriction endonucleases? Justify your answer.

A: No eukaryotic cells do not  have restriction endonucleases.

Q: QUESTION 5 is the mucus membrane layer covering the eye and eyelid.

A: The conjunctiva is the mucous membrane that lines the eyelid and eye surface. In a healthy eye, the…

Q: Question 5 options: 1 is rated using a star system on sunscreens 2 has multiple forms; some…

A: Answer of Question 5 Sunburn is an skin damage, that is caused by too much exposure of UV light.…

Q: As cells grow and regenerate, what mechanism does the body use to get rid of the continuously dying…

A: * Cells in the body will be continuosly produce to replace the dying cells by the bone marrow. *…

Q: Explain the different between a cross-sectional study design and a cross-over study design.

A: *Cross over study is a clinical trial in which all participants will receive the same treatment but…

Q: CIA Problem 20.1 Look at the structuros of the blood group døterminants. Red blood oell N-Acetyl-…

A: Ans - Option 1 is true because Blood group A has a molecule of N- acetyl glucosamine that is linked…

Q: Explain briefly : (a) PCR

A: PCR stands for Polymerase Chain Reaction. PCR is used to make multiple copies of a gene.

Q: Write note on polysaccharides

A: Carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms. These are of three…

Q: Dose= 2Gy, 5 MeV Comments Gamma- Rays Alpha Particles Effect of radiation Direct/Indirect The most…

A: Introduction Cell mutation is any change in the DNA sequence of a cell, exposure to chemicals called…

Q: Discuss the evidence used to establish the causal association between virus infection and cancer.…

A: Introduction  Cancer is a popular disease now a day. In the US, 1 in 2 women and 1 in 3 men develop…

Q: What are plant cell cuoles? What are their nctions? What is the vering membrane of the

A: The smallest unit in biology can exist on its own and makes up all living creatures and bodily…

Q: The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the: A.…

A: The correct option is D. Acrosome