When did concern over the effects of pesticides start to grow in the United States? Describe the argument presented by Rachel Carson in Silent Spring. What policy resulted from the book’s publication? Where and how is DDT still used?

Q: If the GC content of a DNA molecule is 48 percent, whatare the percentages of the four bases (A, T, ...

A: DNA is a double-stranded molecule that houses genetic information.  

Q: Which part of the nervous system is in charge of the "fight or flight" response? O automatic nervous...

A: Nervous system is defined as the network of neurons and fibres present in the body. It regulates the...

Q: 3

A: Flight or Fight Response is an excessive sympathetic firing situation in which all the body processe...

Q: Define the features recognition sequences ?

A: Restriction enzymes are endonucleases and digest the DNA molecules into smaller fragments.  

Q: The part of the neuron that is usually a single lorg extension that conducts an impulse to a muscle ...

A: Neuron is the nerve impulse producing and transmitting cells in the nervous system. They have the ca...

Q: Why are nematodes ubiquitous and numerous? What is the role of their cuticle in their  successful pr...

A: Nematode worms are among the most ubiquitous organisms on the earth and  They include free-living fo...

Q: Describe the specimen and explain how the presence of fossil bacteria supports the idea that the Ear...

A: Answer : specimen is the term used for the sample of anything which is used for testing and which te...

Q: A. Part 1: F1 Generation Yellow Sampaguita- Homozygous recessive (cc) White Sampaguita- Homozygous...

A: Introduction: Dominant allele is able to express itself even in the presence of its recessive allele...

Q: What is a null hypothesis in experiments? How is a null hypothesis used in science experiments

A:

Q: What are the main types of mutations?

A: Introduction  Any change in the DNA sequence of a gene can alter the function of the protein coded b...

Q: Genotype frequency of two alleles have been calculated to be p = .2 and q = .8 Is this population of...

A: C. Not enough information to calculate this.

Q: Miguel went to the dentist, who performed a procedure that eliminated his tooth pain. The next time ...

A: There is a relationship between the stimulus and the behaviour. Our behaviour can change according t...

Q: Four homozygous recessive mutant lines of Drosophilamelanogaster (labeled 1 through 4) showed abnorm...

A: Introduction Heterozygous means that you have inherited various versions of a gene from each parent....

Q: At what stage of the culture should bacterial colonies be harvested for plasmid DNA extraction? How ...

A: Plasmid training is a way of DNA extraction and purification for plasmid DNA. Many techniques were e...

Q: Explain the terms "methylase," "methylates" and "methylation"

A: METHYLASE:- A methylase is the enzyme that recognizes a specific sequence and methylates one of the ...

Q: A recognized set of symptoms that characterize a genetic disorder is a(n)______ . a. syndrome c. abn...

A: Genetic disorders are caused by genes.  

Q: How might understanding population dynamics help us better manage this invasive species and its impa...

A: Population Dynamics is the study of the Population characteristics like size ,density of the populat...

Q: Huntington’s disease is a dominant trait inheritance in humans. What is/are the possible genotype/s ...

A: Huntington 's Disease is a neurodegenerative disorder which shows autosomal dominant inheritance pat...

Q: Provide the embryological explanation of Humans have respiratory structures from the gut, for fishes...

A: The respiratory system is a collection of organs and tissues that assist in breathing. Your airway, ...

Q: Write and submit a lab report showing any relationship between blood pressure readings of your class...

A: Introduction:- Blood pressure is a measure of the force that your heart uses to pump blood around yo...

Q: Some protozoan pathogens form ________ to protect themselves from harsh conditions in the environmen...

A: The protozoa are the single celled eukaryotic organisms that are mostly parasitic in nature. They ar...

Q: The number of species on an island depends on the size of the island and its distance from a mainlan...

A: Species are groups of organisms that can interbreed and produce fertile progeny.  

Q: What is Known as photosynthesis?

A: Green plants (autotrophs) are the manufacturers of organic compounds. They are the producers in the ...

Q: rforming PCR below with 1 as the

A:

Q: A deer eats 25kg of herbaceous material per day. The herbaceous material is approximately 20% dry ma...

A: This food chain is an open system because this food chain exchange energy and with its surroundings.

Q: Describe safety measures put in place for genetic modification.

A: The Food and Drug Administration (FDA), Environmental Protection Agency (EPA), and Department of Agr...

Q: Describe stage 2 of the Calvin Cycle. Be sure to include the main molecules involved, and the main m...

A: The Calvin cycle is an important process utilised by all plants to get nutrition by converting the m...

Q: What is a gene?

A: Introduction All living organisms contain genetic material in form of DNA or RNA which get inherited...

Q: (a) What is resource partitioning? (b) Fully describe an excellent example of resource partitioning.

A: A community consists of a population of different species.

Q: Mouse Cat Baboon Cost to purchase one animal $5.00 $50.00 $500.00 Cost to maintain one animal for on...

A:   Mouse Cat Baboon Cost to purchase $5.00 $50.00 $500.00 Cost to maintain $45.00 $200.00 $500.00...

Q: Suppose that you are asked to write a new class for DNA. What are the main attributes and functions ...

A: Introduction: DNA stands for 'deoxyribonucleic acid' and it is the hereditary material in humans and...

Q: Q6.10. For a population containing 80 females and 20 males, what is the effective population size, N...

A: Introduction:- One of the most significant parameters in population genetics and conservation biolog...

Q: H* ions generated by reactions in the electron transport chain, as well as H* ions present in the ma...

A: Introduction :  In electron transport chain 4 protein complex create electrochemical gradient to pro...

Q: Compare the structures of DNA and RNA.

A: Nucleic acids are the most important organic compounds found in all living beings. The three major c...

Q: multicellular organisms, nondividing cells stay in G0 phase. For the cell, why is it better to be he...

A: Cells first enter into the G0 phase from a cell cycle checkpoint then in the G1 phase, there are som...

Q: Can the amount of available energy on a given trophic level be larger than the available energy on l...

A: The number of steps an organism has taken from the beginning of the food chain determines its trophi...

Q: Distinguish between polyploidy and aneuploidy

A: A chromosome is a tiny thread-like structure found in the nucleus of eukaryotic cells (animal and pl...

Q: Select all the statements that are true regarding the drug treatments available for infectious disea...

A: *Infectious diseases are caused by organisms like bacteria and viruses and  fungi and parasites. *Ma...

Q: Match the effector organs for growth below with the goal of their response. (Choose] liver growth in...

A: Several tissues and organs utilizes different functional aspects to grow. Some utilizes energy and s...

Q: Give a microbial species or microbial group that could be involved in the following: Alcohol product...

A: Answer--

Q: Discuss the traits in the body (not head/skull) that define Primates and set them apart from other m...

A:

Q: Hello, good day. I have a problem answering this question, and I need your help. Hoping for a respon...

A: Mosquito repellent: the chemicals that repels the mosquito away. 

Q: What is significant about Homo erectus in the human lineage

A: Homo erectus  was the first of our relatives to have human-like body proportions, with shorter arms ...

Q: How are grasslands classified?

A: In this question we will discuss about how grasslands are classified.  

Q: asystole

A: The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the b...

Q: How does the vegetal stratification of an ecosystem influence its biological diversity?

A: Im this question we will discuss about how the vegetal stratification of an ecosystem influence it's...

Q: Explain the concept of electrophoresis.

A: Introduction Genetic engineering is the process of altering an organism's genetic makeup using recom...

Q: Explain the use of a probe in screening a DNA library

A: Introduction: Probes are the small DNA or RNA strands that are used to label DNA. The labeling of DN...

Soil Ecosystem

Soil provides a habitat or living environment for a large number of different species of organisms as well as plants. It provides all the essential nutrients and minerals for plants to grow. All these together form the soil ecosystem.