answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Karolina [17]
1 year ago
12

A book sits on a desk. Which of the following must happen before an electrical force can act on the book?

Biology
1 answer:
raketka [301]1 year ago
7 0

Answer:

The last one and the second one

Explanation:

Both of those are technically correct. There must be a charge through the book before an electrical force can act on it. Id have to say the last one

You might be interested in
A scientist is observing a worm that was found inside a host. The worm that's an outer body that is smooth and soft. Which worm
saw5 [17]

Answer:

your answer is tape worm i know this because tapeworms take over inside of a host and its body is smooth and soft.

Explanation:

4 0
2 years ago
Read 2 more answers
The half-life of protactinium-226 is 2 minutes if you started with 20 grams of pa-226 how much do you have after 8 minutes
Hunter-Best [27]

Divide the amount in half for every 2 minutes

0 minutes = 20 grams

2 minutes = 20/2 = 10

4 minutes = 10/2 = 5

6 minutes = 5/2 = 2.5

8  minutes = 2.5/2 = 1.25 grams

4 0
1 year ago
Match each definition to the appropriate term. locus
liraira [26]
I) Locus- the chromosomal site where a specific gene is located. A locus is a fixed position on a chromosome, like the position of a gene or a marker. Each chromosome carries ,many genes; human's estimated haploid (n) protein coding genes are about 20,000, on the 23 different chromosomes.


ii) Interference; the observed double crossover frequency differs from the expected double crossover frequency. Cross over interference is used to refer to the non-random placement of crossovers with respect to each other during meiosis. It results in widely spaced crossovers along chromosomes. Interference may exert its effect across whole chromosomes. As chromosomes in many eukaryotes are large, interference must be able to act over megabase lengths of DNA. 

iii) Linkage- the tendency for genes located in close proximity on the same chromosome to be inherited together. Normally when two genes are close together on the same chromosome, they do not assort independently and are said to be linked. Whereas genes located on different chromosomes assort independently and have a recombination frequency of 50%, linked genes have a recombination frequency that is less than 50%.

iv) Recombination- the process by which a new pattern of alleles on a chromosome is generated. Genetic recombination is the production of offspring with combinations f traits that differ from those found in either parent. During meiosis in eukaryotes, genetic recombination involves the pairing of homologous chromosomes. This may be followed by information transfer between the chromosomes. 
4 0
2 years ago
You live on the beach, which always seems to be humid, especially on hot, sunny days. But, that's because when the ocean heats u
dusya [7]
The correct answer is 1. hydrosphere and atmosphere interaction

That is because the ocean belongs to the hydrosphere while the air belongs to the atmosphere, and the process described is their interaction.
8 0
1 year ago
Read 2 more answers
Which combination of items below is INCORRECT? decomposers – bacteria and fungi pioneer community – lichens and mosses commensal
Akimi4 [234]

Answer:

<u>Option:</u>Symbiosis in which both organisms benefit ecological niche.

Explanation:

  • <u>Symbiotic association between any living organism:</u>

The symbiotic association is the connection between any organisms, which are either benefited by each other or the relationship can be very negative for the either one, or it may be neutral in nature for both the organisms living inside a symbiotic relationship.

The symbiotic association between the different organisms are of four different natures or levels,which are as follows:

  1. <u>Mutualism:</u> Inside the relationship or connection between any number of organisms in which there is mutual benefit for both the organisms, is called as the mutualism. For example, the insecticides living in the plants roots or any part of its body.
  2. <u>Parasitism:</u>Such a symbiotic relationship is which between any two living organism either one of them is benefited while the other one is harmed by its effect. For example, the tape worms in the living body.
  3. <u>Predation:</u> It is more simple to understand as the prey is hunted down and killed in order to fulfill the needs of the predator.For example the lion and the impala.
  4. <u>Commensalism: </u>The type of association between the living organism in which one of the organism is benefited, while other is neither benefited nor harmed. For example the marine life on the back of the crab's body.  
4 0
1 year ago
Read 2 more answers
Other questions:
  • If all the macromolecules are made mainly of the elements CHO, how are they different?
    13·1 answer
  • A scientist finds what she thinks is a new species of rodent on a small Pacific island. However, some similar-looking rodents in
    9·2 answers
  • Fish hatcheries in the mountain states are hoping to begin a breeding program that combines the best features of two fish variet
    6·1 answer
  • The m phase of mitosis and m phase of meiosis both occur after interphase. however, the two processes differ in the arrangement
    11·1 answer
  • Students in biology are studying the macromolecules of life. They used a calorimeter to determine the calories in various types
    10·2 answers
  • Sienna decides to study movement in plants. Identify the correct sequence of the scientific steps, and place the steps in order.
    11·1 answer
  • Directions: This group of questions consists of five lettered headings followed by a list of phrases or sentences. For each phra
    10·1 answer
  • The hydrophilic regions of a membrane protein are most likely to be found are
    13·1 answer
  • A large population of laboratory animals has been allowed to breed randomly for a number of generations. After several generatio
    15·1 answer
  • Appositional growth occurs within the ____________ . In this process, ____________ in the inner cellular layer of the periosteum
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!