All categories

3 years ago

Most scientists come up with questions to investigate out of the blue

2 answers:

4 0

It is a scientists job and passion to investigate. Sometimes they may come up with a random question out of curiosity and the inept will to discover new and exciting topics and discoveries.

Westkost [7]3 years ago

4 0

Answer:

false

Explanation:

You might be interested in

Which of the following would be classified as a renewable resource?

Yuri [45]

Answer: Solar rays from the sun that take 8 minutes to reach the earth

4 0

3 years ago

Read 2 more answers

The video compares the key similarities and differences between mitosis and meiosis. Determine which events occur in mitosis, me

notka56 [123]

Answer:

Mitosis:

A single division occurs, separating sister chromatids

End result is two diploid cells that are genetically identical to each other and the parent cell

Meiosis:

The first division separates homologous pairs; the second division separates sister chromatids

Homologous chromosomes pair up and form chiasmata

Homologous pairs of chromosomes line up on the metaphase plate

Daughter cells contain recombinant chromosomes

End result is four haploid cells that are genetically different from each other and the parent cell

Mitosis and Meiosis:

Chromosomes duplicate during interphase

Process starts with a diploid cell

Duplicated chromosomes line up Individually on the metaphase plate in a diploid cell

Explanation:

Mitosis is the division of vegetative cells while meiosis involves the division of sex cells. Both divisions start with diploid parental cells but while the daughter cells in mitosis are also diploid, those of meiosis are haploid. This is why mitosis is referred to as equational division while meiosis is known as reductional division.

A cell that will undergo mitosis or meiosis would first have its genetic materials duplicated during interphase in addition to the synthesis of other important biochemicals such as proteins. Mitosis involves just a single division of the sister chromatids with two genetically identical daughter cells who are also clones of the parent cells resulting.

Meiosis, on the other hand, involves two divisions - the first one happens to separate homologous chromosome pairs while the second division separates sister chromatids just like in mitosis. During the early stage of meiosis, homologous chromosomes synapsed through the formation of a synaptonemal complex to form tetrads. Thereafter, synapsed chromosomes exchange chromosomal segments at a point known as chiasmata. All these happen at the prophase stage of meiosis I. The paired homologous chromosomes are then lined up at metaphase where they are engaged by the spindle fibers.

Meiosis II and mitosis are more or less the same with the chromosomes condensing at the prophase and the formation of metaphase plates at the metaphase. Sister chromatids are pulled apart and they migrate to the opposite poles at the anaphase and telophase.

8 0

3 years ago

"What non-native species reached plague proportions but were finally brought under control after the purposeful introduction of

masha68 [24]

Answer:

Rabbits.

Explanation:

The different organism and non native species are known to reach the plague proportions. They are responsible for the disease formation in their as well as in other species as well.

Rabbits are one of the species that has reached the plague proportion. They were brought under the control after the disease has been introduced that affected the rabbits species only.

Thus, the answer is rabbit.

6 0

3 years ago

NEED HELP ASAP!!

Paladinen [302]

I think the answer is C but idk for sure.

6 0

3 years ago

Read 2 more answers

Which of the following statements is true of selective toxicity?

FromTheMoon [43]

Answer:

c. selective toxicity takes advantage of structural and/or metabolic differences between host and pathogen

Explanation:

Selective toxicity is the mechanism by which antibiotics work. They cause damage to the pathogen but do not harm the host. Hence, they are selectively toxic in their mechanism. They can target both the structural or the metabolic differences between host and pathogen. Many antibiotics target unique sites in the pathogen's structure or the sites which might be present in host cells too but are not essential for the survival of the host. An example of structural difference being targeted by antibiotics is the enzymes which synthesis the bacterial cell wall so that the cell wall is disrupted. A metabolic difference being targeted would be the mechanism by which bacteria replicates so that host cell replication process is not hindered.

7 0

3 years ago