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tatuchka [14]
3 years ago
13

What three things did the original cell theory propose and wht three things does the current cell theory propose?

Biology
1 answer:
xeze [42]3 years ago
7 0
<span> (1) All living things are made up of cells, (2) Cells are the smallest units (or most basic building blocks) of life, and (3) All cells come from preexisting cells through the process of cell division. Cells were first observed by the natural philosopher Robert Hooke in 1665. Though many scientists contributed to the understanding of cells, Matthias Schleiden and Theodor Schwann are credited with describing the first two parts of the cell theory in 1839, and Rudolf Virchow with later contributing the third. Today, the cell theory is considered the foundation of biology.</span>
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The reactive _______ contributes to the ability of aldehydes and ketones to be involved in energy reactions.
STALIN [3.7K]
The reactive CARBONYL GROUP, contributes to the ability of aldehydes and ketones to be involved in energy reactions. Aldehydes and ketones undergo different types of reactions that lead to various products. One example of these reactions are nucloephilic reactions which lead to the production of alcohols, alkenes, diols, imine, etc.
8 0
3 years ago
How does recombination contribute to offspring diversity?A. It modifies chromosomes to generate new alleles of genes that code f
omeli [17]

Answer: D. It yields chromosomes that contain both maternal and paternal DNA.

Explanation:

The recombination or crossing over is a genetic process. It takes place during the Prophase I of meiosis. The homologous pair align and held together by synapsis. This results in the mixture of genes combination formed from both parents that can be represented as a single chromosome.

If the recombination do not occur then each chromosome will be either 100% maternal or paternal. Thus recombination assures the recombinant chromosomes which consists of genetic material from both parents. Thus the genetic diversity of offspring increases.

6 0
2 years ago
Which trimester includes the most rapid growth for baby?
Alika [10]

Answer:

2nd trimester

Explanation

Brain start to be developed in this stage and so a lot of nutrients supplied to them and hence rapid cell division occur which led to rapid growth

4 0
2 years ago
1. What type of information does a pedigree contain?
nevsk [136]
Q1. Pedigree is the recorded lineage of a family. A pedigree chart is actually a diagram showing an appearance and occurrence of phenotypes in several generations. It is used to find a probability of a child inheriting a particular trait or to discover is the trait autosomal or sex-related.

Q2. The presence of a trait in a pedigree chart is shown as filled-in figure. If a square or a circle in the pedigree chart are white (empty), then a person does not have a particular trait. If a figure is filled in (usually black), then a person has a trait. If a figure is half-filled in (e.g. it is half black half white), then a person is only a carrier of a trait but the trait is not expressed.

Q3. In the pedigree charts, squares present males and circles present females. If a female is healthy, the circle is empty (white). If a female is affected with a trait, the circle is filled in (usually black). Similarly, if a male is healthy, the square is empty. If a male is affected with a trait, the square is filled in.

Q4. The presence of dimples is a dominant trait. <span>In dominant traits, traits do not skip generations, unlike recessive traits. From the pedigree, the disorder did not skip any generations. This suggests that the disorder is dominant. If it was recessive, in some generation the trait would not be expressed.

Q5. If a pedigree chart of a family is known, then the occurrence and appearance of a trait can be predicted. For example, if it is known whether a disease is dominant, recessive, or sex-linked, then a possibility of getting a child with a disease can be easily calculated.</span>
6 0
2 years ago
How has technology changed farming?A.Farms produce less food than they used to.B.Pesticides are no longer used on most farms.C.F
soldi70 [24.7K]

Answer:

i think it would be c

Explanation: farmers use mechanical devices to do many tasks.

5 0
3 years ago
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