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CaHeK987 [17]
3 years ago
14

List the two elements of Darwin’s theory of evolution. What are some objections to these concepts?

Biology
1 answer:
Fynjy0 [20]3 years ago
7 0
The two main points from Darwin's theory of evolution is that 1) most, if not all living organisms evolved from  one or just a few common ancestors and that subsequent specialization of further generations then led to new species. Furthermore, he said that 2) the process how this was done was by natural selection where the organisms which were most adapted to their environment were successfully 'remembered in the gene pool'. 
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Mendel used single gene (or monohybrid) experiments to describe his law of segregation. He used _______ characters (or dihybrid)
allochka39001 [22]

Answer:

Law of Independent assortment

Explanation:

Gregor Mendel, who was regarded the father of Genetics, discovered principles that governs inheritance in his experiments. He discovered that the alleles of a gene will separate into gametes when he performed a crossed involving a single gene or character like height, pea color etc. He proposed his law of segregation based on this.

However, he considered two characters or genes in his cross, which he called a DIHYBRID cross. He discovered that the alleles of each different gene separates into gametes independently of one another i.e. without one gene influencing the other in each gamete. He called this principle his LAW OF INDEPENDENT ASSORTMENT.

He obtained a 9:3:3:1 phenotypic ratio for the F2 dihybrid offsprings which is only possible if each gamete equally likely contains two alleles of the two different genes in different combinations.

3 0
3 years ago
1. Muscles move tendons attached to bone by performing an action called _______.
REY [17]

1. Contraction

2. Actin

3. Tendons

4. Epidermis

5. Dermis

6. Acne

7. A nerve signal from the brain arrives at the intersection of the nerve and muscle cells and releases acetylcholine from the neuron. This triggers chemical changes in the muscle cell involving ions, including Ca2+. Calcium triggers the thick filaments, made of myosin, to attach to the thin filaments, made of actin, in the muscle cell, and the myosin pulls the actin toward the center of the muscle cell. ATP causes the release of the actin fibers, allowing the muscle to relax and the process to begin again.

For Penn Foster.

5 0
2 years ago
What happens as a result of osmosis when an animal cell containing 1% sugar is placed in pure water
Mama L [17]

The process of osmosis is the movement of water through a selectively permeable membrane from an area of higher concentration to an area of lower concentration.

If 1% sugar solution is placed in pure water, then there would be a higher concentration of water molecules outside the cell compared to inside the cell. The solution outside the cell would be hypo-tonic (containing fewer solute molecules than inside the cell). Water will move into the cell by inward osmosis and the cell would then swell.

4 0
3 years ago
This biome is warm and wet, with little seasonal variation in temperature and frequent precipitation.
Ainat [17]

Tropical rainforest is a biome which  is warm and wet, with little seasonal variation in temperature and frequent precipitation.

<h3>What is a Biome?</h3>

This is referred to an environment which has features such as being greatly influenced by abiotic factors such as sunlight, water etc.

Tropical rainforest as the name implies has a large and frequent amount of precipitation thereby making it wet with little seasonal variation in temperature. It is also characterized by large trees which form canopies in the region.

Read more about Tropical rainforest here brainly.com/question/1146251

#SPJ1

6 0
1 year ago
Why are dead or weakened viruses used instead of normal viruses to create a vaccine?
vodomira [7]
I think its because vaccines are just to help your body learn how to fight off the virus, it’s not to actually give you the virus. Hope this helped!
5 0
2 years ago
Read 2 more answers
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