Answer:
38 chromosomes
Explanation:
- A cat has a diploid chromosome number of 30 (2n=30).
- A rabbit has a diploid chromosome number of 46 (2n=46).
<u>Meiosis generates gametes that contain half the number of chromosomes of somatic cells.</u> Therefore:
- Cat's gametes will be haploid and have 15 chromosomes (n=15).
- Rabbit's gametes will be haploid and have 23 chromosomes (n=23).
An hybrid between a cat and a rabbit would be formed from the union of a cat gamete (n=15) and a rabbit gamete (n=23) that creates a zygote that has 15+23=38 chromosomes. When the zygote divides mitotically, all its somatic cells will contain 38 chromosomes.
Answer:
The correct answer is option D. "Carbon dioxide moved from the atmosphere to the biosphere when photosynthetic organisms began to absorb it".
Explanation:
One of the factors that contributed to extremely hot conditions on Ancient Earth was the high concentration of carbon dioxide in the atmosphere. Carbon dioxide is a greenhouse gas, and it trap the heat of the sun in the atmosphere. Photosynthetic organisms contributed to Earth's cooling by moving carbon dioxide from the atmosphere to the biosphere. Photosynthetic organisms such as algae and plants take carbon dioxide from the atmosphere to synthesize its own food, this helped to reduce carbon dioxide concentration and contributed to ancient Earth cooling.
Grasshoppers and caterpillars eat oak leaves <span>is most likely to result in the most competition among the organisms.
I hope it helped :)</span>
Duckweeds will block the sunlight entering the water and thereby decrease the population of submerged plants.
Option B
<h3><u>Explanation:</u></h3>
Duckweeds are a deadly weed that grows on the surface of water bodies like lakes and ponds. The population of these plants increase to a huge extent because of the fertilizers that drain into these water bodies from the nearby agricultural fields.This is called eutrophication.
Now these plants form a layer covering the surface of the water bodies. This leads to blocking the sunlight from entering inside the water. This leads to sunlight deficiency inside the water body. Thus the plants that are growing on the bottom of these water bodies cannot get sunlight and thus dies.
Answer: RNA polymerases synthesize RNA from a DNA template while DNA polymerases synthesize DNA from a DNA template.
Explanation: RNA polymerase is an enzyme that catalyzes the synthesis of an RNA strand from a DNA template. The process of copying the genetic message in the DNA template into an RNA strand is called transcription. DNA polymerase is the enzyme that catalyzes the synthesis of two new strands of DNA using DNA templates. The process of synthesizing two identical copies of DNA from a double stranded DNA is called replication. RNA polymerase catalyzes transcription while DNA polymerase catalyzes replication.
