Answer: The correct answer is as follows:
Stage 1) Egg - Frogs begin their life as fertilized eggs. A typical female frog can lay thousands of eggs, depending on the species. In the pond, the eggs float on the water in clusters until they hatch in 2-3 weeks.
Stage 2) Larva (tadpole) - During the tadpole stage, the frogs eat, grow and develop into froglets (with four legs) through a process called metamorphosis. As tadpoles, they rely on rudimentary gills, mouths, and tails for swimming. The tadpole's diet includes other frog eggs, bugs, mosquito larvae, and other dead insects. As their four legs and external respiration develops, the froglet is almost ready to leave the water.
Stage 3) Adult - At around 12 weeks of age, the frog has reached maturity as an adult and is ready to explore dry land. With its gills and tail totally absorbed back into the body, the frog remains an amphibian but spends most of its time out of the water. As an adult, the frog uses its sticky tongue to capture and eat insects, snails, slugs, and worms. They return to the water to lay new eggs and the cycle of life repeats.
Explanation:
Answer:
The bacterial DNA gets degraded at step 3 of the viral lytic cycle.
Explanation:
Viruses are organisms that are incapable of replicating on their own, hence, they require a living host which they infect and use its replicational ability to reproduce theirselves. The infection cycle of this virus is regarded as its replication cycle. Viruses employ either the LYTIC or LYSOGENIC cycle for infection.
The lytic cycle involves killing of their host cell at the end of the cycle. Generally, the cycle starts with the attachment of my the virus to the cell membrane of its host using specific receptor sites (step 1). It then penetrates the host cell as seen in step 2.
After penetration, the virus then secretes certain degrading enzymes called ENDONUCLEASES that degrades the bacterial DNA. After which the virus uses the replicational and gene expressing ability of the host to transcibe its genetic material and replicate itself. This process called SYNTHESIS occurs in step 3.
Hence, the yellow ring in the image that represents bacterial DNA disappears in step 3 (synthesis stage) because it gets degraded by viral digesting enzymes.
Answer:
B. preservation of advantageous genetic mutations
Explanation:
The process of natural selection involves the preservation of advantageous genetic mutation in a given population.
Natural selection is one of the key factors that ensures the evolution of organisms.
- Desired traits that are able to survive adverse conditions like disease, food shortage, natural disasters are favored by the process of natural selection.
- Traits that also undergo advantageous genetic mutation in order to get a competitive advantage is also accrued to natural selection.
Many soil-dwelling bacteria produce molecules that can be naturally synthesized and kill other species of bacteria. What are these bacteria-killing molecules called antibiotics
Antibiotics are effective pills which can be usually safe. Although they are very helpful in fighting disease, antibiotics can actually be harmful. Important Facts About Antibiotic Safety: Antibiotics can cause side effects such as allergic reactions and severe and potentially life-threatening diarrhea caused by the bacterium Clostridium difficile (C. diff).
Antibiotics can also interfere with other medications you may be taking. Antibiotic side effects account for nearly one-fifth of emergency room visits. These conditions are the most common reasons for emergency room visits for children under the age of 18. Taking antibiotics you don't need unnecessarily exposes you to the drug's side effects and denies you the benefits.
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Answer: Multiple
Explanation: It seems that you are cheating on a multipe choice question
