Biology Answers

In the histologic specimen of loose irregular fibrous connective tissue stained with methyl blue pyronin one can see that some cells contain pyroninophilic cytoplasm, and close to the nucleus in each of the cells there is clearing? What do we call those cells? What function does it perform?

The cellular slime mold Dictyostelium discoideum is a eukaryote that lives on the forest floor as

independent motile cells. When their food supply is exhausted, the amoeba, stop dividing and gather

together to form tiny, multicellular worm like structures, which crawl about as glistening slugs and leave

trails of slime behind them. How do individual amoebae know when to stop dividing and how to find their way into a common aggregate?

It was shown that amoebae aggregate if placed on a glass coverslip under water, provided that simple salts are present. The center of aggregation pattern can be removed with a pipette and placed in a field of fresh amoebae, which immediately start streaming toward it. What does this imply?

Four experiments were designed to determine the nature of the signal by using an existing center of

aggregation as the source of the signal and previously unexposed amoebae as the target cells. The

arrangements of aggregation centers are shown in the figure * below.

What do the results show?

Imagine you are the first microbial cells, new to the scene of earth as a habitat billions of years ago. Describe your surroundings. What does the air contain? what’s the temperature you’re experiencing? what else?

How many grams of KCl (74.6 mw) would you weigh to make 200 ml of 4% (w/v) solution?

Describe the type of injuries that may occur to patients in hospitals.

For each injury explain the preventive measures

1.Do people living in cold regions need to drink same amount of water per day as those living in hot regions?

2. Is the recommended water intake the same for people of different body weights?

Parent 1 is red (Cc) and parent 2 is blue (cc). The offspring in the F1 generation are 50% red and 50% blue. Which allele is dominant? Which allele is recessive?

How might the location of chloroplasts within these cells be advantageous in light absorption? 

For a given gene sequence, how do we find the 5' transcription start site. What is the % similarity to consensus initiator sequence responsible for transcription initiation. How do we identify and mark the binding site for TF ₁ B.

The Philippine mouse deer or pilandok has shorter fur than its counterpart deer in the Arctic region. What characteristic is exhibited in this situation? Will a mouse-deer survive in cold regions? Why or why not?