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What does alternation of generation really mean? Could you please explain it in simpler words?

What is the term used to describe diets which lack proteins and carbohydrates?

The locomotory organs of Echinoderms are called:

Identify the incorrect match among options below w.r.t plasma constituents with their descriptions and function(s).

Growth plotted against time give a

Plants belonging to Solanaceae have a tap root. What does this statement tell about them?

Sealand's crocodile population has been on the decline in recent years, primarily because of hunting. Crocodiles prey heavily on a species of freshwater fish that is highly valued as food by Sealanders, who had hoped that the decline in the crocodile population would lead to an increase in the numbers of these fish available for human consumption. Yet the population of this fish species has also declined, even though the annual number caught for human consumption has not increased.

Which of the following, if true, most helps to explain the decline in the population of the fish species? Enter the option sequences in the blank given below
A. Yellow blight, a fatal disease that was not prevalent in the region's freshwater fishes a few years back has now reached epidemic proportions
B. Over the last few years, Sealand's commercial fishing enterprises have increased the number of fishing boats they use.
C. The main predator of these fish is another species of fish on which crocodiles also prey.
D. Many Sealanders who hunt crocodiles do so because of the high market price of crocodile skins, not because of the threat crocodiles pose to the fish population.
E. In several neighbouring countries through which Sealand's rivers also flow, crocodiles are at risk of extinction as a result of extensive hunting.
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What is meant by acaulescent habitat?

Regarding the assertion and reason; choose the correct option.

Assertion [A]: The various grades of taxa are interlinked.

Reason [R]: The relations and similarities increase in the descending order (with regard to the size of the taxon).

With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.

If the length of E. coli DNA is 1.36 mm, can you calculate the number of base pairs in E.coli?

Diploblastic animals are with:

Coconut milk factor is a/an ______.

The process of mineralization by microorganisms helps in release of

Why a person suffering from a high blood pressure is advised to take minimum quantity of salt

Match the placentation!

Which chamber of the heart receives blood from the lungs?

Which of these would be required for the regulation of cell cycle ?

If the percentage of cytosine is 18%, then the percentage of adenine will be

Which of the following needs no digestion?

Can you identify the correct sequence of taxonomical categories?

(a) Species $\to$ Order $\to$ Phylum $\to$ Kingdom

(b) Genus $\to$ Species $\to$ Order Kingdom

(c) Species $\to$ Genus $\to$ order $\to$ Phylum

How many meiotic divisions of the pollen mother cell (PMC) are required to produce 1000 pollen grains?

How useful is the study of the nature of the body cavity and coelom in the classification of animals?

Read the following passage and answer the question that follows.

Until recently, many biologists believed that invertebrate “schools” were actually transient assemblages, brought together by wind, currents, waves, or common food sources. Jellyfish groupings, for example, cannot be described as schools—cohesive social units whose members are evenly spaced and face the same way. However, recent research has found numerous cases in which crustaceans and other invertebrates form schools as fish do. Schooling crustaceans such as krill regularly collect in such massive numbers that they provide abundant food for fish, seabirds, and whales. Like schooling fish, invertebrates with sufficient mobility to school will swim in positions that are consistent relative to fellow school members, and are neither directly above nor directly below a neighbor. The internal structure of such a school changes little with external physical disruption but dramatically with the advent of a predator. Since schooling is an active behavior, researchers assume that it must bring important benefits. True, schooling would appear to make animals more visible and attractive to predators. However, schooling leaves vast tracts of empty water, thereby reducing a predator’s chances of picking up the school’s trail. A large group maintains surveillance better than an individual can, and may discourage predation by appearing to be one massive animal.

According to the passage, what are the advantages of schooling for invertebrates?

The main reason for the virulent nature of the S strain of Streptococcus pneumoniae is the presence of:

Both autogamy and geitonogamy are prevented in:

Carbon dioxide is called greenhouse gas because it is:

Which of the following are not matched correctly:

Select the correct statements regarding cannabinoids.