Explanation

The percentage of insect species out of all known organisms is approximately 53.1%,

While it's estimated that there are around 1.7 million known species, insects constitute over half of that number, with estimates suggesting around 900,000 species of insects. 

Explanation

A capsid is a protein coat surrounding a virus's genetic material, and it's composed of individual protein subunits called capsomeres

Explanation

1. The herpes virus capsid contains 162 capsomeres

. These capsomeres are arranged in an icosahedral shape, with 12 pentons (at the vertices) and 150 hexons (on the faces). 

Explanation

Bacteriophages are significantly smaller than the bacteria they infect, meaning the volume of a phage is roughly 1/1000 of the host cell's volume. 

Explanation

In angiosperms (flowering plants), the endosperm is a triploid (3n) tissue that provides nourishment to the developing embryo.

It is formed during double fertilization, where one sperm nucleus fuses with the egg cell to form the zygote, and another sperm nucleus fuses with two polar nuclei in the embryo sac to create the triploid endosperm.

This triploid nature is a key characteristic of angiosperms and distinguishes them from gymnosperms, where the endosperm is haploid. 

Explanation

Gymnosperms are plants with exposed seeds, and Gingko is a well-known example of this type of plant. 

Explanation

Within the ovule of Pinus, a megaspore mother cell undergoes meiosis, resulting in the production of four haploid megaspores.

However, only one of these megaspores survives and develops into the female gametophyte. 

Explanation

The central requirement in the maintenance of an organism is homeostasis, which is the ability to maintain a stable internal environment despite external changes.

This involves regulating various internal conditions such as body temperature, blood pH, and fluid balance to ensure optimal functioning. 

Explanation

The process of detecting a change and signaling the effector's response in a control system is called a feedback mechanism.

This mechanism involves a receptor detecting a change, a control center (integrator) processing the information, and an effector carrying out the necessary response to maintain or restore a desired state. 

Explanation

The hypothalamus is a part of the brain that acts as the body's thermostat, regulating body temperature by adjusting heat production and heat loss to maintain a stable core temperature.