Answer:
A) They share short homologies at their respective tips
Explanation:
The cells of human contain two types of chromosomes that is autosomal and sex chromosomes.
The 22 pairs of autosomal chromosomes in humans are formed by the pairing of these chromosomes during the meiotic phase via the formation of a structure called synaptonemal complex between homologous sequences.
However, the two types of sex chromosomes called X and Y are not similar in their length but they pair via the formation of synapse which involves very short homologous sequences called "pseudoautosomal regions". The formation of the synapse through this region is called the X-Y body.
Thus, Option-A is the correct answer.
Explanation:
Mosses go through sporophyte and gametophyte stages in their life cycle. ... However, mosses are nonvascular while ferns are vascular. Gymnosperms and angiosperms are both vascular, seed-bearing plants. However, gymnosperms release their seeds in cones (like pinecones) while angiosperms release their seeds through flowers.
Two problems that today's agriculture has caused is soil erosion
and a decrease in biodiversity in the environment. This is especially due to mono-cropping of large tracks of land. Lands
cleared for agriculture almost immediately begin to erode away, usually by wind
or running water. Due to monocropping, the
reduced variety of plants on the
environment causes a consequent deduction in a variety
of animals in the region such as pollinators
due to the availability of only one type
of plant for pollination.
Answer:
Ocean is the answer. Because it consists in fresh waters and marine
Answer:
The correct answer is b) placing medication drops in nose, eyes, or ears.
Explanation:
Instill refers to the action of pouring or introducing a liquid drop by drop on a mucosal surface or inside a canal or organic cavity, for therapeutic purposes. The most used instillations are: conjunctival, nasal, paranasal, atrial, laryngeal, tracheal, bronchial, bladder and urethral. The instillation can be carried out with the help of a simple common dropper or with an instrument called an instillator, which consists of a probe with a widened end and a syringe with a screw plunger; by activating the screw, the medicine is introduced drop by drop.
