Overexploitation, Habitat loss, invasive species, climate change
Internal fertilization protects<span> the </span>fertilized egg<span> or embryo from predation and harsh environments</span>
Answer:
An important function of seed dormancy is delayed germination, which allows dispersal and prevents simultaneous germination of all seeds. ... Many species of plants have seeds that delay germination for many months or years, and some seeds can remain in the soil seed bank for more than 50 years before germination.
Answer:
Yes
Explanation:
Humans can be attacked by many microbes like bacteria, viruses, fungi, and parasites like flatworms, etc. These parasites and microbes cause different infections and diseases in humans.
This is true to most other species that they also face a similar array of parasite because every species represents a source which can be exploited by an array of parasites. Each parasite attacks on specific organs or tissue which allow different parasite to attack different organs. Therefore it is reasonable.
The B cells are not considered as first line defense structures of the immune’s system
Answer: Option C
<u>Explanation:</u>
Our body is protected internally by nature by many layers of defense. Any microbe or a foreign material that disturbs the body is defended by these barriers.
The first layer of defense required physical and chemical barrier such as the skin, mucous membrane, tears, saliva etc . The second line defense system involves the cells and the tissues that protect the body.
