External skeleton is the correct answer. Hope this helps out !
Answer: False
Explanation:
Protozoans are not the organism that fix nitrogen for the plants. The organism that fix nitrogen to convert it into a form which can be used by plants are known as diazotrophs.
These are bacteria and archae that fix nitrogen gas found in the atmosphere into more usable form such as ammonia.
These organism can grow without any external source of fixed nitrogen. Example: Rhizobia and azospirillium.
Complete question:
A cross of 2 ♂♀unknown plants produces offspring where three-fourths (¾) have axial flowers and one-fourth (¼) have terminal flowers. What are the genotypes of the parent plants?
Answer:
Both parent plants are heterozygous for the trait. Their genotype is Aa.
Explanation:
Due to technical porblems, you will find the complete explanation in the attached files
Answer:
A species that is not native to a particular region is called an <u>invasive species. </u>
Explanation:
In ecology, invasive species can be described as species which are introduced into an environment. These species are not native to the environment.
Introduction of invasive species in an environment can destroy a stable ecosystem. The invasive species will compete for resources like food, shelter, water etc. They might cause the extinction of the species on which they start feeding. They might fight with predators feeding on the same prey.
