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irga5000 [103]
3 years ago
12

Secondary succession can only occur as a transition from primary succession. Please select the best answer from the choices prov

ided T F
Biology
2 answers:
Ludmilka [50]3 years ago
8 0
False, secondary succession can also occur from natural disasters, when the environment is destroyed but a bit remains and is able to prosper again
vichka [17]3 years ago
3 0

Answer:

The given statement is false.

Secondary succession is a type of ecological succession which occurs on a pre-existing soil.

It starts from the events like forest fires, hurricanes, tsunami et cetera.  

These events drastically reduce the populations of the already established ecosystem of the area.  

However, it may not eliminate the entire population and some plants and animals may survive the disturbing event.

The left-over population, presence of soil, and seeds and underground vegetative organs of plants such as roots make the foundation for the secondary succession to occur.

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Form a hypothesis that describes how plants such as vines benefit from thigmotropism
Digiron [165]
" I believe plants, more specifically vines, grow faster and stronger using thigmotropism"
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3 years ago
What caused the mass extinction 65 million years ago that caused 75% of all species of plants and animals disappeared within a f
slega [8]

Answer:

An asteroid impact.

Explanation:

An asteroid impact is considered to have tossed rubble across the earth, killing off many species of plants and animals, 65 million years ago. Volcanic activity is involved in at least four mass extinctions, whereas an asteroid in just one.

8 0
4 years ago
List the two elements of Darwin’s theory of evolution. What are some objections to these concepts?
Fynjy0 [20]
The two main points from Darwin's theory of evolution is that 1) most, if not all living organisms evolved from  one or just a few common ancestors and that subsequent specialization of further generations then led to new species. Furthermore, he said that 2) the process how this was done was by natural selection where the organisms which were most adapted to their environment were successfully 'remembered in the gene pool'. 
7 0
3 years ago
What element is necessary for the production of thyroid hormone?
liubo4ka [24]

Answer:

Iodine

Explanation:

This is a trace element needed for the  synthesis of the two thyroid hormone ; T4- thyroxine and T3-triiodothyronine. Four iodine molecules are added in T4 synthesis, and  three for T3 synthesis. Generally T4 is the major hormone produced, but  biologically transformed into active form T3.

Iodine majorly and selenium are the two trace elements needed for thyroid hormones synthesis. Therefore required amount of iodine is important in daily diet. iIn adequate supply of this leads to under production of iodine called hypothyroidism. poor brain development ( especially in kids),and goiter.

Sea foods . eggs, poultry seaweeds are rich sources of iodine.

Conversely, when  excessive amount is present in the blood, autoimmune thyroid diseases can occur,including cancer developments in the thyroid gland due to hyper cell activities.

8 0
3 years ago
You are a biologist on a trip to an island in the South Pacific. While there, you are allowed to collect DNA samples from a loca
marshall27 [118]

Answer:

The options

a. sympatric speciation; vicariance

b. allopatric speciation; vicariance

c. sympatric speciation; dispersal

d. allopatric speciation; dispersal

The CORRECT ANSWER IS d.

d. allopatric speciation; dispersal

Explanation:

Allopatric speciation takes place either via dispersal, when some members of a species shifts it's habitat to a separate geographical area which leads to differentiation of the initial group into separate diverse varieties or species(as in our case study).

Allopatric speciation through dispersal could results in multiple speciation leading to an individual original species producing diverse new species; this occurrence is called adaptive radiation.

In some scenario, a population of an individual species disperses all over a region with each locating a separate niche or isolated habitat. In the course of time, the diverse demands of their just formed lifestyles causes multiple speciation events that comes from a singular species.

5 0
3 years ago
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