1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dimaraw [331]
3 years ago
5

Why was there such a lack of diversity in life during precambrian time?

Biology
1 answer:
Norma-Jean [14]3 years ago
4 0

Mainly because of time. The precambrian era started millions of years ago, and organisms didn't have enough time to change and adapt to form new species, since this is something that takes a long time to occur.


Hope it helped,


BioTeacher101

You might be interested in
assume that life on Mars requires cell potential to be 100mV, and the extracellular concentrations of the three major species ar
svetlana [45]

Answer:

Explanation:

From the information given:

The cell potential on mars E = + 100 mV

By using Goldman's equation:

E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}}      \Big )

Let's take a look at the impermeable cell with respect to two species;

and the two species be Na⁺ and Cl⁻

E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}

where;

z = ionic charge on the species = + 1

F = faraday constant

∴

100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In}  \Big ( \dfrac{4}{[K^+]_{in}}   \Big)

100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}}   \Big)

3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}}   \Big)

exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\  53.57 = \dfrac{4}{[K^+]_{in}}

[K^+]_{in} = \dfrac{4}{53.57}

[K^+]_{in}  = 0.0476

For [Cl⁻]:

100 \times 10^{-3} = -0.0257 \  \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}}   \Big)

-3.981 =  \  \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}}   \Big)

0.01867 =  \dfrac{120}{[Cl^-]_{in}}

[Cl^-]_{in} = \dfrac{120}{0.01867}

[Cl^-]_{in} =6427.4

For [Na⁺]:

100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}}   \Big)

53.57= \Big ( \dfrac{145}{[Na^+]_{in}}   \Big)

[Na^+]_{in}= 2.70

6 0
2 years ago
Can u plz answer this​
Tcecarenko [31]

b. commensalism

d. coyote is at the top of that chain so it gets the least energy

c. mistletoe is a parasite. the other options aren't symbiotic relationships

3 0
3 years ago
The foliated metamorphic rock that forms when the sedimentary rock shale is subjected to relatively low temperatures and pressur
ASHA 777 [7]
The answer is slate .
5 0
2 years ago
Why does a pea plant with the genotype Rr produce some gametes that have the allele for round seeds?
Amiraneli [1.4K]

Answer:

The correct answer is - due to the law of segregation.

Explanation:

In the given case the genotype of Rr and as we know R is a dominant characteristic for round seeds and r represents the recessive allele for wrinkled seeds in a pea plant. So if a plant has Rr in its genotype it means it is a phenotypically round pea plant due to dominance in this heterozygous case.

The law of segregation states that two alleles of a gene of a specific trait will be distributed randomly and there is an equal chance of each allele to end up in the gametes, similarly in this case both alleles can be segregated to gametes and it is a random process.

3 0
2 years ago
How many gigatonnes of carbon are stored in each of the following locations?
leonid [27]

a)121 million gigatons or 121 million billion metric tons" of carbon).

B)The ocean, with around 38,000 gigatons

c)60 gigatons of carbon

3 0
3 years ago
Other questions:
  • Select all that apply. Chromosomes _____.
    8·1 answer
  • Which statement best describes the function of ATP synthase?ATP synthase pumps protons back into the mitochondrial matrix.ATP sy
    7·1 answer
  • Analysis Questions: 1. What is the function of plant roots? 2. What is the function of root hairs? 3. What plant tissue are root
    12·1 answer
  • Because Spain held such a dominant presence in the Americas, Portugal focused on _________.
    14·2 answers
  • During cellular respiration, energy is stored in the form of _______.
    15·2 answers
  • Water evaporates from a lake. Arrange the next steps of the water cycle in the correct order.
    11·2 answers
  • Need immediately please #6-9
    15·2 answers
  • What is the critical mass of a species?
    6·2 answers
  • FAST!!! NEED HELP!
    11·2 answers
  • 2). WHAT TWO THINGS MUST HAPPEN TO PEOPLE IN DEVELOPING COUNTRIES IN ORDER TO BECOME LIKE INDUSTRIALIZED COUNTRIES AND BE ABLE T
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!