Answers
Answer:
B. False
Explanation:
Life history characteristics and survivorship patterns within a species are pre-set but may be changed according to the changes in environmental conditions needed for growth and reproduction. Allocation of energy to reproduction or other processes varies according to food availability, temperature, rainfall, etc.
Abundant resource availability favors the production of a large number of smaller offspring while limited resources make a population to produce a small number of larger progeny to increase the survival rate.
Example: Clutch size in birds is adjusted to obtain the maximum survival of progeny.
Related Questions
In light of the above statements, how should developing countries deal with the problems associatedwith a lack of clean, fresh water?
Microfilaments (actin) are important forA. cell movement B. maintaining cell shape C. muscle contraction D. A and B only E. A, B and C
Test Tube 4 - Sugar (Sucrose): Demetri fills the fourth test tube one-quarter full of sugar. He then adds water to the test tube until it is three-quarters full and stirs until the sugar dissolves. Demetri then inserts the test strip for 30 seconds and records its color.Test Tube 5 - Sugar (Sucrose) and Lactase Enzyme: Demetri fills the fifth test tube one-quarter full of sugar. He then adds the lactase-and-water solution until the test tube is three-quarters full. He thoroughly mixes the solution and inserts the test strip for 30 seconds. Demetri then records the color of the test strip.Test Tube 6 - Sugar (Sucrose) and Heated Lactase Enzyme: Demetri fills the sixth test tube one-quarter full of sugar. He then adds the heated lactase-and-water solution until the test tube is three-quarters full. He thoroughly mixes the solution and inserts the test strip for 30 seconds. Demetri then records the color of the test strip.According to the test strips, which of these sugar solutions contained glucose?
For the following biomolecular interactions, choose the main weak force interactions that mediates them. Interaction between hydrophobic (nonpolar) amino acid side chains van der Waals interaction Repulsion between negatively charged backbone of DNA double helix van der Waals interaction Interaction between water and carbonyl oxygen of guanine hydrogen bond
OA 3.125 x 108 atoms of calcium-41 and 4.375 x 10⁹ atoms of potassium-41
OB. 6.25 x 108 atoms of calcium-41 and 4.6875 x 10° atoms of potassium-41
OC. 6.25 x 108 atoms of calcium-41 and 4.375 x 109 atoms of potassium-41
OD. 3.125 x 108 atoms of calcium-41 and 4.6875 x 10° atoms of potassium-41
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Answers
The correct answer for this question will be option D.
Calcium-41 = 3.12× atoms
Potassium-41 = 4.69× atoms
As stated in the question,
Half life of isotope of Ca-14 which decays into K-14 = 1.03 × years
Therefore, after 1.03 × years (1 half life)
Ca-41 will be 50%
and, K-41 will be 50%
After 2.06 × years (2 half lives)
Ca-41 will be 25%
K-41 will be 75%
After 3.09 × years (3 half lives)
Ca-41 will be 12.5%
K-41 will be 87.5%
After 4.12 × years (4 half lives)
Ca-41 will be 6.25%
K-41 will be 93.75%
After 4.12 × years,
Ca-41 = 6.25/100 × 5×
= 3.12 × atoms
K-41 = 93.75/100 × 5×
= 4.69 × atoms
Therefore, option D is correct.
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Answers
Answer:
893 snakes after first year
Explanation:
total population= 900
death = 30 per year left= 900-30= 870
birth each year= 20 per year so 870 +20= 890 snakes
6 snakes migrate into the population = 890 + 6= 896 snakes
3 migrate out of the population per year = 896-3= 893 snakes
Final answer:
After accounting for annual birth rate, death rate, and net migration, the snake population after one year would be 893 individuals.
Explanation:
To find out how many individuals are in the population after the first year, we start with the initial count of 900 snakes. We then subtract the death rate, or number of snakes dying per year (30), add the birth rate, or number of snakes being born per year (20), then also add the net migration, or difference between snakes moving into and out of the area (6 entering - 3 exiting = 3 net influx).
So the calculation would look like this: 900 (initial population) - 30 (death rate) + 20 (birth rate) + 3 (net migration) = 893
Therefore, after one year, there would be 893 snakes in this population.
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Answers
Answer:
pp
Explanation:
was added to 9.9 ml of sterile buffer. After thorough mixing, this
suspension was further diluted by a 1/100 dilution followed by a
1/10 dilution. One-tenth of a ml of this final dilution was plated
on agar plates. After incubation, 52 colonies were present. How
many colony-forming units were present in the total 10 gram sample
of hamburger?
Answers
Answer:
5.2 × 10 ⁹ cfus
Explanation:
Using the dilution factors
0.1 ml of the final dilution has 52 colonies
1 ml will have approximately 520 colonies
10 ml of the final sample will have 5200 colonies
at 1 / 100 dilution
1 ml of the sample will have 5200 colonies
100 ml of the sample will have 520000 colonies
1 ml of the 0.1 ml + 9.9 ml has 520000 colonies
10 ml will have 5200000
at the second stage of the dilution
0.1 ml of the slurry had 5200000 colonies
1 ml will have 52000000 colonies
10 ml will have 520000000 colonies
100 ml of the initial sample ( 10 grams + 90 ml ) = 5200000000 colonies =
5.2 × 10 ⁹ cfu
Answers
RNA consists of a single strand that folds into various shapes.
DNA was then heralded to be the blueprint of life because it is chemically more stable than RNA
DNA has two strands
RNA has two complementary strands
Final answer:
DNA and RNA have differences in structure, bases, and function.
Explanation:
There are three main differences between DNA and RNA:
- Structure: DNA is a double-stranded helix while RNA is a single-stranded molecule.
- Bases: DNA contains the bases adenine (A), thymine (T), cytosine (C), and guanine (G), while RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G).
- Function: DNA stores genetic information and is involved in heredity, while RNA plays a role in protein synthesis and gene expression.
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B. produce NADPH
C. reduce carbon dioxide into glucose
D. None of these are correct
Answers
Answer:
C
Explanation:
The energy source is ATP, and the reducing agent is NADPH, which adds high-energy electrons to produce sugar.