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3 years ago

What is 1 through 4 because I don't understand it

Biology

1 answer:

horrorfan [7]3 years ago

8 0

The first one is a: mitosis produces two genetically identical daughter cells.

The second one is b: prophase

The third one is a: interphase

The fourth one is c: metaphase.

Mitosis is the process of body (somatic) cells splitting to form new body cells.
It contains 4 phases:
interphase, when the cell is between splits and the chromatin is bundled up.
prophase, when the chromatin doubles and condenses to chromasomes.
metaphase, when the chromasomes line up along the cell equator,
anaphase, where the double chromasomes split into separate groups,
telophase, when the groups form new nuclear envelopes and the cells split.

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Humans share several features with salamanders. Certain genes and proteins are nearly identical between the two species; both sp

Phoenix [80]

Answer:

Homology

Explanation:

Homology refers to the presence of similar or shared body structures, body parts, gene sequences, proteins, etc. among various lineages. It represents divergent evolution of these lineages from a common ancestor.

Presence of various similar structures in human and salamander reflects the fact that these two species have shared a common ancestor during their evolution. The shared ancestry between human and salamander led to the presence of various homologous body parts and identical gene sequences in them.

5 0

2 years ago

Why human cell is consider as eukaryotic cell where as bacteria cell as prokaryotic cell?

Alex73 [517]

They do not have a nucleus or membrane organelles

4 0

2 years ago

Two different enzymes catalyze the same reaction and both exhibit the same Vmax. When Enzyme A was run with a 40 uM substrate, t

Vinil7 [7]

Answer:

a) k_m = 4.08 uM

V_{max} = 20.07 uM/min

b) k_m = 8.16 uM

Explanation:

Given that:

For Enzyme A:

the substrate concentration [S] = 40 uM

the initial velocity rate v = 10 uM/min

when it was 4mM, v = 20 uM/min

i.e.

at 4mM = 4000 uM;

Using Michealis -menten equation;

when v = 10

$V = \dfrac{V_{max}[S]}{k_m+[S]}$

∴

$10 = \dfrac{V_{max}\times 40}{k_m + 40}$

$10 (k_m + 40) = V_{max}40$

$40V_{max} -10k_m = 400 --- (1)$

when v= 20

$20= \dfrac{V_{max}\times 4000}{k_m + 4000}$

$20 (k_m + 4000) = V_{max}4000$

$4000V_{max} -20k_m = 8000 --- (2)$

equating equation (1) and (2):

$40V_{max} -10k_m = 400 --- (1)$

$4000V_{max} -20k_m = 8000 --- (2)$

let multiply equation (1) by 100 and equation (2) by 1

4000V_{max} - 1000K_m = 4000

0 -980k_m = 4000

k_m = 4000/-980

k_m = 4.08 uM

replacing the value of k_m into equation (1)

40{V_max } - 10(4.08) = 400

40{V_max } - 40.8 = 400

40{V_max } = 400 + 40.8

40{V_max } = 440.8

V_{max} = 440.8/40

V_{max} = 11.02 uM/min

Since V_{max} of A ie equivalent to that of B; then:

V_{max} of B = 11.02 uM/min

Here;

[S] = 80 uM

V = 10 uM/min

∴

$10 = \dfrac{11.02 \times 80}{k_m + 80 }$

10(k_m +80) = 881.6

10k_m = 881.6 - 800

10k_m = 81.6

k_m = 81.6/10

k_m = 8.16 uM

8 0

3 years ago

What best describes a derived characteristic

umka2103 [35]

Answer:

They are newly evolved traits.

Explanation:

4 0

3 years ago

Apart from being activated when an individual performs a motor act or observes another individual engaging in the same act, mirr

Hoochie [10]

Apart from being activated when an individual performs a motor act or observes another individual engaging in the same act, mirror neurons in humans are also connected with empathy, the evolution of language and even autism. Mirror neurons make people react or feel the same as the person they are watching, and this is known as empathy. However, for people with autism, they may have reduced mirror neuron activity which causes difficulties for them to detect feelings or empathize with other people.

(American Psychological Association, 2005).

7 0

3 years ago