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shtirl [24]
3 years ago
15

Which of the following differentiates viruses from bacteria? a. viruses need cells in order to replicate, bacteria do not b. vir

uses tend to be much bigger than bacteria c. viruses attack vital organs whereas bacteria primarily infect the bloodstream
Biology
1 answer:
pogonyaev3 years ago
7 0

Answer:

the answer would be a

Explanation:

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What observed reaction did the epinephrine have in the rate of blood flow in the arteriole and capillary?
lidiya [134]

Answer:

The epinephrine reaction is a decrease in the rate of blood flow in the arteriole and capillary, due to a phenomenon of vasoconstriction.

Explanation:

Epinephrine, or adrenaline, is a hormone produced by the adrenal cortex, which acts as a neurotransmitter for the sympathetic nervous system.

One of the effects of epinephrine is the <u>vasoconstriction of blood vessels, predominantly arteries</u>. Vasoconstriction of arterioles and closure of capillaries is an effect of epinephrine that results in a decrease in the rate of blood flow at that level.

This response can be seen when exogenous epinephrine is used to control an allergic or anaphylactic reaction, counteracting the vasodilation that characterizes these conditions.

8 0
3 years ago
What have researchers concluded from the fossil remains of hominin feet from south africa?
Fynjy0 [20]
<span>They indicate many forms of hominins spent considerable time in trees.</span>
8 0
3 years ago
Who proposed biology to be studied as a single subject?
pishuonlain [190]

Answer:

Isaac Newton

Explanation:

아이작 뉴턴

kamsahamnida

5 0
2 years ago
Find the slope between (0,-7) and (7,0). Reduce it.<br> show work
lana66690 [7]

Answer:

\displaystyle m=1

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Coordinates (x, y)
  • Slope Formula: \displaystyle m=\frac{y_2-y_1}{x_2-x_1}

Explanation:

<u>Step 1: Define</u>

Point (0, -7)

Point (7, 0)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute in points [Slope Formula]:                                                             \displaystyle m=\frac{0+7}{7-0}
  2. [Fraction] Add/Subtract:                                                                                 \displaystyle m=\frac{7}{7}
  3. [Fraction] Divide:                                                                                                \displaystyle m=1
5 0
3 years ago
If the frequency of an allele is 0.75, how many copies of this allele should be in a population of 300 diploid individuals?
Ray Of Light [21]

I have provided the options below:

a. 150

b. 225

c. 300

d. 450

e. 75

Answer:

150

Explanation:

Hardy-Weinberg law states, the allelic frequencies of a gene that is, q and p follow the relationship p^2+q^2+2pq = 1, if the population is in equilibrium.

Therefore p^2+q^2+2pq = 1, can be used to calculate the percentage of the allelic frequencies i.e. p^2 and q^2

Allelic frequency = 0.75.

Therefore, the percentage of the allele in the population would be given by

0.75^2 = 0.5625 = 56%.

And the total number of individuals with this allele in the population:

number of individuals = 56×300÷100

= 168 or

150 nearest figure.

8 0
3 years ago
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