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creativ13 [48]
3 years ago
12

Seedless bananas were probably first caused by a blank

Biology
1 answer:
lana [24]3 years ago
6 0
In animals and plants, there are two pairs of chromosomes - one set from a male and the other set from a female. But occasionally, the original fertilized cell doesn't quite divide correctly and more than two sets arises. The fertilized cell continues to divide with the result that all the cells have the extra set of chromosomes. This happens much oftener in plants and the plant will be sterile and can't form seeds.
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Myofibrils are made primarily of
Nadusha1986 [10]

Answer:

A) actin and myosin  is a correct answer.

Explanation:

  • Myofibrils are the contractile fiber and they are made of actin and myosin.
  • Myofibrils are made of thick myofilaments and thin myofilaments.
  • Thick myofilaments are made up of myosin whereas thin     myofilaments are composed of actin.
  • The functional unit of muscle is Myofibrils and contraction of muscle occurs due to myofibril, when the filaments actin and myosin interact with each other.

Thus Myofibrils are made primarily of (A) actin and myosin.

5 0
2 years ago
Mae noticed that the birdbath in her backyard loses water more quickly during hot summer days than during the cooler days of the
professor190 [17]

Answer:

B. Water evaporates more quickly when temperatures are high

Explanation:

Constructing an hypothesis is KEY to any experimental setup. It is the first thing to do in accordance to the scientific method. A hypothesis is simply a predicted statement that aims at proferring solution that is subject to testing via experimentation.

According to this question, Mae observed that the birdbath in her backyard loses water more quickly during hot summer days than during the cooler days of the spring. A suitable hypothetical statement for this observation would be: "Water evaporates more quickly when temperatures are high".

N.B: Hypotheses are not questions

4 0
2 years ago
An electric clothes dryer draws 20 A of current from a 240-V wall outlet. How much power, in watts, does it use?
TEA [102]

An electric clothes dryer that draws 20 amps of current from a 240-volt wall outlet will use 4800 watts of power.

The equation is P(W) = I(A) × V<span>(V)</span>

<span>P(W)= amp x voltage</span>

<span>20 amps x 240 volts = 4800 watts.</span>

6 0
3 years ago
Una célula muscular de una especie tiene 20 cromosomas, ¿ cuantos cromosomas crees que tiene una célula nerviosa de la misma esp
irina1246 [14]
46 Cromosomas

Las células del ser humano tienen 23 pares de cromosomas, 22 pares de autosomas y un par de cromosomas sexuales. Por tanto, cada individuo tiene 46 cromosomas en sus células. Por lo tanto, el número de cromosomas presentes en una célula nerviosa de un ser humano es de 46 cromosomas.
7 0
3 years ago
The blood cells containing hemoglobin, an iron-containing protein that transports oxygen, are called __________.
Otrada [13]
<span><span>The blood cells containing hemoglobin,  that transports oxygen (O2) to the body tissues of vertebrates, are called red blood cells.</span> Red blood cells (RBCs), are also referred to as red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes<span>, (from Greek erythros for "red" and kytos for "hollow vessel"..RBCs take up oxygen in the lungs and release it into tissues while squeezing through the body's capillaries.</span></span>

<span> </span>

7 0
3 years ago
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