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3 years ago

Another page... really need help ASAP

Biology

1 answer:

myrzilka [38]3 years ago

8 0

18) Cell B to cell A because the receptors of cell A are able to recognize the signals from cell B (signal 1). (3)

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Which factor does not play a role in runoff

vladimir1956 [14]

Infiltration is the process by which rainwater becomes groundwater. In the water cycle, which involves primarily; evaporation, condensation and precipitation. Henceforth, after precipitation comes infiltration in the land areas leaving the rainwater aggregated in a single location which accumulates over time. Then this process is followed by runoff and subsurface flow by which water flows through other bodies of water, either in river, sea or ocean, even lake. Other rainwaters that has segregated and wasn’t able to transport itself stays in the process of infiltration, thus groundwater.

Thus, solar radiation doesn't play a role in runoff or infiltration.

5 0

2 years ago

In one type of plant, orange petals (O) are dominant over yellow petals (o) and tall stems (T) are dominant over short stems (t)

vodka [1.7K]

Answer No 1:

The set up of the punnet square is shown in the attached diagram. As the alleles assort independently hence the gametes formed will be OT,Ot,OT,Ot and OT,Ot,oT,ot. These will be the outcomes of the possible gametes formed. When these gametes are cross bred, the results are shown in the diagram attached.

Answer No 2:

The outcomes of each possible genotype are:

OOTT = 2/16

OOTt = 4/16

OOtt = 2/16

Oott = 2/16

OoTT = 2/16

OoTt = 4/16

Answer No 3:

The likelihood of each possible offspring phenotype is:

Orange petals with tall stem and orange petals with small stems present in ratio 12:4 i.e. 3:1.

6 0

3 years ago

Calculate the volume change for respiration in the dark. As you already saw from earlier questions, oxygen production is fairly

Tatiana [17]

Answer:

-1.9mL/min

Explanation:

The rate of O₂ production can be calculated by the formula

= ( Final volume - initial volume)/time(min).

From the graph provided and attached below, the rate of O₂ production or rate of photosynthesis at light intensity of 8 is about 3.75 mL/min.

The rate of O₂ production is taken as the rate of photosynthesis. It is expected to progressively increase from light intensity 0 as light intensity increases. However, at very high light intensity, the rate slows down as water becomes limiting and the stomata closes in order to conserve water.

Question in order

Experiment 2: Respiration in the Dark

Calculate the volume change for respiration in the dark. As you already saw from earlier questions,

oxygen production is fairly constant. You will not need to calculate the individual volume changes.

Just subtract the original volume at 00:00:00 from the final reading at 00:02:00. Record your answer

for use in a later question.

Note: depending on when you started the timer there is a range of possible answers. Pick the answer that is closest to this

What was the volume change for respiration in the dark?

Correct answer:

-1.9 mL/min

7 0

3 years ago

What are the major parts of a cell?

sattari [20]

Answer:

A cell consists of three parts: the cell membrane, the nucleus, and, between the two, the cytoplasm. Within the cytoplasm lie intricate arrangements of fine fibers and hundreds or even thousands of miniscule but distinct structures called organelles.

Explanation:

6 0

3 years ago

Scientists have worked on the structure of DNA and one of their revelations is the antiparallel arrangement of DNA strands. Whic

Lynna [10]

According to my observations the best answer is the option C.The DNA strands are so arranged that you can never have two 5' or 3' at one end.
As,they are anti-parallel and for that reason, one strand goes 5'-3' and the other goes 3'-5' respectively.
I hope its helpful.

3 0

2 years ago