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ipn [44]
3 years ago
6

Which test tube(s) acts as a negative control?

Biology
1 answer:
Rom4ik [11]3 years ago
7 0
Water is a negative control
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What will happen if the pollen tube pore its content inside the embryo sac?
anastassius [24]

Answer:

Once the embryo sac has developed, pollination has occurred, and the pollen tube has grown into the ovary to make contact with the ovule, fertilization (fusion of egg and sperm) can occur.Typically, the pollen tube reaches the embryo sac via the micropyle (Greek, mikros + pyle = small opening), or opening, in the integuments of the ovule.. There, it discharges its sperm into the embry

Explanation:

The pollen tube enters into the ovule, through the micropyle. Inside the embryo sac, the tip of the pollen tube ruptures and the 2 male gametes are set free near the egg apparatus. Inside the embryo sac, one of the 2 male gametes fuses with the egg nucleus and forms a diploid zygote. This process is called syngamy or true fertilisation.

6 0
3 years ago
Read 2 more answers
Es un combustible fosil utilizado frecuentemente en las hornallas de nuestras cocinas para calentar los alimentos
Daniel [21]

Answer:

Gas natural

Explanation:

5 0
3 years ago
How does passing through clay beds affect groundwater?
Paladinen [302]

Answer:

Passing through clay beds filters groundwater, purifying out soil,  or organic materials, and contaminants to leave behind pure water that fills up aquifers.

Explanation:

I hope this help you .

5 0
3 years ago
Describe what happened when Mendel crossed purebred tall pea plants with short pea plants
Tomtit [17]
He found that the recessive trait such as the short plants disappeared, but only the dominent trait stayed which is tallness. When he allowed them to self pollinate, the recessive gene which is the shortness reappeared.
8 0
3 years ago
a cladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of
pashok25 [27]

Answer:

The correct option is lamprey.

Explanation:

Lamprey is a kind of fish which lack jaws. They lack a true skeleton, but the cartilage is present in them. Due to lack of proper backbone, they look similar to snails. The lamprey reproduces by laying eggs in the water. Larvae tend to develop from these eggs. The lamprey releases its eggs only in freshwater. Only the mature lamprey live in the sea to act as a parasite and take food. For laying eggs, it travels to freshwater.

4 0
3 years ago
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